diff --git a/404.html b/404.html index 67b73ffea..1e19f4326 100644 --- a/404.html +++ b/404.html @@ -18,13 +18,13 @@ - - + + -

404

There's nothing here.
+ - + diff --git a/api.html b/api.html index 01d01adae..69ac45ac9 100644 --- a/api.html +++ b/api.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator
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"),a("h3",{attrs:{id:"define-keyword-with-compile-function"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#define-keyword-with-compile-function"}},[t._v("#")]),t._v(' Define keyword with "compile" function')]),t._v(" "),a("p",[t._v('The keyword is similar to "validate", with the difference that "compile" property has function that will be called during schema compilation and should return validation function:')]),t._v(" "),a("div",{staticClass:"language-typescript extra-class"},[a("pre",{pre:!0,attrs:{class:"language-typescript"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("interface")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("FuncKeywordDefinition")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("extends")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("_KeywordDef")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n 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operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("boolean")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// schema: false makes validate not to expect schema (DataValidateFunction)")]),t._v("\n modifying"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("?")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("boolean")]),t._v("\n async"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("?")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("boolean")]),t._v("\n valid"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("?")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("boolean")]),t._v("\n errors"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("?")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("boolean")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("|")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"full"')]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n")])])]),a("p",[t._v("In some cases it is the best approach to define keywords, but it has the performance cost of an extra function call during validation. If keyword logic can be expressed via some other JSON Schema then "),a("code",[t._v("macro")]),t._v(" keyword definition is more efficient (see below).")]),t._v(" "),a("p",[t._v("Example. "),a("code",[t._v("range")]),t._v(" and "),a("code",[t._v("exclusiveRange")]),t._v(" keywords using compiled schema:")]),t._v(" "),a("div",{staticClass:"language-javascript extra-class"},[a("pre",{pre:!0,attrs:{class:"language-javascript"}},[a("code",[t._v("ajv"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("addKeyword")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token literal-property property"}},[t._v("keyword")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"range"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token literal-property property"}},[t._v("type")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"number"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("compile")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token parameter"}},[a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("[")]),t._v("min"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" max"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" parentSchema")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" parentSchema"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("exclusiveRange 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"),a("h3",{attrs:{id:"define-keyword-with-macro-function"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#define-keyword-with-macro-function"}},[t._v("#")]),t._v(' Define keyword with "macro" function')]),t._v(" "),a("p",[t._v("Keyword definition:")]),t._v(" "),a("div",{staticClass:"language-typescript extra-class"},[a("pre",{pre:!0,attrs:{class:"language-typescript"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("interface")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("MacroKeywordDefinition")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("extends")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("FuncKeywordDefinition")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function-variable function"}},[t._v("macro")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" 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Default is to return after the first error.")]),t._v(" "),e("h3",{attrs:{id:"verbose"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#verbose"}},[t._v("#")]),t._v(" verbose")]),t._v(" "),e("p",[t._v("Include the reference to the part of the schema ("),e("code",[t._v("schema")]),t._v(" and "),e("code",[t._v("parentSchema")]),t._v(") and validated data in errors (false by default).")]),t._v(" "),e("h3",{attrs:{id:"discriminator"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#discriminator"}},[t._v("#")]),t._v(" discriminator")]),t._v(" "),e("p",[t._v("Support "),e("RouterLink",{attrs:{to:"/json-schema.html#discriminator"}},[t._v("discriminator keyword")]),t._v(" from "),e("a",{attrs:{href:"https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md",target:"_blank",rel:"noopener noreferrer"}},[t._v("OpenAPI specification"),e("OutboundLink")],1),t._v(".")],1),t._v(" "),e("h3",{attrs:{id:"unicoderegexp"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#unicoderegexp"}},[t._v("#")]),t._v(" unicodeRegExp")]),t._v(" "),e("p",[t._v('By default Ajv uses unicode flag "u" with "pattern" and "patternProperties", as per JSON Schema spec. See '),e("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode",target:"_blank",rel:"noopener noreferrer"}},[t._v("RegExp.prototype.unicode"),e("OutboundLink")],1),t._v(" .")]),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("true")]),t._v(' (default) - use unicode flag "u".')]),t._v(" "),e("li",[e("code",[t._v("false")]),t._v(' - do not use flag "u".')])]),t._v(" "),e("h3",{attrs:{id:"timestamp"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#timestamp"}},[t._v("#")]),t._v(" timestamp "),e("Badge",{attrs:{text:"JTD only"}})],1),t._v(" "),e("p",[t._v("Defines which Javascript types will be accepted for the "),e("a",{attrs:{href:"./json-type-definition#type-form"}},[t._v("JTD timestamp type")]),t._v(".")]),t._v(" "),e("p",[t._v("By default Ajv will accept both Date objects and "),e("a",{attrs:{href:"https://datatracker.ietf.org/doc/rfc3339/",target:"_blank",rel:"noopener noreferrer"}},[t._v("RFC3339"),e("OutboundLink")],1),t._v(" strings. You can specify allowed values with the option "),e("code",[t._v('timestamp: "date"')]),t._v(" or "),e("code",[t._v('timestamp: "string"')]),t._v(".")]),t._v(" "),e("h3",{attrs:{id:"parsedate"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#parsedate"}},[t._v("#")]),t._v(" parseDate "),e("Badge",{attrs:{text:"JTD only"}})],1),t._v(" "),e("p",[t._v("Defines how date-time strings are parsed by "),e("RouterLink",{attrs:{to:"/api.html#jtd-parse"}},[t._v("JTD parsers")]),t._v(". By default Ajv parses date-time strings as string. Use "),e("code",[t._v("parseDate: true")]),t._v(" to parse them as Date objects.")],1),t._v(" "),e("h3",{attrs:{id:"allowdate"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#allowdate"}},[t._v("#")]),t._v(" allowDate "),e("Badge",{attrs:{text:"JTD only"}})],1),t._v(" "),e("p",[t._v("Defines how date-time strings are parsed and validated. By default Ajv only allows full date-time strings, as required by JTD specification. Use "),e("code",[t._v("allowDate: true")]),t._v(" to allow date strings both for validation and for parsing.")]),t._v(" "),e("div",{staticClass:"custom-block warning"},[e("p",{staticClass:"custom-block-title"},[t._v("Option allowDate is not portable")]),t._v(" "),e("p",[t._v("This option makes JTD validation and parsing more permissive and non-standard. The date strings without time part will be accepted by Ajv, but will be rejected by other JTD validators.")])]),t._v(" "),e("h3",{attrs:{id:"int32range"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#int32range"}},[t._v("#")]),t._v(" int32range "),e("Badge",{attrs:{text:"JTD only"}})],1),t._v(" "),e("p",[t._v("Can be used to disable range checking for "),e("code",[t._v("int32")]),t._v(" and "),e("code",[t._v("uint32")]),t._v(" types.")]),t._v(" "),e("p",[t._v("By default Ajv limits the range of these types to "),e("code",[t._v("[-2**31, 2**31 - 1]")]),t._v(" for "),e("code",[t._v("int32")]),t._v(" and to "),e("code",[t._v("[0, 2**32-1]")]),t._v(" for "),e("code",[t._v("uint32")]),t._v(" when validating and parsing.")]),t._v(" "),e("p",[t._v("With option "),e("code",[t._v("int32range: false")]),t._v(" Ajv only requires that "),e("code",[t._v("uint32")]),t._v(" is non-negative, otherwise does not check the range. Parser will limit the number size to 16 digits (approx. "),e("code",[t._v("2**53")]),t._v(" - safe integer range).")]),t._v(" "),e("div",{staticClass:"custom-block warning"},[e("p",{staticClass:"custom-block-title"},[t._v("Option int32range is not portable")]),t._v(" "),e("p",[t._v("This option makes JTD validation and parsing more permissive and non-standard. The integers within a wider range will be accepted by Ajv, but will be rejected by other JTD validators.")])]),t._v(" "),e("h3",{attrs:{id:"comment"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#comment"}},[t._v("#")]),t._v(" $comment")]),t._v(" "),e("p",[t._v("Log or pass the value of "),e("code",[t._v("$comment")]),t._v(" keyword to a function.")]),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("false")]),t._v(" (default): ignore $comment keyword.")]),t._v(" "),e("li",[e("code",[t._v("true")]),t._v(": log the keyword value to console.")]),t._v(" "),e("li",[t._v("function: pass the keyword value, its schema path and root schema to the specified function")])]),t._v(" "),e("h3",{attrs:{id:"formats"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#formats"}},[t._v("#")]),t._v(" formats")]),t._v(" "),e("p",[t._v("An object with format definitions. Keys and values will be passed to "),e("code",[t._v("addFormat")]),t._v(" method. Pass "),e("code",[t._v("true")]),t._v(" as format definition to ignore some formats.")]),t._v(" "),e("h3",{attrs:{id:"keywords"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#keywords"}},[t._v("#")]),t._v(" keywords")]),t._v(" "),e("p",[t._v("An array of keyword definitions or strings. Values will be passed to "),e("code",[t._v("addKeyword")]),t._v(" method.")]),t._v(" "),e("h3",{attrs:{id:"schemas"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#schemas"}},[t._v("#")]),t._v(" schemas")]),t._v(" "),e("p",[t._v("An array or object of schemas that will be added to the instance. In case you pass the array the schemas must have IDs in them. When the object is passed the method "),e("code",[t._v("addSchema(value, key)")]),t._v(" will be called for each schema in this object.")]),t._v(" "),e("h3",{attrs:{id:"logger"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#logger"}},[t._v("#")]),t._v(" logger")]),t._v(" "),e("p",[t._v("Sets the logging method. Default is the global "),e("code",[t._v("console")]),t._v(" object that should have methods "),e("code",[t._v("log")]),t._v(", "),e("code",[t._v("warn")]),t._v(" and "),e("code",[t._v("error")]),t._v(". See "),e("RouterLink",{attrs:{to:"/api.html#error-logging"}},[t._v("Error logging")]),t._v(".")],1),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[t._v("logger instance - it should have methods "),e("code",[t._v("log")]),t._v(", "),e("code",[t._v("warn")]),t._v(" and "),e("code",[t._v("error")]),t._v(". If any of these methods is missing an exception will be thrown.")]),t._v(" "),e("li",[e("code",[t._v("false")]),t._v(" - logging is disabled.")])]),t._v(" "),e("h3",{attrs:{id:"loadschema"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#loadschema"}},[t._v("#")]),t._v(" loadSchema")]),t._v(" "),e("p",[t._v("Asynchronous function that will be used to load remote schemas when "),e("code",[t._v("compileAsync")]),t._v(" "),e("a",{attrs:{href:"#api-compileAsync"}},[t._v("method")]),t._v(" is used and some reference is missing (option "),e("code",[t._v("missingRefs")]),t._v(" should NOT be 'fail' or 'ignore'). This function should accept remote schema uri as a parameter and return a Promise that resolves to a schema. See example in "),e("RouterLink",{attrs:{to:"/guide/managing-schemas.html#asynchronous-schema-compilation"}},[t._v("Asynchronous compilation")]),t._v(".")],1),t._v(" "),e("h2",{attrs:{id:"options-to-modify-validated-data"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#options-to-modify-validated-data"}},[t._v("#")]),t._v(" Options to modify validated data")]),t._v(" "),e("h3",{attrs:{id:"removeadditional"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#removeadditional"}},[t._v("#")]),t._v(" removeAdditional")]),t._v(" "),e("p",[t._v("Remove additional properties - see example in "),e("RouterLink",{attrs:{to:"/guide/modifying-data.html#removing-additional-properties"}},[t._v("Removing additional properties")]),t._v(".")],1),t._v(" "),e("p",[t._v("This option is not used if schema is added with "),e("code",[t._v("addMetaSchema")]),t._v(" method.")]),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("false")]),t._v(" (default) - not to remove additional properties")]),t._v(" "),e("li",[e("code",[t._v('"all"')]),t._v(" - all additional properties are removed, regardless of "),e("code",[t._v("additionalProperties")]),t._v(" keyword in schema (and no validation is made for them).")]),t._v(" "),e("li",[e("code",[t._v("true")]),t._v(" - only additional properties with "),e("code",[t._v("additionalProperties")]),t._v(" keyword equal to "),e("code",[t._v("false")]),t._v(" are removed.")]),t._v(" "),e("li",[e("code",[t._v('"failing"')]),t._v(" - additional properties that fail schema validation will be removed (where "),e("code",[t._v("additionalProperties")]),t._v(" keyword is "),e("code",[t._v("false")]),t._v(" or schema).")])]),t._v(" "),e("h3",{attrs:{id:"usedefaults"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#usedefaults"}},[t._v("#")]),t._v(" useDefaults")]),t._v(" "),e("p",[t._v("Replace missing or undefined properties and items with the values from corresponding "),e("code",[t._v("default")]),t._v(" keywords. Default behaviour is to ignore "),e("code",[t._v("default")]),t._v(" keywords. This option is not used if schema is added with "),e("code",[t._v("addMetaSchema")]),t._v(" method.")]),t._v(" "),e("p",[t._v("See examples in "),e("RouterLink",{attrs:{to:"/guide/modifying-data.html#assigning-defaults"}},[t._v("Assigning defaults")]),t._v(".")],1),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("false")]),t._v(" (default) - do not use defaults")]),t._v(" "),e("li",[e("code",[t._v("true")]),t._v(" - insert defaults by value (object literal is used).")]),t._v(" "),e("li",[e("code",[t._v('"empty"')]),t._v(" - in addition to missing or undefined, use defaults for properties and items that are equal to "),e("code",[t._v("null")]),t._v(" or "),e("code",[t._v('""')]),t._v(" (an empty string).")])]),t._v(" "),e("h3",{attrs:{id:"coercetypes"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#coercetypes"}},[t._v("#")]),t._v(" coerceTypes")]),t._v(" "),e("p",[t._v("Change data type of data to match "),e("code",[t._v("type")]),t._v(" keyword. See the example in "),e("RouterLink",{attrs:{to:"/guide/modifying-data.html#coercing-data-types"}},[t._v("Coercing data types")]),t._v(" and "),e("RouterLink",{attrs:{to:"/coercion.html"}},[t._v("coercion rules")]),t._v(".")],1),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("false")]),t._v(" (default) - no type coercion.")]),t._v(" "),e("li",[e("code",[t._v("true")]),t._v(" - coerce scalar data types.")]),t._v(" "),e("li",[e("code",[t._v('"array"')]),t._v(" - in addition to coercions between scalar types, coerce scalar data to an array with one element and vice versa (as required by the schema).")])]),t._v(" "),e("h2",{attrs:{id:"advanced-options"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#advanced-options"}},[t._v("#")]),t._v(" Advanced options")]),t._v(" "),e("h3",{attrs:{id:"meta"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#meta"}},[t._v("#")]),t._v(" meta")]),t._v(" "),e("p",[t._v("Add "),e("a",{attrs:{href:"http://json-schema.org/documentation.html",target:"_blank",rel:"noopener noreferrer"}},[t._v("meta-schema"),e("OutboundLink")],1),t._v(" so it can be used by other schemas (true by default). If an object is passed, it will be used as the default meta-schema for schemas that have no "),e("code",[t._v("$schema")]),t._v(" keyword. This default meta-schema MUST have "),e("code",[t._v("$schema")]),t._v(" keyword.")]),t._v(" "),e("h3",{attrs:{id:"validateschema"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#validateschema"}},[t._v("#")]),t._v(" validateSchema")]),t._v(" "),e("p",[t._v("Validate added/compiled schemas against meta-schema (true by default). "),e("code",[t._v("$schema")]),t._v(" property in the schema can be http://json-schema.org/draft-07/schema or absent (draft-07 meta-schema will be used) or can be a reference to the schema previously added with "),e("code",[t._v("addMetaSchema")]),t._v(" method.")]),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("true")]),t._v(" (default) - if the validation fails, throw the exception.")]),t._v(" "),e("li",[e("code",[t._v('"log"')]),t._v(" - if the validation fails, log error.")]),t._v(" "),e("li",[e("code",[t._v("false")]),t._v(" - skip schema validation.")])]),t._v(" "),e("h3",{attrs:{id:"addusedschema"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#addusedschema"}},[t._v("#")]),t._v(" addUsedSchema")]),t._v(" "),e("p",[t._v("By default methods "),e("code",[t._v("compile")]),t._v(" and "),e("code",[t._v("validate")]),t._v(" add schemas to the instance if they have "),e("code",[t._v("$id")]),t._v(" (or "),e("code",[t._v("id")]),t._v(') property that doesn\'t start with "#". If '),e("code",[t._v("$id")]),t._v(" is present and it is not unique the exception will be thrown. Set this option to "),e("code",[t._v("false")]),t._v(" to skip adding schemas to the instance and the "),e("code",[t._v("$id")]),t._v(" uniqueness check when these methods are used. This option does not affect "),e("code",[t._v("addSchema")]),t._v(" method.")]),t._v(" "),e("h3",{attrs:{id:"inlinerefs"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#inlinerefs"}},[t._v("#")]),t._v(" inlineRefs")]),t._v(" "),e("p",[t._v("Affects compilation of referenced schemas.")]),t._v(" "),e("p",[t._v("Option values:")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("true")]),t._v(" (default) - the referenced schemas that don't have refs in them are inlined, regardless of their size - it improves performance.")]),t._v(" "),e("li",[e("code",[t._v("false")]),t._v(" - to not inline referenced schemas (they will always be compiled as separate functions).")]),t._v(" "),e("li",[t._v("integer number - to limit the maximum number of keywords of the schema that will be inlined (to balance the total size of compiled functions and performance).")])]),t._v(" "),e("h3",{attrs:{id:"passcontext"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#passcontext"}},[t._v("#")]),t._v(" passContext")]),t._v(" "),e("p",[t._v("Pass validation context to "),e("em",[t._v("compile")]),t._v(" and "),e("em",[t._v("validate")]),t._v(" keyword functions. If this option is "),e("code",[t._v("true")]),t._v(" and you pass some context to the compiled validation function with "),e("code",[t._v("validate.call(context, data)")]),t._v(", the "),e("code",[t._v("context")]),t._v(" will be available as "),e("code",[t._v("this")]),t._v(" in your keywords. By default "),e("code",[t._v("this")]),t._v(" is Ajv instance.")]),t._v(" "),e("h3",{attrs:{id:"looprequired"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#looprequired"}},[t._v("#")]),t._v(" loopRequired")]),t._v(" "),e("p",[t._v("By default "),e("code",[t._v("required")]),t._v(" keyword is compiled into a single expression (or a sequence of statements in "),e("code",[t._v("allErrors")]),t._v(" mode) up to 200 required properties. Pass integer to set a different number of properties above which "),e("code",[t._v("required")]),t._v(" keyword will be validated in a loop (with a smaller validation function size and worse performance).")]),t._v(" "),e("h3",{attrs:{id:"loopenum"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#loopenum"}},[t._v("#")]),t._v(" loopEnum "),e("Badge",{attrs:{text:"v7"}})],1),t._v(" "),e("p",[t._v("By default "),e("code",[t._v("enum")]),t._v(" keyword is compiled into a single expression with up to 200 allowed values. Pass integer to set the number of values above which "),e("code",[t._v("enum")]),t._v(" keyword will be validated in a loop (with a smaller validation function size and worse performance).")]),t._v(" "),e("h3",{attrs:{id:"ownproperties"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#ownproperties"}},[t._v("#")]),t._v(" ownProperties")]),t._v(" "),e("p",[t._v("By default Ajv iterates over all enumerable object properties; when this option is "),e("code",[t._v("true")]),t._v(" only own enumerable object properties (i.e. found directly on the object rather than on its prototype) are iterated. Contributed by @mbroadst.")]),t._v(" "),e("h3",{attrs:{id:"multipleofprecision"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#multipleofprecision"}},[t._v("#")]),t._v(" multipleOfPrecision")]),t._v(" "),e("p",[t._v("By default "),e("code",[t._v("multipleOf")]),t._v(" keyword is validated by comparing the result of division with "),e("code",[t._v("parseInt()")]),t._v(" of that result. It works for dividers that are bigger than 1. For small dividers such as 0.01 the result of the division is usually not integer (even when it should be integer, see issue "),e("a",{attrs:{href:"https://github.com/ajv-validator/ajv/issues/84",target:"_blank",rel:"noopener noreferrer"}},[t._v("#84"),e("OutboundLink")],1),t._v("). If you need to use fractional dividers set this option to some positive integer N to have "),e("code",[t._v("multipleOf")]),t._v(" validated using this formula: "),e("code",[t._v("Math.abs(Math.round(division) - division) < 1e-N")]),t._v(" (it is slower but allows for float arithmetic deviations).")]),t._v(" "),e("h3",{attrs:{id:"messages"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#messages"}},[t._v("#")]),t._v(" messages")]),t._v(" "),e("p",[t._v("Include human-readable messages in errors. "),e("code",[t._v("true")]),t._v(" by default. "),e("code",[t._v("false")]),t._v(" can be passed when messages are generated outside of Ajv code (e.g. with "),e("a",{attrs:{href:"https://github.com/ajv-validator/ajv-i18n",target:"_blank",rel:"noopener noreferrer"}},[t._v("ajv-i18n"),e("OutboundLink")],1),t._v(").")]),t._v(" "),e("h3",{attrs:{id:"uriresolver"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#uriresolver"}},[t._v("#")]),t._v(" uriResolver")]),t._v(" "),e("p",[t._v("By default "),e("code",[t._v("uriResolver")]),t._v(" is undefined and relies on the embedded uriResolver "),e("a",{attrs:{href:"https://github.com/fastify/fast-uri",target:"_blank",rel:"noopener noreferrer"}},[t._v("fast-uri"),e("OutboundLink")],1),t._v(". Pass an object that satisfies the interface "),e("a",{attrs:{href:"https://github.com/ajv-validator/ajv/blob/master/lib/types/index.ts",target:"_blank",rel:"noopener noreferrer"}},[t._v("UriResolver"),e("OutboundLink")],1),t._v(" to be used in replacement. 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keywords",slug:"compound-keywords"},{level:3,title:"not",slug:"not"},{level:3,title:"oneOf",slug:"oneof"},{level:3,title:"anyOf",slug:"anyof"},{level:3,title:"allOf",slug:"allof"},{level:3,title:"if/then/else",slug:"if-then-else"},{level:2,title:"Metadata keywords",slug:"metadata-keywords"}]},{title:"JSON Type Definition",frontmatter:{},regularPath:"/json-type-definition.html",relativePath:"json-type-definition.md",key:"v-8de1af1a",path:"/json-type-definition.html",headers:[{level:2,title:"JTD schema forms",slug:"jtd-schema-forms"},{level:3,title:"Type form",slug:"type-form"},{level:3,title:"Enum form",slug:"enum-form"},{level:3,title:"Elements form",slug:"elements-form"},{level:3,title:"Properties form",slug:"properties-form"},{level:3,title:"Discriminator form",slug:"discriminator-form"},{level:3,title:"Values form",slug:"values-form"},{level:3,title:"Ref form",slug:"ref-form"},{level:3,title:"Empty form",slug:"empty-form"},{level:2,title:"JTDSchemaType",slug:"jtdschematype"},{level:3,title:"Most Schemas",slug:"most-schemas"},{level:3,title:"Ref Schemas",slug:"ref-schemas"},{level:3,title:"Notable Omissions",slug:"notable-omissions"},{level:2,title:"Extending JTD",slug:"extending-jtd"},{level:3,title:"Metadata schema member",slug:"metadata-schema-member"},{level:3,title:"Union keyword",slug:"union-keyword"},{level:3,title:"User-defined keywords",slug:"user-defined-keywords"},{level:2,title:"Validation errors",slug:"validation-errors"}]},{frontmatter:{},regularPath:"/license.html",relativePath:"license.md",key:"v-1f38ca2e",path:"/license.html"},{title:"Mozilla MOSS grant and OpenJS Foundation",frontmatter:{news:!0,title:"Mozilla MOSS grant and OpenJS Foundation",date:"2020-08-14T00:00:00.000Z"},regularPath:"/news/2020-08-14-mozilla-grant-openjs-foundation.html",relativePath:"news/2020-08-14-mozilla-grant-openjs-foundation.md",key:"v-1dfe032e",path:"/news/2020-08-14-mozilla-grant-openjs-foundation.html",excerpt:'

\n

Ajv has been awarded a grant from Mozilla’s Open Source Support (MOSS) program in the “Foundational Technology” track! It will sponsor the development of Ajv support of JSON Schema version 2019-09 and of JSON Type Definition (RFC8927).

\n

Ajv also joined OpenJS Foundation – having this support will help ensure the longevity and stability of Ajv for all its users.

\n'},{title:"User defined keywords",frontmatter:{},regularPath:"/keywords.html",relativePath:"keywords.md",key:"v-48953121",path:"/keywords.html",headers:[{level:2,title:"Common attributes of keyword definitions",slug:"common-attributes-of-keyword-definitions"},{level:3,title:"Define keyword with code generation function",slug:"define-keyword-with-code-generation-function"},{level:3,title:'Define keyword with "validate" function',slug:"define-keyword-with-validate-function"},{level:3,title:'Define keyword with "compile" function',slug:"define-keyword-with-compile-function"},{level:3,title:'Define keyword with "macro" function',slug:"define-keyword-with-macro-function"},{level:2,title:"Schema compilation context",slug:"schema-compilation-context"},{level:2,title:"Validation time variables",slug:"validation-time-variables"},{level:2,title:"Reporting errors",slug:"reporting-errors"}]},{title:"Ajv version 7 is released!",frontmatter:{news:!0,title:"Ajv version 7 is released!",date:"2020-12-15T00:00:00.000Z"},regularPath:"/news/2020-12-15-ajv-version-7-released.html",relativePath:"news/2020-12-15-ajv-version-7-released.md",key:"v-27531941",path:"/news/2020-12-15-ajv-version-7-released.html",excerpt:'

Ajv version 7 has these new features:

\n\n'},{title:"Ajv version 8 is released!",frontmatter:{news:!0,title:"Ajv version 8 is released!",date:"2021-03-27T00:00:00.000Z"},regularPath:"/news/2021-03-27-ajv-version-8-released.html",relativePath:"news/2021-03-27-ajv-version-8-released.md",key:"v-c918a5fa",path:"/news/2021-03-27-ajv-version-8-released.html",excerpt:'

Ajv version 8 has these new features:

\n\n'},{title:"Ajv supports JSON Type Definition",frontmatter:{news:!0,title:"Ajv supports JSON Type Definition",date:"2021-03-07T00:00:00.000Z"},regularPath:"/news/2021-03-07-ajv-supports-json-type-definition.html",relativePath:"news/2021-03-07-ajv-supports-json-type-definition.md",key:"v-67c77489",path:"/news/2021-03-07-ajv-supports-json-type-definition.html",excerpt:'

JSON Type Definition (JTD) is a new specification for defining JSON structures that is very simple to use, comparing with JSON Schema, less error prone, and it is published as RFC8927.

\n

See Choosing schema language for a detailed comparison between JSON Schema and JSON Type definition and informal specification.

\n'},{title:"Ajv online event - May 20, 10am PT / 6pm UK",frontmatter:{news:!0,title:"Ajv online event - May 20, 10am PT / 6pm UK",date:"2021-04-24T00:00:00.000Z",more:!1},regularPath:"/news/2021-04-24-ajv-online-event.html",relativePath:"news/2021-04-24-ajv-online-event.md",key:"v-5a94ae89",path:"/news/2021-04-24-ajv-online-event.html",excerpt:'

We will talk about:

\n
    \n
  • new features of Ajv version 8.
    • \n
  • the improvements sponsored by Mozilla\'s MOSS grant.
    • \n
  • how Ajv is used in JavaScript applications.
    • \n
\n

Speakers:

\n
    \n
  • Evgeny Poberezkin, the creator of Ajv.
    • \n
  • Mehan Jayasuriya, Program Officer at Mozilla Foundation, leading the MOSS and other programs investing in the open source and community ecosystems.
    • \n
  • Matteo Collina, Technical Director at NearForm and Node.js Technical Steering Committee member, creator of Fastify web framework.
    • \n
  • Kin Lane, Chief Evangelist at Postman. Studying the tech, business & politics of APIs since 2010. Presidential Innovation Fellow during the Obama administration.
    • \n
  • Ulysse Carion, the creator of JSON Type Definition specification.
    • \n
\n

Gajus Kuizinas will host the event.

\n

Please register here.

\n'},{title:"Ajv online event video uploaded",frontmatter:{news:!0,title:"Ajv online event video uploaded",date:"2021-05-24T00:00:00.000Z",more:!1},regularPath:"/news/2021-05-24-ajv-online-event-video.html",relativePath:"news/2021-05-24-ajv-online-event-video.md",key:"v-2abeb1ab",path:"/news/2021-05-24-ajv-online-event-video.html",excerpt:'

Huge thanks to everybody who joined, and to the speakers! The video of the event is available on YouTube.

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- + diff --git a/guide/getting-started.html b/guide/getting-started.html index 841ac9bbc..ed251864a 100644 --- a/guide/getting-started.html +++ b/guide/getting-started.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator
- + diff --git a/guide/managing-schemas.html b/guide/managing-schemas.html index 8dcc08ac9..cdf8d0dd5 100644 --- a/guide/managing-schemas.html +++ b/guide/managing-schemas.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator

# Managing schemas

# Re-using validation functions

Ajv validation model is optimized for server side execution, when schema compilation happens only once and validation happens multiple times - this has a substantial performance benefit comparing with validators that interpret the schema in the process of validation.

Transition from template-based code generation in Ajv v6 to the tree-based in v7 brought:

  • type-level safety against code injection via untrusted schemas
  • more efficient validation code (via tree optimizations)
  • smaller memory footprint of compiled functions (schemas are no longer serialized)
  • smaller bundle size
  • more maintainable code

These improvements cost slower schema compilation, and increased chance of re-compilation in case you pass a different schema object (see #1413 (opens new window)), so it is very important to manage schemas correctly, so they are only compiled once.

There are several approaches to manage compiled schemas.

# Standalone validation code

The motivation to pre-compile schemas:

  • faster startup times
  • lower memory footprint/bundle size
  • compatible with strict content security policies
  • almost no risk to compile schema more than once
  • better for short-lived environments

See Standalone validation code for the details.

There are scenarios when it can be not possible or difficult:

  • dynamic or user-provided schemas - while you can do caching, it can be either difficult to implement or inefficient.
  • user-defined keywords that use closures that are difficult to serialize as code.

# Compiling during initialization

The simplest approach is to compile all your schemas when the application starts, outside of the code that handles requests. It can be done simply in the module scope:

Use single Ajv instance

It recommended to use a single Ajv instance for the whole application, so if you use validation in more than one module, you should:

  • require Ajv in a separate module responsible for validation
  • compile all validators there
  • export them to be used in multiple modules of your application

# Using Ajv instance cache

Another, more effective approach, is to use Ajv instance cache to have all compiled validators available anywhere in your application from a single import.

In this case you would have a separate module where you instantiate Ajv and use this instance in your application.

You can load all schemas and add them to Ajv instance in a single validation module:

And then you can import Ajv instance and access any schema in any application module, for example user module:

On-demand vs preliminary compilation

In the example above, schema compilation happens only once, on the first API call, not at the application start-up time. It means that the application would start a bit faster, but the first API call would be a bit slower. If this is undesirable, you could, for example, call getSchema for all added schemas after they are added, then when getSchema is called inside route handler it would simply get compiled validation function from the instance cache.

# Cache key: schema vs key vs $id

In the example above, the key passed to the addSchema method was used to retrieve schemas from the cache. Other options are:

  • use schema root $id attribute. While it usually looks like URI, it does not mean Ajv downloads it from this URI - this is simply $id used to identify and access the schema. You can though configure Ajv to download schemas on demand - see Asynchronous schema loading
  • use schema object itself as a key to the cache (it is possible, because Ajv uses Map). This approach is not recommended, because it would only work if you pass the same instance of the schema object that was passed to addSchema method - it is easy to make a mistake that would result in schema being compiled every time it is used.

# Pre-adding all schemas vs adding on demand

In the example above all schemas were added in advance. It is also possible, to add schemas as they are used - it can be helpful if there is many schemas. In this case, you need to check first whether the schema is already added by calling getSchema method - it would return undefined if not:

const schema_user = require("./schema_user.json")
+

# Managing schemas

# Re-using validation functions

Ajv validation model is optimized for server side execution, when schema compilation happens only once and validation happens multiple times - this has a substantial performance benefit comparing with validators that interpret the schema in the process of validation.

Transition from template-based code generation in Ajv v6 to the tree-based in v7 brought:

  • type-level safety against code injection via untrusted schemas
  • more efficient validation code (via tree optimizations)
  • smaller memory footprint of compiled functions (schemas are no longer serialized)
  • smaller bundle size
  • more maintainable code

These improvements cost slower schema compilation, and increased chance of re-compilation in case you pass a different schema object (see #1413 (opens new window)), so it is very important to manage schemas correctly, so they are only compiled once.

There are several approaches to manage compiled schemas.

# Standalone validation code

The motivation to pre-compile schemas:

  • faster startup times
  • lower memory footprint/bundle size
  • compatible with strict content security policies
  • almost no risk to compile schema more than once
  • better for short-lived environments

See Standalone validation code for the details.

There are scenarios when it can be not possible or difficult:

  • dynamic or user-provided schemas - while you can do caching, it can be either difficult to implement or inefficient.
  • user-defined keywords that use closures that are difficult to serialize as code.

# Compiling during initialization

The simplest approach is to compile all your schemas when the application starts, outside of the code that handles requests. It can be done simply in the module scope:

Use single Ajv instance

It recommended to use a single Ajv instance for the whole application, so if you use validation in more than one module, you should:

  • require Ajv in a separate module responsible for validation
  • compile all validators there
  • export them to be used in multiple modules of your application

# Using Ajv instance cache

Another, more effective approach, is to use Ajv instance cache to have all compiled validators available anywhere in your application from a single import.

In this case you would have a separate module where you instantiate Ajv and use this instance in your application.

You can load all schemas and add them to Ajv instance in a single validation module:

And then you can import Ajv instance and access any schema in any application module, for example user module:

On-demand vs preliminary compilation

In the example above, schema compilation happens only once, on the first API call, not at the application start-up time. It means that the application would start a bit faster, but the first API call would be a bit slower. If this is undesirable, you could, for example, call getSchema for all added schemas after they are added, then when getSchema is called inside route handler it would simply get compiled validation function from the instance cache.

# Cache key: schema vs key vs $id

In the example above, the key passed to the addSchema method was used to retrieve schemas from the cache. Other options are:

  • use schema root $id attribute. While it usually looks like URI, it does not mean Ajv downloads it from this URI - this is simply $id used to identify and access the schema. You can though configure Ajv to download schemas on demand - see Asynchronous schema loading
  • use schema object itself as a key to the cache (it is possible, because Ajv uses Map). This approach is not recommended, because it would only work if you pass the same instance of the schema object that was passed to addSchema method - it is easy to make a mistake that would result in schema being compiled every time it is used.

# Pre-adding all schemas vs adding on demand

In the example above all schemas were added in advance. It is also possible, to add schemas as they are used - it can be helpful if there are many schemas. In this case, you need to check first whether the schema is already added by calling getSchema method - it would return undefined if not:

const schema_user = require("./schema_user.json")
 let validate = ajv.getSchema("user")
 if (!validate) {
   ajv.addSchema(schema_user, "user")
@@ -208,6 +208,6 @@
       
       →
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Ajv JSON schema validator
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Ajv JSON schema validator
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All news

# Who uses Ajv

eslint (opens new window) stoplight (opens new window) webpack (opens new window) table (opens new window) fastify (opens new window) restbase (opens new window) objection.js (opens new window) Taskcluster (opens new window) RxDB (opens new window) react-jsonschema-form (opens new window) autorest (opens new window) node-red (opens new window) MDN (opens new window) quicktype (opens new window) vue-form-generator (opens new window) teambit (opens new window) React Page (opens new window) Backstage (opens new window) rushstack (opens new window) JupyterLab (opens new window) 0x (opens new window) Plank.js (opens new window) fast (opens new window) netlify cms (opens new window) ng-alain (opens new window) Vercel (opens new window) AWS Amplify (opens new window) FB flipper (opens new window) nx.dev (opens new window) express gateway (opens new window) zigbee2mqtt (opens new window) dependency-cruiser (opens new window) theia (opens new window) TSDoc (opens new window) webhint (opens new window) Vega-Lite (opens new window) middy (opens new window) JSDoc (opens new window) Ts.ED (opens new window)

# Contributors

Ajv is free to use and open-source that many developers contributed to. Join us!

epoberezkin - + spaced4ndy - + erikbrinkman - + jasoniangreen - + dependabot[bot] - + PBug90 - + blakeembrey - + sambauers - + gajus - + meirotstein - + Tyharo1 - + igor-savin-ht - + b4h0-c4t - + willfarrell - + boenrobot - + yume-chan - + GrahamLea - + franciscomorais - + asaid-0 - + domoritz - + imbstack - + pithu - + realityking - + efebarlas - + awlayton - + pcwiek - + rehanvdm - + farrago - + SoAsEr - + kroky - + Delagen - + YChebotaev - + bhvngt - + t7yang - + teq0 - + wuweiss - + zekth - + egfx-notifications - + brendo - + HotelDon - + donaldpipowitch - + mummybot - + G-Rath - + HolgerJeromin - + Nonemoticoner - + MichaelDeBoey - + mattpolzin - + monkeywithacupcake - + ktrueda - + marshall007 - + lucassaid - - caub - + + mxsgx + philsturgeon - + carlo-quinonez - + radekmie - + merlindorin - + Romakita - + rbuckton - + ryanmeador - + mighty1231 - + simon04 - + SirLich - + krenor - + stuartpb - + TIBCOeddie - + bearmini - + not-an-aardvark - - mxsgx - + m00s - + mbroadst - + MattiAstedrone - + MikeRalphson - + tyok - + MrJithil - + mychaelgo - + natflow - + nwoltman - + + blottn + nimerritt - + nicksrandall - + Noam3kCH - + eventlistener - + Opticsponge - + orgads - + papb - + thernstig - + jsdevel - + oldmud0 - + ossdev07 - + pskfyi - + qwertyforce - + rek - + sahilda - + schokotets - + superfaz - + tridium - + vlbee - + aladdin-add - + wyfo - + duxing - + anchnk - + ChALkeR - + TommyDew42 - + koba04 - + isTravis - + cvlab - + vargaeric - + villasv - + aristov - + billytrend - + byr-gdp - + cjancsar - + dfeufel - + ehmicky - + fpicalausa - + franrolando - + fridays - + jonganc - + + caub + dalcib - + dannyb648 - + dancasey - + rotu - + FunkyDck - + darcyparker - + daveisfera - + dsanders11 - + Delapouite - + dimitropoulos - + keyten - + thetric - + rubiagatra - + forivall - + ecwyne - + jonathanGB - + ahmdsolmn - + Alexsey - + avanelli - + anslzo - + asprouse - + andyscott - + vixalien - + kulakowka - + vendeza - + benasher44 - + bradjones1 - + eventualbuddha - + cbrwflo - + cpillsbury - + ChuntaoLu - + delavara - + smithc10 - + jboavida - + justinpowers - + kapouer - + lehni - + platinumazure - + kpping - + laurens - + johanlelan - + leonardovillela - + LinusU - + alazyzombie - + jsbrain - + Eomm - + VIEWVIEWVIEW - + mduu - + dzuremar - + EtaiG - + gj - + rgeerts - + garrows - + gurgunday - + hadrien-toma - + seriousme - + hans-kinnek - + handrews - + is2ei - + idangozlan - + ivansieder - + P0lip - + JamesJansson - + mrjgreen - + jrr jonasfj

ajv

Learn Ajv

Reference

Security

JSON Schema

JSON Type Definition

Contributing

mozilla (opens new window) reserved (opens new window)

© 2015-2021 | Ajv JSON schema validator | ajv.validator@gmail.com

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Ajv JSON schema validator
- + diff --git a/json-type-definition.html b/json-type-definition.html index 6cd9b1a3c..f23bec4b5 100644 --- a/json-type-definition.html +++ b/json-type-definition.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator
- + diff --git a/keywords.html b/keywords.html index 6fba86138..f039cdfed 100644 --- a/keywords.html +++ b/keywords.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator
- + diff --git a/license.html b/license.html index 3fa2c3d8f..b3ebeeb2f 100644 --- a/license.html +++ b/license.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator
- + diff --git a/news/2020-08-14-mozilla-grant-openjs-foundation.html b/news/2020-08-14-mozilla-grant-openjs-foundation.html index c4ca9e898..1e077c803 100644 --- a/news/2020-08-14-mozilla-grant-openjs-foundation.html +++ b/news/2020-08-14-mozilla-grant-openjs-foundation.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator

Mozilla MOSS grant and OpenJS Foundation

(opens new window) (opens new window)

Ajv has been awarded a grant from Mozilla’s Open Source Support (MOSS) program (opens new window) in the “Foundational Technology” track! It will sponsor the development of Ajv support of JSON Schema version 2019-09 (opens new window) and of JSON Type Definition (RFC8927) (opens new window).

Ajv also joined OpenJS Foundation (opens new window) – having this support will help ensure the longevity and stability of Ajv for all its users.

This blog post (opens new window) has more details.

I am looking for the long term maintainers of Ajv – working with ReadySet (opens new window), also sponsored by Mozilla, to establish clear guidelines for the role of a "maintainer" and the contribution standards, and to encourage a wider, more inclusive, contribution from the community.

- + diff --git a/news/2020-12-15-ajv-version-7-released.html b/news/2020-12-15-ajv-version-7-released.html index 798efc8f4..0fa976e5f 100644 --- a/news/2020-12-15-ajv-version-7-released.html +++ b/news/2020-12-15-ajv-version-7-released.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator

Ajv version 7 has these new features:

Please note:

  • the support for JSON-Schema draft-04 is removed - if you have schemas using "id" attributes you have to replace them with "$id" (or continue using Ajv v6 (opens new window) that will be supported until 02/28/2021).
  • all formats are separated to ajv-formats package - they have to be explicitly added if you use them.

See release notes (opens new window) for the details.

To install the new version:

npm install ajv

See Getting started for code examples.

- + diff --git a/news/2021-03-07-ajv-supports-json-type-definition.html b/news/2021-03-07-ajv-supports-json-type-definition.html index 000da26c5..03c62f840 100644 --- a/news/2021-03-07-ajv-supports-json-type-definition.html +++ b/news/2021-03-07-ajv-supports-json-type-definition.html @@ -18,8 +18,8 @@ - - + +
Ajv JSON schema validator

Ajv supports JSON Type Definition

JSON Type Definition (JTD) is a new specification for defining JSON structures that is very simple to use, comparing with JSON Schema, less error prone, and it is published as RFC8927 (opens new window).

See Choosing schema language for a detailed comparison between JSON Schema and JSON Type definition and informal specification.

In addition to validation, Ajv also supports:

  • generation of serializers and parsers from JTD schemas/ This is more efficient than native JSON serialization/parsing - you can combine JSON string parsing and validation in one function call.
  • utility type JTDSchemaType to convert your data type to the type of JTD schema and JTDDataType to convert the type of schema to the type of data.
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Ajv version 8 has these new features:

See release notes (opens new window) for the details.

To install the new version:

npm install ajv

See Getting started for code examples.

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Ajv JSON schema validator

Ajv online event - May 20, 10am PT / 6pm UK

We will talk about:

  • new features of Ajv version 8.
  • the improvements sponsored by Mozilla's MOSS grant.
  • how Ajv is used in JavaScript applications.

Speakers:

Gajus Kuizinas (opens new window) will host the event.

Please register here (opens new window).

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Ajv JSON schema validator

Microsoft FOSS award

Ajv was awarded a sponsorship from Microsoft FOSS fund (opens new window) - huge thanks to Microsoft and the engineers who voted to support Ajv development.

This award will contribute to a long term maintenance of Ajv.

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