Merge pull request #84 from tomhoule/introspection-query-bug

Fix issues from #83

.travis.yml

@@ -2,7 +2,7 @@ language: rust
 rust:
   - stable
   - beta
-  - nightly
+  # - nightly
 cache: cargo
 before_script:
   - if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then (rustup component add rustfmt-preview clippy-preview) fi

CHANGELOG.md

@@ -7,11 +7,18 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## Unreleased
 
+There are a number of breaking new features, read the `Added` section attentively if you are upgrading.
+
 ### Added
 
 - (breaking) Control over which types custom scalars deserialize to is given to the user: you now have to provide type aliases for the custom scalars in the scope of the struct under derive.
 - (breaking) Support for multi-operations documents. You can select a particular operation by naming the struct under derive after it. In case there is no match, we revert to the current behaviour: select the first operation.
-- Support arbitrary derives on the generated response types via the `response_derives` option on the `graphql` attribute.
+- (breaking) Support arbitrary derives on the generated response types via the `response_derives` option on the `graphql` attribute. If you were relying on the `Debug` impl on generated structs before, you need to add `response_derives = "Debug"` in the `#[graphql()]` attributes in your structs.
+
+### Fixed
+
+- Fixed codegen of fields with leading underscores - they were ignored, leading to wrong derived types for deserialization.
+- Made the CLI dump introspected schemas directly without trying to validate them.
 
 ## [0.3.0] - 2018-07-24
 

README.md

@@ -62,10 +62,12 @@ A typed GraphQL client library for Rust.
   extern crate graphql_client;
   extern crate reqwest;
 
+  use graphql_client::{GraphQLQuery, GraphQLResponse};
+
   fn perform_my_query(variables: &my_query::Variables) -> Result<(), failure::Error> {
 
       // this is the important line
-      let request_body = MyQuery::expand(variables);
+      let request_body = MyQuery::build_query(variables);
 
       let client = reqwest::Client::new();
       let mut res = client.post("/graphql").json(&request_body).send()?;

graphql_client_cli/src/main.rs

@@ -16,7 +16,7 @@ use structopt::StructOpt;
 #[graphql(
     schema_path = "src/introspection_schema.graphql",
     query_path = "src/introspection_query.graphql",
-    response_derives = "Serialize",
+    response_derives = "Serialize"
 )]
 struct IntrospectionQuery;
 
@@ -86,10 +86,6 @@ fn introspect_schema(location: String, output: Option<PathBuf>) -> Result<(), fa
         println!("Something else happened. Status: {:?}", res.status());
     }
 
-    let json: graphql_client::GraphQLResponse<introspection_query::ResponseData> = res.json()?;
-    let json = serde_json::to_string(&json)?;
-
-    write!(out, "{}", json)?;
-
-    Ok(())
+    let json: serde_json::Value = res.json()?;
+    Ok(serde_json::to_writer_pretty(out, &json)?)
 }

graphql_query_derive/src/codegen.rs

@@ -132,7 +132,6 @@ pub(crate) fn response_for_query(
         #variables_struct
 
         #response_derives
-        #[serde(rename_all = "camelCase")]
         pub struct ResponseData {
             #(#response_data_fields,)*
         }

graphql_query_derive/src/inputs.rs

@@ -22,13 +22,16 @@ impl GqlInput {
         fields.sort_unstable_by(|a, b| a.name.cmp(&b.name));
         let fields = fields.iter().map(|field| {
             let ty = field.type_.to_rust(&context, "");
-            let name = Ident::new(&field.name.to_snake_case(), Span::call_site());
-            quote!(pub #name: #ty)
+            let original_name = &field.name;
+            let snake_case_name = field.name.to_snake_case();
+            let rename = ::shared::field_rename_annotation(&original_name, &snake_case_name);
+            let name = Ident::new(&snake_case_name, Span::call_site());
+
+            quote!(#rename pub #name: #ty)
         });
 
         Ok(quote! {
             #[derive(Debug, Serialize)]
-            #[serde(rename_all = "camelCase")]
             pub struct #name {
                 #(#fields,)*
             }
@@ -132,9 +135,9 @@ mod tests {
 
         let expected: String = vec![
             "# [ derive ( Debug , Serialize ) ] ",
-            "# [ serde ( rename_all = \"camelCase\" ) ] ",
             "pub struct Cat { ",
             "pub offsprings : Vec < Cat > , ",
+            "# [ serde ( rename = \"pawsCount\" ) ] ",
             "pub paws_count : Float , ",
             "pub requirements : Option < CatRequirements > , ",
             "}",

graphql_query_derive/src/objects.rs

@@ -76,7 +76,6 @@ impl GqlObject {
             #(#field_impls)*
 
             #derives
-            #[serde(rename_all = "camelCase")]
             #description
             pub struct #name {
                 #(#fields,)*

graphql_query_derive/src/operations.rs

@@ -50,8 +50,11 @@ impl Operation {
         let fields = variables.iter().map(|variable| {
             let name = &variable.name;
             let ty = variable.ty.to_rust(context, "");
-            let name = Ident::new(&name.to_snake_case(), Span::call_site());
-            quote!(pub #name: #ty)
+            let snake_case_name = name.to_snake_case();
+            let rename = ::shared::field_rename_annotation(&name, &snake_case_name);
+            let name = Ident::new(&snake_case_name, Span::call_site());
+
+            quote!(#rename pub #name: #ty)
         });
 
         let default_constructors = variables
@@ -60,7 +63,6 @@ impl Operation {
 
         quote! {
             #[derive(Serialize)]
-            #[serde(rename_all = "camelCase")]
             pub struct Variables {
                 #(#fields,)*
             }

graphql_query_derive/src/shared.rs

@@ -20,9 +20,11 @@ pub(crate) fn render_object_field(
         };
     }
 
-    let name_ident = Ident::new(&field_name.to_snake_case(), Span::call_site());
+    let snake_case_name = field_name.to_snake_case();
+    let rename = ::shared::field_rename_annotation(&field_name, &snake_case_name);
+    let name_ident = Ident::new(&snake_case_name, Span::call_site());
 
-    quote!(#description pub #name_ident: #field_type)
+    quote!(#description #rename pub #name_ident: #field_type)
 }
 
 pub(crate) fn field_impls_for_selection(
@@ -96,3 +98,14 @@ pub(crate) fn response_fields_for_selection(
             }
         }).collect()
 }
+
+/// Given the GraphQL schema name for an object/interface/input object field and
+/// the equivalent rust name, produces a serde annotation to map them during
+/// (de)serialization if it is necessary, otherwise an empty TokenStream.
+pub(crate) fn field_rename_annotation(graphql_name: &str, rust_name: &str) -> TokenStream {
+    if graphql_name != rust_name {
+        quote!(#[serde(rename = #graphql_name)])
+    } else {
+        quote!()
+    }
+}

graphql_query_derive/src/unions.rs

@@ -150,7 +150,7 @@ mod tests {
             SelectionItem::InlineFragment(SelectionInlineFragment {
                 on: "User".to_string(),
                 fields: Selection(vec![SelectionItem::Field(SelectionField {
-                    name: "first_name".to_string(),
+                    name: "firstName".to_string(),
                     fields: Selection(vec![]),
                 })]),
             }),
@@ -178,17 +178,17 @@ mod tests {
                 fields: vec![
                     GqlObjectField {
                         description: None,
-                        name: "first_name".to_string(),
+                        name: "firstName".to_string(),
                         type_: FieldType::Named(Ident::new("String", Span::call_site())),
                     },
                     GqlObjectField {
                         description: None,
-                        name: "last_name".to_string(),
+                        name: "lastName".to_string(),
                         type_: FieldType::Named(Ident::new("String", Span::call_site())),
                     },
                     GqlObjectField {
                         description: None,
-                        name: "created_at".to_string(),
+                        name: "createdAt".to_string(),
                         type_: FieldType::Named(Ident::new("Date", Span::call_site())),
                     },
                 ],
@@ -235,7 +235,7 @@ mod tests {
             SelectionItem::InlineFragment(SelectionInlineFragment {
                 on: "User".to_string(),
                 fields: Selection(vec![SelectionItem::Field(SelectionField {
-                    name: "first_name".to_string(),
+                    name: "firstName".to_string(),
                     fields: Selection(vec![]),
                 })]),
             }),
@@ -272,17 +272,17 @@ mod tests {
                     },
                     GqlObjectField {
                         description: None,
-                        name: "first_name".to_string(),
+                        name: "firstName".to_string(),
                         type_: FieldType::Named(string_type()),
                     },
                     GqlObjectField {
                         description: None,
-                        name: "last_name".to_string(),
+                        name: "lastName".to_string(),
                         type_: FieldType::Named(string_type()),
                     },
                     GqlObjectField {
                         description: None,
-                        name: "created_at".to_string(),
+                        name: "createdAt".to_string(),
                         type_: FieldType::Named(Ident::new("Date", Span::call_site())),
                     },
                 ],
@@ -307,7 +307,7 @@ mod tests {
                     },
                     GqlObjectField {
                         description: None,
-                        name: "created_at".to_string(),
+                        name: "createdAt".to_string(),
                         type_: FieldType::Named(Ident::new("Date", Span::call_site())),
                     },
                 ],
@@ -324,16 +324,14 @@ mod tests {
             result.unwrap().to_string(),
             vec![
                 "# [ derive ( Deserialize ) ] ",
-                "# [ serde ( rename_all = \"camelCase\" ) ] ",
-                "pub struct MeowOnUser { pub first_name : String , } ",
+                "pub struct MeowOnUser { # [ serde ( rename = \"firstName\" ) ] pub first_name : String , } ",
                 "# [ derive ( Deserialize ) ] ",
-                "# [ serde ( rename_all = \"camelCase\" ) ] ",
                 "pub struct MeowOnOrganization { pub title : String , } ",
                 "# [ derive ( Deserialize ) ] ",
                 "# [ serde ( tag = \"__typename\" ) ] ",
                 "pub enum Meow { User ( MeowOnUser ) , Organization ( MeowOnOrganization ) }",
             ].into_iter()
-            .collect::<String>(),
+                .collect::<String>(),
         );
     }
 }

tests/introspection.rs

@@ -3,11 +3,13 @@ extern crate graphql_client;
 #[macro_use]
 extern crate serde_derive;
 extern crate serde;
+extern crate serde_json;
 
 #[derive(GraphQLQuery)]
 #[graphql(
     query_path = "tests/introspection/introspection_query.graphql",
     schema_path = "tests/introspection/introspection_schema.graphql",
+    response_derives = "Debug,PartialEq"
 )]
 #[allow(dead_code)]
 struct IntrospectionQuery;
@@ -16,3 +18,14 @@ struct IntrospectionQuery;
 fn introspection_schema() {
     ()
 }
+
+const INTROSPECTION_RESPONSE: &'static str =
+    include_str!("./introspection/introspection_response.json");
+
+#[test]
+fn leading_underscores_are_preserved() {
+    let deserialized: graphql_client::GraphQLResponse<introspection_query::ResponseData> =
+        serde_json::from_str(INTROSPECTION_RESPONSE).unwrap();
+    assert!(deserialized.data.is_some());
+    assert!(deserialized.data.unwrap().schema.is_some());
+}

tests/introspection/introspection_query.graphql

@@ -1,5 +1,5 @@
 query IntrospectionQuery {
-  __Schema {
+  __schema {
     queryType {
       name
     }