Example blog with posts and comments

[loongmxbt]

Could you please give a detailed example blog having comments related to a post?

The comments_list and comment_create templates are at front-end in post page, and I can also see the comments I submitted at admin panel -> comments entity -> index page.

Another problem is that for different entities, such as posts and resources, I want to have a unified comments functionality related to them, how can I do that? And can you give an example for that? Thanks a lot!

[nicolaslopezj]

Not all collections must be entities, entities should only be the ones that are editable in the admin.
So, lets start:

Declare the collection

Comments = new Mongo.Collection('comments');
Comments.attachSchema(new SimpleSchema({
    content: {
        type: String,
        autoform: {
            label: false,
            placeholder: 'Message'
        }
    },
    postId: {
        type: String,
    },
    createdAt: {
        type: Date,
        autoValue: function() {
            return new Date;
        }
    },
    createdBy: {
        type: String,
        autoValue: function() {
            return this.userId;
        }
    }
}));

Create the publication

Meteor.publish('commentsForPost', function (postId) {
    return Comments.find({ postId: postId });
});

Use template level subscriptions to subscribe to the comments

Template.post.onRendered(function() {
    this.subscribe('commentsForPost', this.data._id)
})

Create the template helper to fetch the comments

Template.post.helpers({
    comments: function () {
        return Comments.find({ postId: this._id }, { sort: { createdAt: -1 } });
    }
});

Put them in the html code

<template name="post">
    ...
    {{# each comments }}
        <p><b>{{ getUserName }}</b></p>
        <p>{{ content }}</p>
        <p>{{ timeago createdAt }}</p>
    {{/ each }}
</template>

Create the form and with it event

Template.post.events({
    'click .comment-btn': function () {
        Comments.insert({ postId: this._id, content: $(".comment-content").val() });
    }
});

If you have any questions you can ask

[loongmxbt]

The remind "Not all collections must be entities, entities should only be the ones that are editable in the admin." really helps a lot!

[loongmxbt]

Another question maybe not directly related to orion, that is how to define dynamic Schema (form)?

For example, in my resource_create template, I want to do the following:
If I choose resource type movie, I want to have fields like IMDB_link, director, characters and so on.
If I choose resource type series, I want to have fields like season, number and so on.
And use these fields to combine a final resource title.

Which means in MongoDB, I'd like to store resources with different schema (minor difference) in one collection. How could I do that if I assign SimpleSchema?

[nicolaslopezj]

Thats completely aldeed/meteor-simple-schema. Maybe you can make the dynamic values optional depending if a Boolean "isMovie"

[loongmxbt]

I found this https://github.com/orionjs/tutorials/blob/master/tutorials/custom_entity_templates.md useful to this case.