@bigtest/mirage/tests/integration/orm/belongs-to/9-one-way-polymorphic/_helper.js

A client-side server to develop, test and prototype your app.

import { Schema, Db, Model, belongsTo } from '@bigtest/mirage';

/*
  A model with a belongsTo association can be in six states
  with respect to its association. This helper class
  returns a child (and its association) in these various states.

  The return value is an array of the form

    [ child, parent ]

  where the parent may be undefined.
*/
export default class BelongsToHelper {
  constructor() {
    this.db = new Db();
    this.loadData = this.db.loadData.bind(this.db);

    this.schema = new Schema(this.db, {
      post: Model.extend(),
      comment: Model.extend({
        commentable: belongsTo('commentable', { polymorphic: true })
      })
    });
  }

  savedChildNoParent() {
    let insertedComment = this.db.comments.insert({ text: 'Lorem' });

    return [ this.schema.comments.find(insertedComment.id), undefined ];
  }

  savedChildNewParent() {
    this.loadData({
      comments: [
        { id: '1', text: 'Lorem' }
      ]
    });

    let comment = this.schema.comments.find(1);
    let post = this.schema.posts.new({ title: 'Bob' });

    comment.commentable = post;

    return [ comment, post ];
  }

  savedChildSavedParent() {
    this.loadData({
      posts: [
        { id: '1', title: 'Lorem ipsum' }
      ],
      comments: [
        { id: '1', text: 'Trolling', commentableId: { id: '1', type: 'post' } }
      ]
    });

    let comment = this.schema.comments.find(1);
    let post = this.schema.posts.find(1);

    return [ comment, post ];
  }

  newChildNoParent() {
    return [ this.schema.comments.new({ text: 'Lorem' }), undefined ];
  }

  newChildNewParent() {
    let comment = this.schema.comments.new({ text: 'Lorem' });
    let newPost = this.schema.posts.new({ title: 'Bob' });
    comment.commentable = newPost;

    return [ comment, newPost ];
  }

  newChildSavedParent() {
    this.loadData({
      posts: [
        { id: '1', title: 'Lorem ipsum' }
      ]
    });
    let comment = this.schema.comments.new({ text: 'Lorem' });
    let savedPost = this.schema.posts.find(1);

    comment.commentable = savedPost;

    return [ comment, savedPost ];
  }

  // Just a saved unassociated parent.
  savedParent() {
    let insertedPost = this.db.posts.insert({ title: 'Bob' });

    return this.schema.posts.find(insertedPost.id);
  }

  newParent() {
    return this.schema.posts.new({ title: 'Bob' });
  }
}

export const states = [
  'savedChildNoParent',
  'savedChildNewParent',
  'savedChildSavedParent',
  'newChildNoParent',
  'newChildNewParent',
  'newChildSavedParent'
];