Fix #316 polymorphic create fragment (#483)

* FragmentArray.createFragment should respect `type` in polymorphic arrays #316

* Remove unused test

* Update tests/unit/polymorphic_test.js typo

Co-authored-by: Vincent Molinié <vincentm@forestadmin.com>

* refactor: convert tests to modern syntax

* fix attribute name in test

* fix test failure

* fix FragmentArray property documentation

FragmentArray#type was renamed to modelName
FragmentArray#options are no longer used

* reformat code

* ensure that the fragment owner is set

* add failing test for createRecord

* fix createRecord for polymorphic fragment arrays

---------

Co-authored-by: Stefan Fochler <istefo@me.com>
Co-authored-by: Ilya Radchenko <knownasilya@gmail.com>
Co-authored-by: Vincent Molinié <vincentm@forestadmin.com>

addon/array/fragment.js

@@ -22,13 +22,11 @@ const FragmentArray = StatefulArray.extend({
   /**
     The type of fragments the array contains
 
-    @property type
+    @property modelName
     @private
     @type {String}
   */
-  type: null,
-
-  options: null,
+  modelName: null,
 
   objectAt(index) {
     const recordData = this._super(index);
@@ -55,9 +53,7 @@ const FragmentArray = StatefulArray.extend({
       existing.setProperties(data);
       return recordDataFor(existing);
     }
-    const fragment = this.store.createFragment(this.modelName, data);
-    setFragmentOwner(fragment, this.recordData, this.key);
-    return recordDataFor(fragment);
+    return this.recordData._newFragmentRecordDataForKey(this.key, data);
   },
 
   /**
@@ -142,15 +138,18 @@ const FragmentArray = StatefulArray.extend({
 
   /**
     Creates a new fragment of the fragment array's type and adds it to the end
-    of the fragment array
+    of the fragment array.
 
     @method createFragment
     @param {MF.Fragment} fragment
     @return {MF.Fragment} the newly added fragment
     */
   createFragment(props) {
-    const fragment = this.store.createFragment(this.modelName, props);
-    setFragmentOwner(fragment, this.recordData, this.key);
+    const recordData = this.recordData._newFragmentRecordDataForKey(
+      this.key,
+      props
+    );
+    const fragment = recordData._fragmentGetRecord();
     return this.pushObject(fragment);
   },
 });

addon/record-data.js

@@ -600,6 +600,15 @@ export default class FragmentRecordData extends RecordData {
     this._fragmentOwner = { recordData, key };
   }
 
+  _newFragmentRecordDataForKey(key, attributes) {
+    const behavior = this._fragmentBehavior[key];
+    assert(
+      `Attribute '${key}' for model '${this.modelName}' must be a fragment`,
+      behavior != null
+    );
+    return this._newFragmentRecordData(behavior.definition, attributes);
+  }
+
   _newFragmentRecordData(definition, attributes) {
     const type = getActualFragmentType(
       definition.modelName,

tests/dummy/app/models/animal.js

@@ -1,6 +1,8 @@
 import Fragment from 'ember-data-model-fragments/fragment';
+import { fragmentOwner } from 'ember-data-model-fragments/attributes';
 import { attr } from '@ember-data/model';
 
 export default class Animal extends Fragment {
   @attr('string') name;
+  @fragmentOwner() zoo;
 }

tests/dummy/app/models/component.js

@@ -1,5 +1,5 @@
 import Model, { attr } from '@ember-data/model';
-import { fragment } from 'ember-data-model-fragments/attributes';
+import { fragment, fragmentArray } from 'ember-data-model-fragments/attributes';
 
 export default class Component extends Model {
   @attr('string') name;
@@ -9,4 +9,10 @@ export default class Component extends Model {
     typeKey: (data, owner) => `component-options-${owner.type}`,
   })
   options;
+
+  @fragmentArray('component-options', {
+    polymorphic: true,
+    typeKey: (data, owner) => `component-options-${owner.type}`,
+  })
+  optionsHistory;
 }

tests/unit/polymorphic_test.js

@@ -3,6 +3,7 @@ import { setupApplicationTest } from '../helpers';
 import Animal from 'dummy/models/animal';
 import Lion from 'dummy/models/lion';
 import Elephant from 'dummy/models/elephant';
+import ComponentOptionsText from 'dummy/models/component-options-text';
 let store, zoo;
 
 module('unit - Polymorphism', function (hooks) {
@@ -83,4 +84,127 @@ module('unit - Polymorphism', function (hooks) {
     assert.ok(second instanceof Elephant);
     assert.equal(second.trunkLength, 4, "elephant's trunk length is correct");
   });
+
+  test("fragment array's createFragment supports polymorphism with string typeKey", async function (assert) {
+    store.push({
+      data: {
+        type: 'zoo',
+        id: 1,
+        attributes: zoo,
+      },
+    });
+
+    const record = await store.find('zoo', 1);
+    const animals = record.animals;
+
+    const newLion = animals.createFragment({
+      $type: 'lion',
+      name: 'Alex',
+      hasManes: 'true',
+    });
+
+    assert.ok(newLion instanceof Animal, 'new lion is an animal');
+    assert.equal(newLion.name, 'Alex', "new animal's name is correct");
+    assert.ok(newLion instanceof Lion, 'new lion is a lion');
+    assert.ok(newLion.hasManes, 'lion has manes');
+    assert.strictEqual(newLion.zoo, record, 'set the fragment owner');
+
+    const newElephant = animals.createFragment({
+      $type: 'elephant',
+      name: 'Heffalump',
+      trunkLength: 7,
+    });
+
+    assert.ok(newElephant instanceof Animal, 'new elephant is an animal');
+    assert.equal(newElephant.name, 'Heffalump', "new animal's name is correct");
+    assert.ok(newElephant instanceof Elephant, 'new elephant is an elephant');
+    assert.equal(
+      newElephant.trunkLength,
+      7,
+      "elephant's trunk length is correct"
+    );
+    assert.strictEqual(newElephant.zoo, record, 'set the fragment owner');
+  });
+
+  test("fragment array's createFragment supports polymorphism with function typeKey", async function (assert) {
+    store.push({
+      data: {
+        type: 'component',
+        id: 1,
+        attributes: {
+          type: 'text',
+          optionsHistory: [],
+        },
+      },
+    });
+
+    const component = await store.find('component', 1);
+    const textOptions = component.optionsHistory.createFragment({
+      fontFamily: 'Verdana',
+      fontSize: 12,
+    });
+
+    assert.ok(
+      textOptions instanceof ComponentOptionsText,
+      'options is ComponentOptionsText'
+    );
+    assert.equal(
+      textOptions.fontFamily,
+      'Verdana',
+      'options has correct fontFamily attribute'
+    );
+    assert.equal(
+      textOptions.fontSize,
+      12,
+      'options has correct fontSize attribute'
+    );
+    assert.equal(
+      component.optionsHistory.length,
+      1,
+      'fragment object was added to fragment array'
+    );
+  });
+
+  test('createRecord supports polymorphic typeKey for fragment and fragment arrays', async function (assert) {
+    const zoo = store.createRecord('zoo', {
+      star: {
+        $type: 'lion',
+        name: 'Mittens',
+        hasManes: true,
+      },
+      animals: [
+        {
+          $type: 'lion',
+          name: 'Alex',
+          hasManes: false,
+        },
+        {
+          $type: 'elephant',
+          name: 'Heffalump',
+          trunkLength: 7,
+        },
+      ],
+    });
+
+    const star = zoo.star;
+    assert.ok(star instanceof Lion, 'star is a lion');
+    assert.strictEqual(star.name, 'Mittens', 'star name is correct');
+    assert.strictEqual(star.hasManes, true, 'star has manes');
+    assert.strictEqual(star.zoo, zoo, 'star fragment owner is correct');
+
+    const animals = zoo.animals;
+    assert.strictEqual(animals.length, 2);
+
+    const lion = animals.firstObject;
+    assert.ok(lion instanceof Lion, 'first animal is a lion');
+    assert.strictEqual(lion.name, 'Alex', 'lion name is correct');
+    assert.false(lion.hasManes, 'lion does not have manes');
+    assert.strictEqual(lion.zoo, zoo, 'lion fragment owner is correct');
+
+    const elephant = animals.lastObject;
+    assert.ok(elephant instanceof Elephant, 'second animal is an elephant');
+    assert.strictEqual(elephant.name, 'Heffalump', 'elephant name is correct');
+    assert.strictEqual(elephant.trunkLength, 7, 'trunk length is correct');
+    assert.strictEqual(elephant.zoo, zoo, 'elephant fragment owner is correct');
+  });
 });