Class Model

Get the reference for the specified belongsTo relationship.

Example

```js {data-filename=app/models/blog.js} import Model, { belongsTo } from '@ember-data/model';

export default class BlogModel extends Model {

Returns an object, whose keys are changed properties, and value is an [oldProp, newProp] array.

The array represents the diff of the canonical state with the local state of the model. Note: if the model is created locally, the canonical state is empty since the adapter hasn't acknowledged the attributes yet:

Example

```js {data-filename=app/models/mascot.js} import Model, { attr } from '@ember-data/model';

export default class MascotModel extends Model {

Marks the record as deleted but does not save it. You must call save afterwards if you want to persist it. You might use this method if you want to allow the user to still rollbackAttributes() after a delete was made.

Example

```js {data-filename=app/controllers/model/delete.js} import Controller from '@ember/controller'; import { action } from '@ember/object';

export default class ModelDeleteController extends Controller {

Same as deleteRecord, but saves the record immediately.

Example

```js {data-filename=app/controllers/model/delete.js} import Controller from '@ember/controller'; import { action } from '@ember/object';

export default class ModelDeleteController extends Controller {

Iterates through the attributes of the model, calling the passed function on each attribute.

The callback method you provide should have the following signature (all parameters are optional):

function(name, meta);

• name the name of the current property in the iteration
• meta the meta object for the attribute property in the iteration

Note that in addition to a callback, you can also pass an optional target object that will be set as this on the context.

Example

```javascript import Model, { attr } from '@ember-data/model';

class PersonModel extends Model {

Given a callback, iterates over each of the types related to a model, invoking the callback with the related type's class. Each type will be returned just once, regardless of how many different relationships it has with a model.

Given a callback, iterates over each of the relationships in the model, invoking the callback with the name of each relationship and its relationship descriptor.

Iterates through the transformedAttributes of the model, calling the passed function on each attribute. Note the callback will not be called for any attributes that do not have an transformation type.

The callback method you provide should have the following signature (all parameters are optional):

function(name, type);

• name the name of the current property in the iteration
• type a string containing the name of the type of transformed applied to the attribute

Note that in addition to a callback, you can also pass an optional target object that will be set as this on the context.

Example

import Model, { attr } from '@ember-data/model';

let Person = Model.extend({
   firstName: attr(),
   lastName: attr('string'),
   birthday: attr('date')
 });

Person.eachTransformedAttribute(function(name, type) {
   // do thing
 });

// prints:
// lastName string
// birthday date

Get the reference for the specified hasMany relationship.

Example

```js {data-filename=app/models/blog.js} import Model, { hasMany } from '@ember-data/model';

export default class BlogModel extends Model {

Find the relationship which is the inverse of the one asked for.

For example, if you define models like this:

```js {data-filename=app/models/post.js} import Model, { hasMany } from '@ember-data/model';

export default class PostModel extends Model {

Reload the record from the adapter.

This will only work if the record has already finished loading.

Example

```js {data-filename=app/controllers/model/view.js} import Controller from '@ember/controller'; import { action } from '@ember/object';

export default class ViewController extends Controller {

If the model hasDirtyAttributes this function will discard any unsaved changes. If the model isNew it will be removed from the store.

Example

record.name; // 'Untitled Document'
record.set('name', 'Doc 1');
record.name; // 'Doc 1'
record.rollbackAttributes();
record.name; // 'Untitled Document'

Save the record and persist any changes to the record to an external source via the adapter.

Example

record.set('name', 'Tomster');
record.save().then(function() {
  // Success callback
}, function() {
  // Error callback
});

If you pass an object using the adapterOptions property of the options argument it will be passed to your adapter via the snapshot.

record.save({ adapterOptions: { subscribe: false } });

import MyCustomAdapter from './custom-adapter';

export default class PostAdapter extends MyCustomAdapter {
  updateRecord(store, type, snapshot) {
    if (snapshot.adapterOptions.subscribe) {
      // ...
    }
    // ...
  }
}

Create a JSON representation of the record, using the serialization strategy of the store's adapter.

serialize takes an optional hash as a parameter, currently supported options are:

• includeId: true if the record's ID should be included in the JSON representation.

Returns the name of the model class.

For a given relationship name, returns the model type of the relationship.

For example, if you define a model like this:

```js {data-filename=app/models/post.js} import Model, { hasMany } from '@ember-data/model';

export default class PostModel extends Model {

Unloads the record from the store. This will not send a delete request to your server, it just unloads the record from memory.