Class DS.Adapter
An adapter is an object that receives requests from a store and
translates them into the appropriate action to take against your
persistence layer. The persistence layer is usually an HTTP API, but
may be anything, such as the browser's local storage. Typically the
adapter is not invoked directly instead its functionality is accessed
through the store
.
Creating an Adapter
Create a new subclass of DS.Adapter
in the app/adapters
folder:
import DS from 'ember-data';
export default DS.Adapter.extend({
// ...your code here
});
Model-specific adapters can be created by putting your adapter
class in an app/adapters/
+ model-name
+ .js
file of the application.
import DS from 'ember-data';
export default DS.Adapter.extend({
// ...Post-specific adapter code goes here
});
DS.Adapter
is an abstract base class that you should override in your
application to customize it for your backend. The minimum set of methods
that you should implement is:
findRecord()
createRecord()
updateRecord()
deleteRecord()
findAll()
query()
To improve the network performance of your application, you can optimize your adapter by overriding these lower-level methods:
findMany()
For an example implementation, see DS.RESTAdapter
, the
included REST adapter.
convertResourceObject (payload) Object
Defined in packages/ember-data/lib/system/store/serializer-response.js:295
- payload
- Object
- returns
- Object
an object formatted the way DS.Store understands
This method converts a JSON-API Resource Object to a format that DS.Store understands.
TODO: This method works as an interim until DS.Store understands JSON-API.
createRecord (store, type, snapshot) Promise
Defined in packages/ember-data/lib/system/adapter.js:287
- store
- DS.Store
- type
- DS.Model
the DS.Model class of the record
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Implement this method in a subclass to handle the creation of new records.
Serializes the record and sends it to the server.
Example
import DS from 'ember-data';
export default DS.Adapter.extend({
createRecord: function(store, type, snapshot) {
var data = this.serialize(snapshot, { includeId: true });
var url = type;
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.ajax({
type: 'POST',
url: url,
dataType: 'json',
data: data
}).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
deleteRecord (store, type, snapshot) Promise
Defined in packages/ember-data/lib/system/adapter.js:370
- store
- DS.Store
- type
- DS.Model
the DS.Model class of the record
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Implement this method in a subclass to handle the deletion of a record.
Sends a delete request for the record to the server.
Example
import DS from 'ember-data';
export default DS.Adapter.extend({
deleteRecord: function(store, type, snapshot) {
var data = this.serialize(snapshot, { includeId: true });
var id = snapshot.id;
var url = [type, id].join('/');
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.ajax({
type: 'DELETE',
url: url,
dataType: 'json',
data: data
}).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
findAll (store, type, sinceToken, snapshotRecordArray) Promise
Defined in packages/ember-data/lib/system/adapter.js:124
- store
- DS.Store
- type
- DS.Model
- sinceToken
- String
- snapshotRecordArray
- DS.SnapshotRecordArray
- returns
- Promise
promise
The findAll()
method is used to retrieve all records for a given type.
Example
import DS from 'ember-data';
export default DS.Adapter.extend({
findAll: function(store, type, sinceToken) {
var url = type;
var query = { since: sinceToken };
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.getJSON(url, query).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
findMany (store, type, ids, snapshots) Promise
Defined in packages/ember-data/lib/system/adapter.js:423
- store
- DS.Store
- type
- DS.Model
the DS.Model class of the records
- ids
- Array
- snapshots
- Array
- returns
- Promise
promise
Find multiple records at once if coalesceFindRequests is true.
findRecord (store, type, id, snapshot) Promise
Defined in packages/ember-data/lib/system/adapter.js:87
- store
- DS.Store
- type
- DS.Model
- id
- String
- snapshot
- DS.Snapshot
- returns
- Promise
promise
The findRecord()
method is invoked when the store is asked for a record that
has not previously been loaded. In response to findRecord()
being called, you
should query your persistence layer for a record with the given ID. Once
found, you can asynchronously call the store's push()
method to push
the record into the store.
Here is an example findRecord
implementation:
import DS from 'ember-data';
export default DS.Adapter.extend({
findRecord: function(store, type, id, snapshot) {
var url = [type.modelName, id].join('/');
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.getJSON(url).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
generateIdForRecord (store, type, inputProperties) (String|Number)
Defined in packages/ember-data/lib/system/adapter.js:230
- store
- DS.Store
- type
- DS.Model
the DS.Model class of the record
- inputProperties
- Object
a hash of properties to set on the newly created record.
- returns
- (String|Number)
id
If the globally unique IDs for your records should be generated on the client,
implement the generateIdForRecord()
method. This method will be invoked
each time you create a new record, and the value returned from it will be
assigned to the record's primaryKey
.
Most traditional REST-like HTTP APIs will not use this method. Instead, the ID
of the record will be set by the server, and your adapter will update the store
with the new ID when it calls didCreateRecord()
. Only implement this method if
you intend to generate record IDs on the client-side.
The generateIdForRecord()
method will be invoked with the requesting store as
the first parameter and the newly created record as the second parameter:
generateIdForRecord: function(store, inputProperties) {
var uuid = App.generateUUIDWithStatisticallyLowOddsOfCollision();
return uuid;
}
groupRecordsForFindMany (store, snapshots) Array
Defined in packages/ember-data/lib/system/adapter.js:434
- store
- DS.Store
- snapshots
- Array
- returns
- Array
an array of arrays of records, each of which is to be loaded separately by
findMany
.
Organize records into groups, each of which is to be passed to separate
calls to findMany
.
For example, if your api has nested URLs that depend on the parent, you will want to group records by their parent.
The default implementation returns the records as a single group.
normalizeResponseHelper (serializer, store, modelClass, payload, id, requestType) Object
Defined in packages/ember-data/lib/system/store/serializer-response.js:71
- serializer
- DS.Serializer
- store
- DS.Store
- modelClass
- subclass of DS.Model
- payload
- Object
- id
- String|Number
- requestType
- String
- returns
- Object
JSON-API Document
This is a helper method that always returns a JSON-API Document.
If the current serializer has isNewSerializerAPI
set to true
this helper calls normalizeResponse
instead of extract
.
All the built-in serializers get isNewSerializerAPI
set to true
automatically
if the feature flag is enabled.
pushPayload (store, payload) DS.Model|Array
Defined in packages/ember-data/lib/system/store/serializer-response.js:222
- store
- DS.Store
- payload
- Object
- returns
- DS.Model|Array
one or multiple records from
data
Push a JSON-API Document to the store.
This will push both primary data located in data
and secondary data located
in included
(if present).
pushPayloadData (store, payload) DS.Model|Array
Defined in packages/ember-data/lib/system/store/serializer-response.js:239
- store
- DS.Store
- payload
- Object
- returns
- DS.Model|Array
one or multiple records from
data
Push the primary data of a JSON-API Document to the store.
This method only pushes the primary data located in data
.
pushPayloadIncluded (store, payload) Array
Defined in packages/ember-data/lib/system/store/serializer-response.js:263
- store
- DS.Store
- payload
- Object
- returns
- Array
an array containing zero or more records from
included
Push the secondary data of a JSON-API Document to the store.
This method only pushes the secondary data located in included
.
queryRecord (store, type, query) Promise
Defined in packages/ember-data/lib/system/adapter.js:190
- store
- DS.Store
- type
- subclass of DS.Model
- query
- Object
- returns
- Promise
promise
The queryRecord()
method is invoked when the store is asked for a single
record through a query object.
In response to queryRecord()
being called, you should always fetch fresh
data. Once found, you can asynchronously call the store's push()
method
to push the record into the store.
Here is an example queryRecord
implementation:
Example
import DS from 'ember-data';
import Ember from 'ember';
export default DS.Adapter.extend(DS.BuildURLMixin, {
queryRecord: function(store, type, query) {
var urlForQueryRecord = this.buildURL(type.modelName, null, null, 'queryRecord', query);
return new Ember.RSVP.Promise(function(resolve, reject) {
Ember.$.getJSON(urlForQueryRecord, query).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
serialize (snapshot, options) Object
Defined in packages/ember-data/lib/system/adapter.js:260
- snapshot
- DS.Snapshot
- options
- Object
- returns
- Object
serialized snapshot
Proxies to the serializer's serialize
method.
Example
import DS from 'ember-data';
export default DS.Adapter.extend({
createRecord: function(store, type, snapshot) {
var data = this.serialize(snapshot, { includeId: true });
var url = type;
// ...
}
});
shouldBackgroundReloadAll (store, snapshotRecordArray) Boolean
Defined in packages/ember-data/lib/system/adapter.js:513
- store
- DS.Store
- snapshotRecordArray
- DS.SnapshotRecordArray
- returns
- Boolean
This method is used by the store to determine if the store should
reload a record array after the store.findAll
method resolves
with a cached record array.
This method is only checked by the store when the store is returning a cached record array.
If this method returns true the store will re-fetch all records from the adapter.
shouldBackgroundReloadRecord (store, snapshot) Boolean
Defined in packages/ember-data/lib/system/adapter.js:492
- store
- DS.Store
- snapshot
- DS.Snapshot
- returns
- Boolean
This method is used by the store to determine if the store should
reload a record after the store.findRecord
method resolves a
cached record.
This method is only checked by the store when the store is returning a cached record.
If this method returns true the store will re-fetch a record from the adapter.
shouldReloadAll (store, snapshotRecordArray) Boolean
Defined in packages/ember-data/lib/system/adapter.js:472
- store
- DS.Store
- snapshotRecordArray
- DS.SnapshotRecordArray
- returns
- Boolean
This method is used by the store to determine if the store should
reload all records from the adapter when records are requested by
store.findAll
.
If this method returns true, the store will re-fetch all records from the adapter. If this method returns false, the store will resolve immediately using the cached record.
shouldReloadRecord (store, snapshot) Boolean
Defined in packages/ember-data/lib/system/adapter.js:454
- store
- DS.Store
- snapshot
- DS.Snapshot
- returns
- Boolean
This method is used by the store to determine if the store should
reload a record from the adapter when a record is requested by
store.findRecord
.
If this method returns true, the store will re-fetch a record from the adapter. If this method returns false, the store will resolve immediately using the cached record.
updateRecord (store, type, snapshot) Promise
Defined in packages/ember-data/lib/system/adapter.js:328
- store
- DS.Store
- type
- DS.Model
the DS.Model class of the record
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Implement this method in a subclass to handle the updating of a record.
Serializes the record update and sends it to the server.
Example
import DS from 'ember-data';
export default DS.Adapter.extend({
updateRecord: function(store, type, snapshot) {
var data = this.serialize(snapshot, { includeId: true });
var id = snapshot.id;
var url = [type, id].join('/');
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.ajax({
type: 'PUT',
url: url,
dataType: 'json',
data: data
}).then(function(data) {
Ember.run(null, resolve, data);
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});
validateDocumentStructure (doc) Array
Defined in packages/ember-data/lib/system/store/serializer-response.js:12
- doc
- Object
JSON API document
- returns
- Array
An array of errors found in the document structure
This is a helper method that validates a JSON API top-level document
The format of a document is described here: http://jsonapi.org/format/#document-top-level