Class DS.ActiveModelAdapter
The ActiveModelAdapter is a subclass of the RESTAdapter designed to integrate
with a JSON API that uses an underscored naming convention instead of camelCasing.
It has been designed to work out of the box with the
active_model_serializers
Ruby gem. This Adapter expects specific settings using ActiveModel::Serializers,
embed :ids, embed_in_root: true
which sideloads the records.
This adapter extends the DS.RESTAdapter by making consistent use of the camelization, decamelization and pluralization methods to normalize the serialized JSON into a format that is compatible with a conventional Rails backend and Ember Data.
JSON Structure
The ActiveModelAdapter expects the JSON returned from your server to follow the REST adapter conventions substituting underscored keys for camelcased ones.
Unlike the DS.RESTAdapter, async relationship keys must be the singular form of the relationship name, followed by "id" for DS.belongsTo relationships, or "ids" for DS.hasMany relationships.
Conventional Names
Attribute names in your JSON payload should be the underscored versions of the attributes in your Ember.js models.
For example, if you have a Person
model:
App.FamousPerson = DS.Model.extend({
firstName: DS.attr('string'),
lastName: DS.attr('string'),
occupation: DS.attr('string')
});
The JSON returned should look like this:
{
"famous_person": {
"id": 1,
"first_name": "Barack",
"last_name": "Obama",
"occupation": "President"
}
}
Let's imagine that Occupation
is just another model:
App.Person = DS.Model.extend({
firstName: DS.attr('string'),
lastName: DS.attr('string'),
occupation: DS.belongsTo('occupation')
});
App.Occupation = DS.Model.extend({
name: DS.attr('string'),
salary: DS.attr('number'),
people: DS.hasMany('person')
});
The JSON needed to avoid extra server calls, should look like this:
{
"people": [{
"id": 1,
"first_name": "Barack",
"last_name": "Obama",
"occupation_id": 1
}],
"occupations": [{
"id": 1,
"name": "President",
"salary": 100000,
"person_ids": [1]
}]
}
ajaxError (jqXHR)
Defined in packages/activemodel-adapter/lib/system/active-model-adapter.js:131
- jqXHR
- Object
- returns
error
The ActiveModelAdapter overrides the handleResponse
method
to format errors passed to a DS.InvalidError for all
422 Unprocessable Entity responses.
A 422 HTTP response from the server generally implies that the request was well formed but the API was unable to process it because the content was not semantically correct or meaningful per the API.
For more information on 422 HTTP Error code see 11.2 WebDAV RFC 4918 https://tools.ietf.org/html/rfc4918#section-11.2
buildURL (modelName, id, snapshot, requestType, query) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:31
- modelName
- String
- id
- (String|Array|Object)
single id or array of ids or query
- snapshot
- (DS.Snapshot|Array)
single snapshot or array of snapshots
- requestType
- String
- query
- Object
object of query parameters to send for query requests.
- returns
- String
url
Builds a URL for a given type and optional ID.
By default, it pluralizes the type's name (for example, 'post' becomes 'posts' and 'person' becomes 'people'). To override the pluralization see pathForType.
If an ID is specified, it adds the ID to the path generated
for the type, separated by a /
.
When called by RESTAdapter.findMany() the id
and snapshot
parameters
will be arrays of ids and snapshots.
convertResourceObject (payload) Object
Inherited from DS.Adapter 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
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:637
- store
- DS.Store
- type
- DS.Model
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Called by the store when a newly created record is
saved via the save
method on a model record instance.
The createRecord
method serializes the record and makes an Ajax (HTTP POST) request
to a URL computed by buildURL
.
See serialize
for information on how to customize the serialized form
of a record.
deleteRecord (store, type, snapshot) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:691
- store
- DS.Store
- type
- DS.Model
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Called by the store when a record is deleted.
The deleteRecord
method makes an Ajax (HTTP DELETE) request to a URL computed by buildURL
.
findAll (store, type, sinceToken, snapshotRecordArray) Promise
Inherited from DS.Adapter 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);
});
});
}
});
findBelongsTo (store, snapshot, url) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:602
- store
- DS.Store
- snapshot
- DS.Snapshot
- url
- String
- returns
- Promise
promise
Called by the store in order to fetch a JSON array for
the unloaded records in a belongs-to relationship that were originally
specified as a URL (inside of links
).
For example, if your original payload looks like this:
{
"person": {
"id": 1,
"name": "Tom Dale",
"links": { "group": "/people/1/group" }
}
}
This method will be called with the parent record and /people/1/group
.
The findBelongsTo
method will make an Ajax (HTTP GET) request to the originally specified URL.
findHasMany (store, snapshot, url) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:566
- store
- DS.Store
- snapshot
- DS.Snapshot
- url
- String
- returns
- Promise
promise
Called by the store in order to fetch a JSON array for
the unloaded records in a has-many relationship that were originally
specified as a URL (inside of links
).
For example, if your original payload looks like this:
{
"post": {
"id": 1,
"title": "Rails is omakase",
"links": { "comments": "/posts/1/comments" }
}
}
This method will be called with the parent record and /posts/1/comments
.
The findHasMany
method will make an Ajax (HTTP GET) request to the originally specified URL.
findMany (store, type, ids, snapshots) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:528
- store
- DS.Store
- type
- DS.Model
- ids
- Array
- snapshots
- Array
- returns
- Promise
promise
Called by the store in order to fetch several records together if coalesceFindRequests
is true
For example, if the original payload looks like:
{
"id": 1,
"title": "Rails is omakase",
"comments": [ 1, 2, 3 ]
}
The IDs will be passed as a URL-encoded Array of IDs, in this form:
ids[]=1&ids[]=2&ids[]=3
Many servers, such as Rails and PHP, will automatically convert this URL-encoded array into an Array for you on the server-side. If you want to encode the IDs, differently, just override this (one-line) method.
The findMany
method makes an Ajax (HTTP GET) request to a URL computed by buildURL
, and returns a
promise for the resulting payload.
findRecord (store, type, id, snapshot) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:378
- store
- DS.Store
- type
- DS.Model
- id
- String
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Called by the store in order to fetch the JSON for a given type and ID.
The findRecord
method makes an Ajax request to a URL computed by
buildURL
, and returns a promise for the resulting payload.
This method performs an HTTP GET
request with the id provided as part of the query string.
generateIdForRecord (store, type, inputProperties) (String|Number)
Inherited from DS.Adapter 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
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:728
- 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
.
This implementation groups together records that have the same base URL but
differing ids. For example /comments/1
and /comments/2
will be grouped together
because we know findMany can coalesce them together as /comments?ids[]=1&ids[]=2
It also supports urls where ids are passed as a query param, such as /comments?id=1
but not those where there is more than 1 query param such as /comments?id=2&name=David
Currently only the query param of id
is supported. If you need to support others, please
override this or the _stripIDFromURL
method.
It does not group records that have differing base urls, such as for example: /posts/1/comments/2
and /posts/2/comments/3
handleResponse (status, headers, payload) Object | DS.AdapterError
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:816
- status
- Number
- headers
- Object
- payload
- Object
- returns
- Object | DS.AdapterError
response
Takes an ajax response, and returns the json payload or an error.
By default this hook just returns the json payload passed to it. You might want to override it in two cases:
Your API might return useful results in the response headers. Response headers are passed in as the second argument.
Your API might return errors as successful responses with status code 200 and an Errors text or object. You can return a
DS.InvalidError
or aDS.AdapterError
(or a sub class) from this hook and it will automatically reject the promise and put your record into the invalid or error state.
Returning a DS.InvalidError
from this method will cause the
record to transition into the invalid
state and make the
errors
object available on the record. When returning an
DS.InvalidError
the store will attempt to normalize the error data
returned from the server using the serializer's extractErrors
method.
isInvalid (status, headers, payload) Boolean
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:869
- status
- Number
- headers
- Object
- payload
- Object
- returns
- Boolean
Default handleResponse
implementation uses this hook to decide if the
response is a an invalid error.
isSuccess (status, headers, payload) Boolean
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:855
- status
- Number
- headers
- Object
- payload
- Object
- returns
- Boolean
Default handleResponse
implementation uses this hook to decide if the
response is a success.
normalizeResponseHelper (serializer, store, modelClass, payload, id, requestType) Object
Inherited from DS.Adapter 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.
pathForType (modelName)
Defined in packages/activemodel-adapter/lib/system/active-model-adapter.js:112
- modelName
- String
- returns
String
The ActiveModelAdapter overrides the pathForType
method to build
underscored URLs by decamelizing and pluralizing the object type name.
this.pathForType("famousPerson");
//=> "famous_people"
pushPayload (store, payload) DS.Model|Array
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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
Inherited from DS.Adapter 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.
sortQueryParams (obj) Object
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:199
- obj
- Object
- returns
- Object
By default, the RESTAdapter will send the query params sorted alphabetically to the server.
For example:
store.query('posts', { sort: 'price', category: 'pets' });
will generate a requests like this /posts?category=pets&sort=price
, even if the
parameters were specified in a different order.
That way the generated URL will be deterministic and that simplifies caching mechanisms in the backend.
Setting sortQueryParams
to a falsey value will respect the original order.
In case you want to sort the query parameters with a different criteria, set
sortQueryParams
to your custom sort function.
import DS from 'ember-data';
export default DS.RESTAdapter.extend({
sortQueryParams: function(params) {
var sortedKeys = Object.keys(params).sort().reverse();
var len = sortedKeys.length, newParams = {};
for (var i = 0; i < len; i++) {
newParams[sortedKeys[i]] = params[sortedKeys[i]];
}
return newParams;
}
});
updateRecord (store, type, snapshot) Promise
Inherited from DS.RESTAdapter packages/ember-data/lib/adapters/rest-adapter.js:663
- store
- DS.Store
- type
- DS.Model
- snapshot
- DS.Snapshot
- returns
- Promise
promise
Called by the store when an existing record is saved
via the save
method on a model record instance.
The updateRecord
method serializes the record and makes an Ajax (HTTP PUT) request
to a URL computed by buildURL
.
See serialize
for information on how to customize the serialized form
of a record.
urlForCreateRecord (modelName, snapshot) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:218
- modelName
- String
- snapshot
- DS.Snapshot
- returns
- String
url
urlForDeleteRecord (id, modelName, snapshot) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:239
- id
- String
- modelName
- String
- snapshot
- DS.Snapshot
- returns
- String
url
urlForFind (id, modelName, snapshot) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:124
- id
- String
- modelName
- String
- snapshot
- DS.Snapshot
- returns
- String
url
urlForFindAll (modelName) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:142
- modelName
- String
- returns
- String
url
urlForFindBelongTo (id, modelName) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:208
- id
- String
- modelName
- String
- returns
- String
url
urlForFindHasMany (id, modelName) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:198
- id
- String
- modelName
- String
- returns
- String
url
urlForFindMany (ids, modelName, snapshots) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:187
- ids
- Array
- modelName
- String
- snapshots
- Array
- returns
- String
url
urlForQuery (query, modelName) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:160
- query
- Object
- modelName
- String
- returns
- String
url
urlForQueryRecord (query, modelName) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:177
- query
- Object
- modelName
- String
- returns
- String
url
urlForUpdateRecord (id, modelName, snapshot) String
Inherited from DS.BuildURLMixin packages/ember-data/lib/adapters/build-url-mixin.js:228
- id
- String
- modelName
- String
- snapshot
- DS.Snapshot
- returns
- String
url
validateDocumentStructure (doc) Array
Inherited from DS.Adapter 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