DS.Store Class packages/ember-data/lib/system/store.js:44


Extends: Ember.Object

Defined in: packages/ember-data/lib/system/store.js:44

Module: ember-data

The store contains all of the data for records loaded from the server. It is also responsible for creating instances of DS.Model that wrap the individual data for a record, so that they can be bound to in your Handlebars templates.

Define your application's store like this:

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MyApp.Store = DS.Store.extend();

Most Ember.js applications will only have a single DS.Store that is automatically created by their Ember.Application.

You can retrieve models from the store in several ways. To retrieve a record for a specific id, use DS.Model's find() method:

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var person = App.Person.find(123);

If your application has multiple DS.Store instances (an unusual case), you can specify which store should be used:

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var person = store.find(App.Person, 123);

In general, you should retrieve models using the methods on DS.Model; you should rarely need to interact with the store directly.

By default, the store will talk to your backend using a standard REST mechanism. You can customize how the store talks to your backend by specifying a custom adapter:

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 MyApp.store = DS.Store.create({
   adapter: 'MyApp.CustomAdapter'
 });

You can learn more about writing a custom adapter by reading the DS.Adapter documentation.

Show:

_load

(type, data, partial) private

This internal method is used by push.

Parameters:

type DS.Model
data Object
partial Boolean
the data should be merged into the existing data, not replace it.

adapterFor

(type) private

Returns the adapter for a given type.

Parameters:

type subclass of DS.Model

Returns:

DS.Adapter

all

(type) DS.RecordArray

This method returns a filtered array that contains all of the known records for a given type.

Note that because it's just a filter, it will have any locally created records of the type.

Also note that multiple calls to all for a given type will always return the same RecordArray.

Parameters:

type Class

Returns:

DS.RecordArray

buildRecord

(type, id, data) private

Build a brand new record for a given type, ID, and initial data.

Parameters:

type subclass of DS.Model
id String
data Object

Returns:

DS.Model

createRecord

(type, properties)

Create a new record in the current store. The properties passed to this method are set on the newly created record.

To create a new instance of App.Post:

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store.createRecord('post', {
  title: "Rails is omakase"
});

Parameters:

type String
properties Object
a hash of properties to set on the newly created record.

Returns:

DS.Model

dataWasUpdated

(type, clientId, record) private

If the adapter updates attributes or acknowledges creation or deletion, the record will notify the store to update its membership in any filters. To avoid thrashing, this method is invoked only once per

run loop per record.

Parameters:

type Class
clientId Number|String
record DS.Model

deleteRecord

(record)

For symmetry, a record can be deleted via the store.

Parameters:

record DS.Model

dematerializeRecord

(record) private

When a record is destroyed, this un-indexes it and removes it from any record arrays so it can be GCed.

Parameters:

record DS.Model

didSaveRecord

(record, data) private

This method is called once the promise returned by an adapter's createRecord, updateRecord or deleteRecord is resolved.

If the data provides a server-generated ID, it will update the record and the store's indexes.

Parameters:

record DS.Model
the in-flight record
data Object
optional data (see above)

didUpdateAll

(type)

Parameters:

type

fetchAll

(type, array) private

Parameters:

type
array

Returns:

Promise

fetchMany

(records, owner) private

This method takes a list of records, groups the records by type, converts the records into IDs, and then invokes the adapter's findMany method.

The records are grouped by type to invoke findMany on adapters for each unique type in records.

It is used both by a brand new relationship (via the findMany method) or when the data underlying an existing relationship changes.

Parameters:

records
owner

fetchRecord

(record) private

This method is called by findById if it discovers that a particular type/id pair hasn't been loaded yet to kick off a request to the adapter.

Parameters:

record DS.Model

Returns:

Promise

filter

(type, query, filter) DS.FilteredRecordArray

Takes a type and filter function, and returns a live RecordArray that remains up to date as new records are loaded into the store or created locally.

The callback function takes a materialized record, and returns true if the record should be included in the filter and false if it should not.

The filter function is called once on all records for the type when it is created, and then once on each newly loaded or created record.

If any of a record's properties change, or if it changes state, the filter function will be invoked again to determine whether it should still be in the array.

Optionally you can pass a query which will be triggered at first. The results returned by the server could then appear in the filter if they match the filter function.

Parameters:

type Class
query Object
optional query
filter Function

find

(type, id)

This is the main entry point into finding records. The first parameter to this method is the model's name as a string.


To find a record by ID, pass the id as the second parameter:

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store.find('person', 1);

The find method will always return a promise that will be resolved with the record. If the record was already in the store, the promise will be resolved immediately. Otherwise, the store will ask the adapter's find method to find the necessary data.

The find method will always resolve its promise with the same object for a given type and id.


To find all records for a type, call find with no additional parameters:

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store.find('person');

This will ask the adapter's findAll method to find the records for the given type, and return a promise that will be resolved once the server returns the values.


To find a record by a query, call find with a hash as the second parameter:

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store.find(App.Person, { page: 1 });

This will ask the adapter's findQuery method to find the records for the query, and return a promise that will be resolved once the server responds.

Parameters:

type DS.Model
id Object|String|Integer|null

findAll

(type) DS.AdapterPopulatedRecordArray private

This method returns an array of all records adapter can find. It triggers the adapter's findAll method to give it an opportunity to populate the array with records of that type.

Parameters:

type Class

findById

(type, id) private

This method returns a record for a given type and id combination.

Parameters:

type
id

findByIds

(type, ids) private

This method makes a series of requests to the adapter's find method and returns a promise that resolves once they are all loaded.

Parameters:

type String
ids Array

Returns:

Promise

findHasMany

(owner, link, type, resolver) private

If a relationship was originally populated by the adapter as a link (as opposed to a list of IDs), this method is called when the relationship is fetched.

The link (which is usually a URL) is passed through unchanged, so the adapter can make whatever request it wants.

The usual use-case is for the server to register a URL as a link, and then use that URL in the future to make a request for the relationship.

Parameters:

owner DS.Model
link Any
type String
resolver Resolver

Returns:

DS.ManyArray

findMany

(owner, records, type, resolver) private

Parameters:

owner DS.Model
records Array
type String
resolver Resolver

Returns:

DS.ManyArray

findQuery

(type, query) private

This method delegates a query to the adapter. This is the one place where adapter-level semantics are exposed to the application.

Exposing queries this way seems preferable to creating an abstract query language for all server-side queries, and then require all adapters to implement them.

This method returns a promise, which is resolved with a RecordArray once the server returns.

Parameters:

type String
query Any
an opaque query to be used by the adapter

Returns:

Promise

flushPendingSave

private

This method is called at the end of the run loop, and flushes any records passed into scheduleSave

generateId

(type)

If possible, this method asks the adapter to generate an ID for a newly created record.

Parameters:

type String

Returns:

String if the adapter can generate one, an ID

getById

(type, id)

Get a record by a given type and ID without triggering a fetch.

This method will synchronously return the record if it's available. Otherwise, it will return null.

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var post = store.getById('post', 1);

Parameters:

type
id

hasRecordForId

(type, id)

Returns true if a record for a given type and ID is already loaded.

Parameters:

type DS.Model
id String|Integer

Returns:

Boolean

init

private

metaForType

(type, metadata)

If you have some metadata to set for a type you can call metaForType.

Parameters:

type String
metadata Object

metadataFor

(type) Object

This method returns the metadata for a specific type.

Parameters:

type String

Returns:

Object

modelFor

(key) subclass of DS.Model

Returns a model class for a particular key. Used by methods that take a type key (like find, createRecord, etc.)

Parameters:

key String or subclass of DS.Model

Returns:

subclass of DS.Model

push

(type, data)

Push some data for a given type into the store.

This method expects normalized data:

  • The ID is a key named id (an ID is mandatory)
  • The names of attributes are the ones you used in your model's DS.attrs.
  • Your relationships must be:
    • represented as IDs or Arrays of IDs
    • represented as model instances
    • represented as URLs, under the links key

For this model:

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App.Person = DS.Model.extend({
  firstName: DS.attr(),
  lastName: DS.attr(),

  children: DS.hasMany('person')
});

To represent the children as IDs:

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{
  id: 1,
  firstName: "Tom",
  lastName: "Dale",
  children: [1, 2, 3]
}

To represent the children relationship as a URL:

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{
  id: 1,
  firstName: "Tom",
  lastName: "Dale",
  links: {
    children: "/people/1/children"
  }
}

If you're streaming data or implementing an adapter, make sure that you have converted the incoming data into this form.

This method can be used both to push in brand new records, as well as to update existing records.

Parameters:

type String
data Object

Returns:

DS.Model the record that was created or updated.

pushMany

(type, datas) Array

If you have an Array of normalized data to push, you can call pushMany with the Array, and it will call push repeatedly for you.

Parameters:

type String
datas Array

Returns:

Array

pushPayload

(type, payload)

Push some raw data into the store.

The data will be automatically deserialized using the serializer for the type param.

This method can be used both to push in brand new records, as well as to update existing records.

You can push in more than one type of object at once. All objects should be in the format expected by the serializer.

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App.ApplicationSerializer = DS.ActiveModelSerializer;

var pushData = {
  posts: [
    {id: 1, post_title: "Great post", comment_ids: [2]}
  ],
  comments: [
    {id: 2, comment_body: "Insightful comment"}
  ]
}

store.pushPayload('post', pushData);

Parameters:

type String
payload Object

recordForId

(type, id)

Returns id record for a given type and ID. If one isn't already loaded, it builds a new record and leaves it in the empty state.

Parameters:

type String
id String|Integer

Returns:

DS.Model

recordIsLoaded

(type, id) Boolean

This method returns if a certain record is already loaded in the store. Use this function to know beforehand if a find() will result in a request or that it will be a cache hit.

Parameters:

type
id String

Returns:

Boolean

recordWasError

(record) private

This method is called once the promise returned by an adapter's createRecord, updateRecord or deleteRecord is rejected (with anything other than a DS.InvalidError).

Parameters:

record DS.Model

recordWasInvalid

(record, errors) private

This method is called once the promise returned by an adapter's createRecord, updateRecord or deleteRecord is rejected with a DS.InvalidError.

Parameters:

record DS.Model
errors Object

reloadRecord

(record, resolver) private

This method is called by the record's reload method. The record's reload passes in a resolver for the promise it returns.

This method calls the adapter's find method, which returns a promise. When that promise resolves, reloadRecord will resolve the promise returned by the record's reload.

Parameters:

record DS.Model
resolver Resolver

scheduleSave

(record, resolver) private

This method is called by record.save, and gets passed a resolver for the promise that record.save returns.

It schedules saving to happen at the end of the run loop.

Parameters:

record DS.Model
resolver Resolver

serialize

(record, options) private

Returns a JSON representation of the record using a custom type-specific serializer, if one exists.

The available options are:

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

Parameters:

record DS.Model
the record to serialize
options Object
an options hash

serializerFor

(type) private

Returns an instance of the serializer for a given type. For example, serializerFor('person') will return an instance of App.PersonSerializer.

If no App.PersonSerializer is found, this method will look for an App.ApplicationSerializer (the default serializer for your entire application).

If no App.ApplicationSerializer is found, it will fall back to an instance of DS.JSONSerializer.

Parameters:

type String
the record to serialize

typeMapFor

(type) private

Returns a map of IDs to client IDs for a given type.

Parameters:

type

unloadAll

(type)

This method unloads all of the known records for a given type.

Parameters:

type Class

unloadRecord

(record)

For symmetry, a record can be unloaded via the store.

Parameters:

record DS.Model

updateId

(record, data) private

When an adapter's createRecord, updateRecord or deleteRecord resolves with data, this method extracts the ID from the supplied data.

Parameters:

record DS.Model
data Object
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adapter

{DS.Adapter|String}

The adapter to use to communicate to a backend server or other persistence layer.

This can be specified as an instance, class, or string.

If you want to specify App.CustomAdapter as a string, do:

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adapter: 'custom'

Default: DS.RESTAdapter

defaultAdapter

private

This property returns the adapter, after resolving a possible string key.

If the supplied adapter was a class, or a String property path resolved to a class, this property will instantiate the class.

This property is cacheable, so the same instance of a specified adapter class should be used for the lifetime of the store.

Returns:

DS.Adapter