ManyArray Class
A ManyArray
is a MutableArray
that represents the contents of a has-many
relationship.
The ManyArray
is instantiated lazily the first time the relationship is
requested.
Inverses
Often, the relationships in Ember Data applications will have an inverse. For example, imagine the following models are defined:
import Model, { hasMany } from '@ember-data/model';
export default Model.extend({
comments: hasMany('comment')
});
import Model, { belongsTo } from '@ember-data/model';
export default Model.extend({
post: belongsTo('post')
});
If you created a new instance of Post
and added
a Comment
record to its comments
has-many
relationship, you would expect the comment's post
property to be set to the post that contained
the has-many.
We call the record to which a relationship belongs-to the relationship's owner.
Item Index
Methods
Properties
Methods
createRecord
-
hash
Create a child record within the owner
Parameters:
-
hash
Object
Returns:
record
reload
()
public
Reloads all of the records in the manyArray. If the manyArray holds a relationship that was originally fetched using a links url Ember Data will revisit the original links url to repopulate the relationship.
If the manyArray holds the result of a store.query()
reload will
re-run the original query.
Example
var user = store.peekRecord('user', 1)
user.login().then(function() {
user.get('permissions').then(function(permissions) {
return permissions.reload();
});
});
save
()
PromiseArray
Saves all of the records in the ManyArray
.
Example
store.findRecord('inbox', 1).then(function(inbox) {
inbox.get('messages').then(function(messages) {
messages.forEach(function(message) {
message.set('isRead', true);
});
messages.save()
});
});
Returns:
promise
Properties
isLoaded
Boolean
The loading state of this array
isPolymorphic
Boolean
private
true
if the relationship is polymorphic, false
otherwise.
meta
Object
public
Metadata associated with the request for async hasMany relationships.
Example
Given that the server returns the following JSON payload when fetching a hasMany relationship:
{
"comments": [{
"id": 1,
"comment": "This is the first comment",
}, {
// ...
}],
"meta": {
"page": 1,
"total": 5
}
}
You can then access the metadata via the meta
property:
post.get('comments').then(function(comments) {
var meta = comments.get('meta');
// meta.page => 1
// meta.total => 5
});
promise
Ember.RSVP.Promise
private
Used for async hasMany
arrays
to keep track of when they will resolve.
relationship
ManyRelationship
private
The relationship which manages this array.