ModelSync.Local Class
An extension which provides a sync implementation through locally stored key value pairs, either through the HTML localStorage API or falling back onto an in-memory cache, that can be mixed into a Model or ModelList subclass.
A group of Models/ModelLists is serialized in localStorage by either its class name, or a specified 'root' that is provided.
var User = Y.Base.create('user', Y.Model, [Y.ModelSync.Local], {
root: 'user'
});
var Users = Y.Base.create('users', Y.ModelList, [Y.ModelSync.Local], {
model: User,
});Item Index
Properties
Methods
_destroy
()
protected
Sync method correlating to the "delete" operation. Deletes the data from the in-memory object, and saves into localStorage if available.
_index
()
Object[]
protected
Sync method correlating to the "read" operation, for a Model List
Returns:
Array of objects found for that root key
_save
()
protected
Saves the current in-memory store into a localStorage key/value pair if localStorage is available; otherwise, does nothing.
_show
()
Object
protected
Sync method correlating to the "read" operation, for a Model
Returns:
Object found for that root key and model ID
_show
()
Object
protected
Sync method correlating to the "create" operation
Returns:
The new object created.
_update
()
Object
protected
Sync method correlating to the "update" operation
Returns:
The updated object.
generateID
-
pre
Generate a random GUID for our Models. This can be overriden if you have another method of generating different IDs.
Parameters:
-
preStringOptional GUID prefix
sync
-
action -
[options] -
[callback]
Creates a synchronization layer with the localStorage API, if available. Otherwise, falls back to a in-memory data store.
This method is called internally by load(), save(), and destroy().
Parameters:
-
actionStringSync action to perform. May be one of the following:
- create: Store a newly-created model for the first time.
- read : Load an existing model.
- update: Update an existing model.
- delete: Delete an existing model.
-
[options]Object optionalSync options
-
[callback]Function optionalCalled when the sync operation finishes.
-
errError | NullIf an error occurred, this parameter will contain the error. If the sync operation succeeded, err will be falsey.
-
[response]Any optionalThe response from our sync. This value will be passed to the parse() method, which is expected to parse it and return an attribute hash.
-
Properties
_hasLocalStorage
Boolean
private
Feature testing for localStorage availability.
Will return falsey for browsers with localStorage, but that don't
actually work, such as iOS Safari in private browsing mode.
_NON_ATTRS_CFG
Array
protected
static
Properties that shouldn't be turned into ad-hoc attributes when passed to a Model or ModelList constructor.
Default: ['root']
storage
Storage
Shortcut for access to localStorage.
Default: null