- A model with an id of 101, stored in a - Bindable.Collection with a url of "/notes", + A model with an id of 101, stored in a + Bindable.Collection with a url of "/notes", would have this URL: "/notes/101"
- +
clonemodel.clone()
Create a new instance of a model with identical attributes.
isNewmodel.isNew()
Has this model been saved to the server yet? If the model does not yet have
an id, it is considered to be new.
changemodel.change()
@@ -545,14 +550,14 @@ one.set({
aggregate rapid changes to a model, you'll want to fire the "change"
event when you're finished. Call model.change() to trigger it.
hasChangedmodel.hasChanged([attribute])
Has the model changed since the last "change" event? If an attribute
is passed, returns true if that specific attribute has changed.
book.bind("change", function() {
if (book.hasChanged("title")) {
@@ -570,14 +575,14 @@ book.bind("change", function() {
to figure out which portions of a view should be updated, or what calls
need to be made to sync the changes to the server.
-
+
previousmodel.previous(attribute)
- During a "change" event, this method can be used to get the
+ During a "change" event, this method can be used to get the
previous value of a changed attribute.
-
+
var bill = new Backbone.Model({
name: "Bill Smith"
@@ -593,12 +598,74 @@ bill.set({name : "Bill Jones"});
previousAttributesmodel.previousAttributes()
- Return a copy of the model's previous attributes. Useful for getting a
- diff between versions of a model, or for recovering from a failed validation.
+ Return a copy of the model's previous attributes. Useful for getting a
+ diff between versions of a model, or getting back to a valid state after
+ an error occurs.
+ Backbone.Collection
+
+ Collections are ordered sets of models. You can bind callbacks to be notified
+ when any model in the collection is changed, listen for "add" and
+ "remove" events, fetch the collection from the server,
+ and use a full suite of
+ Underscore.js
+ functions.
+
+
+ Underscore Methods (24)
+
+ Backbone proxies to Underscore.js to provide 24 iteration functions
+ on Backbone.Collection. They aren't all documented here, but
+ see the Underscore documentation for the full details…
+
+
+
+Books.each(function(book) {
+ book.publish();
+});
+
+var titles = Books.map(function(book) {
+ return book.get("title");
+});
+
+var publishedBooks = Books.filter(function(book) {
+ return book.get("published") === true;
+});
+
+var alphabetical = Books.sortBy(function(book) {
+ return book.author.get("name").toLowerCase();
+});
+