I have overridden the Backbone.Model and extended my own Model with a validate method but it doesn't seem to trigger when updating my model with a set including the validate: true flag.
Mod.Field.Model = App.Base.Objects.BaseModel.extend({
url: "../WebServices/Myclass.asmx/GetData",
defaults: {
DisplayName: ""
},
validate: function (attrs) {
if (attrs.DisplayName == "") {
return "DisplayName cannot be an empty string.";
}
}
});
In my CollectionView:
item_view.model.set({ "DisplayName": event.target.value }, { silent: false, validate: true });
Nothing seems to trigger the validate method on the model when calling the set. I have tried called this as well:
item_view.model.isValid();
But that doesn't trigger it either.
Using Backbone version 1.1
This code below works....but still the question is why the code above will not work with the overridden model?
Mod.Test = {};
Mod.Test.Model = Backbone.Model.extend({
url: "",
defaults: {
DisplayName: ""
},
validate: function (attr) {
if (attrs.DisplayName == "") {
return "DisplayName cannot be an empty string.";
}
}
});
Mod.Test.ItemView = Marionette.ItemView.extend({
tagName: "div"
});
var newView = new Mod.Test.ItemView({
model: new Mod.Test.Model()
});
newView.model.set({ "DisplayName": 123 }, { validate: true });
newView.model.get("DisplayName");
Just tested another scenario. I replaced the Mod.Test.Model with my overridden one with the sample code and it works. The culprit seems to be the way I was getting the view back from the CompositeView for the model.
updateItem: function (event) {
var event_target = $(event.target);
var zero_length = event.target.value.length == 0 ? true : false;
var item_view = this.children.findByCid(event_target.attr("data-viewcid"));
The issue ended up being my Collection that I had overridden that was setting the default model to one that I was not actually using.
This fixed the issue:
this.collection = new App.Base.BaseCollection(this.model.get("mydata"), { model: Mod.Field.Model });
Related
I have the problem that the event "form:selectedForm" is calling the method "showForm" but when sending this to my view I am getting the following error: TypeError: e[t] is not a function.
This is stated in line 128 in the backbone.js script but I have no clue what he is doing there. It looks like that he is looking for a "to" or "on" event on the collection.
What I am doing wrong here?
MyController = Backbone.Marionette.Controller.extend({
initialize: function(options) {
this.options = options;
this.urls = options.urls;
this.mainRegion = options.mainRegion;
this.view = new MyLayout();
this.mainRegion.show(this.view);
this.view.render();
this.showSelectorView(this.view.formHeader);
},
showSelectorView : function(view) {
var forms = new MyForms();
forms = this.urls.loadForms;
var selectorView = new FormSelectorView({
collection: forms
});
forms.fetch();
this.listenTo(selectorView, "form:selectedForm", this.showForm);
view.show(selectorView);
},
showForm : function(models) {
console.log("showForm");
var form = new FormContentView({
collection: models
});
this.view.form.show(form);
}
});
MyLayout = Backbone.Marionette.Layout.extend({
template: Backbone.Marionette.TemplateCache.get('#content'),
regions: {
formHeader: "#selector",
form: "#formContent",
formContent: "#content",
formFooter: "#save",
formTemplates: "#templates"
}
});
FormSelectorView = Backbone.Marionette.ItemView.extend({
template: Backbone.Marionette.TemplateCache.get('form-selector-template'),
events : {
"click option" : "selectForm"
},
initialize : function() {
this.listenTo(this.collection, "sync", this.render, this);
},
selectForm : function(e) {
e.preventDefault();
var id = $(e.currentTarget).attr("name");
var item = this.collection.get(id);
this.trigger("form:selectedForm", item.attributes.fields);
}
});
I think the error is in your showSelector view function, you are overwriting your forms collection in the second line,
i think your intention in that line was to assing the url of the forms collection so my guess is that this will fix it:
showSelectorView : function(view) {
var forms = new MyForms();
forms.url = this.urls.loadForms; /// Im assuming you were trying to pass the url here
var selectorView = new FormSelectorView({
collection: forms
});
forms.fetch();
this.listenTo(selectorView, "form:selectedForm", this.showForm);
view.show(selectorView);
},
I am trying to populate instagram images using backbone,
I have basically 3 models as follows,
User model store all the user info related to instagram
App.Models.User = Backbone.Model.extend({
defaults: {
id: '',
access_token: '',
userid: '',
username: '',
full_name: '',
profile_picture: ''
},
urlRoot: "/api/user/",
initurl: function() {
return "https://api.instagram.com/v1/users/"+this.get('userid')+"/media/recent/?access_token=" + this.get('access_token');
},
initialize: function() {
this.set('id', $('#domdump .id').val());
this.fetch({
success: function(model) {
var photos = new App.Collections.Ig_photos([],{
url: model.initurl()
});
}
});
}
});
A model to store the next url for pagination
App.Models.Ig_next_url = Backbone.Model.extend({
defaults: {
next_url: ''
},
next_url:function(){
return this.get('next_url');
}
});
A model for the photo
App.Models.Ig_photo = Backbone.Model.extend({});
A collection for the multiple photo
App.Collections.Ig_photos = Backbone.Collection.extend({
model: App.Models.Ig_photo,
initialize: function(model, options) {
this.url = options.url;
this.nextSet();
},
sync: sync_jsonp,
parse: function( response ) {
if(response.pagination && response.pagination.next_url && response.pagination.next_url != this.url){
var next_url = new App.Models.Ig_next_url({ next_url: response.pagination.next_url });
this.url = next_url.next_url();
}
return response.data;
},
nextSet: function(){
this.fetch({
success: function(photos){
var ig_photos_views = new App.Views.Ig_photos_view({ collection: photos});
console.log(photos);
}
});
}
});
Also i have some views that does the render with a load more button that calls the nextset of the collection.
What i was trying to achieve is the photos get appended to the collection upon nextset() and the collection get updated with pervious data + new data but right now its getting overwritten.
Also is it okay to instantiate new collection from the modelfetch ?
You shouldn't need to make a new view. You should instead listen to the "add" event being triggered on the collection and render new items accordingly.
nextSet: function(){
this.fetch({add : true}); // The add option appends to the collection
}
This option is detailed in the very good documentation.
I took the base of this code from a gist. It initially worked perfectly when I first fetch()ed the collection and then in render() called tw-bootstap's .typeahead().
However, I have put in a keypress event to try and restrict the size of the data returned by fetch(). The collection data is returned and it is filtered through prepData() fine and arrives at render(). The typeahead is not working, however at that stage. It may be that the backbone event is overriding render at that point?
// typeahead on the numbers
var Bootstrap = {};
Bootstrap.Typeahead = Backbone.View.extend({
el: '#autocompleteN',
tagName: 'input',
attributes: {"data-provide": "typeahead"},
initialize: function(options){
if(!this.collection) {
return null;
}
//this.collection.on("reset", this.prepData, this);
},
events: {
"keypress": "setSearch"
},
setSearch: _.throttle(function(e) {
var that=this;
var d = e.currentTarget.value;
// strip spaces and remove non-numerics
d = d.replace(/ /g,'');
d = d.replace(/[^0-9]/g, '');
// if it's longer than 2, call a fetch;
if(d.length > 2) {
$.when( app.searchNums.fetch({url: 'api/index.php/search/num/'+d}) ).then(function() {
//console.dir("success");
that.prepData();
});
}
}, 1000),
prepData: function() {
//console.dir("prepData called");
var prepare = _.pluck(this.collection.models, 'attributes');
this.property = this.options.property || _.keys(prepare[0])[0];
this.items = this.options.items;
this.data = _.pluck(prepare, this.property);
this.render();
},
render: function() {
var that = this;
that.$el.typeahead({
source: that.data,
//source: ['PHP', 'MySQL', 'SQL', 'PostgreSQL', 'HTML', 'CSS', 'HTML5', 'CSS3', 'JSON'],
items: that.items,
onselect: function( data ) {
// render the results view here
}
});
return this;
}
});
var bui = new Bootstrap.Typeahead({
collection: app.searchNums,
items: 5
});
Why dont you just set minLength on the typeahead, it looks like that is what you are trying to do?
I've been working on a prototype Backbone application using Backbone.LayoutManager and I'm running into something I don't understand.
The scenario is that I have a form for adding "people" {firstname, lastname} to a list view, I save the model fine and the new item shows up in the list. I also have a remove function that works when after the page is refreshed, but if I try to delete the person I just created without a page refresh, the removeUser() function never gets called.
My code is below. Can someone help me out? I'm just trying to learn Backbone and if you have the answer to this question as well as any other criticisms, I'd be grateful. Thanks.
define([
// Global application context.
"app",
// Third-party libraries.
"backbone"
],
function (app, Backbone) {
var User = app.module();
User.Model = Backbone.Model.extend({
defaults : {
firstName: "",
lastName: ""
}
});
User.Collection = Backbone.Collection.extend({
model: User.Model,
cache: true,
url: "/rest/user"
});
User.Views.EmptyList = Backbone.View.extend({
template: "users/empty-list",
className: "table-data-no-content",
render: function (manage) {
return manage(this).render().then(function () {
this
.$el
.insertAfter(".table-data-header")
.hide()
.slideDown();
});
}
});
User.Views.Item = Backbone.View.extend({
template: "users/user",
tagName: "ul",
className: "table-data-row"
events: {
"click .remove": "removeUser"
},
removeUser: function () {
console.log(this.model);
this.model.destroy();
this.collection.remove(this.model);
this.$el.slideUp();
if (this.collection.length === 0) {
this.insertView(new User.Views.EmptyList).render();
}
}
});
User.Views.List = Backbone.View.extend({
initialize: function () {
this.collection.on("change", this.render, this);
},
render: function (manage) {
if (this.collection.length > 0) {
jQuery(".table-data-no-content").slideUp("fast", function() {
$(this).remove();
});
this.collection.each(function(model) {
this.insertView(new User.Views.Item({
model: model,
collection: this.collection,
serialize: model.toJSON()
}));
}, this);
} else {
this.insertView(new User.Views.EmptyList());
}
// You still must return this view to render, works identical to
// existing functionality.
return manage(this).render();
}
});
User.Views.AddUser = Backbone.View.extend({
template: "users/add-user",
events: {
"click input#saveUser": "saveUser"
},
render: function (manage) {
return manage(this).render().then(function () {
$("input[type='text']")
.clearField()
.eq(0)
.focus();
});
},
saveUser: function () {
var user = new User.Model({
firstName: $(".first-name").val(),
lastName: $(".last-name").val()
});
this.collection.create(user);
this
.$("input[type='text']")
.val("")
.clearField("refresh")
.removeAttr("style")
.eq(0)
.focus();
}
});
return User;
});
The problem turned out to be an incorrect response from the server. Once the server sent back the correct JSON object, everything worked correctly.
I'm experimenting for the first time with backbone.js and I have a very simple Grails application with a single domain called Book. Things seem to be working well however, I've noticed that when I POST the data from the form to the server backbone then does a GET to the server with the ID of the new record. However, the POST returns the results as JSON and populates the table accordingly. I'm not sure I understand the need for the GET following the POST or how to stop this from happening.
$(function() {
// Model
window.Book = Backbone.Model.extend({
url: function() {
return this.id ? '/BackboneTest/books/' + this.id : '/BackboneTest/books.json';
},
defaults: { book: {
title: 'None entered',
description: 'None entered',
isbn: 'None entered'
}},
initialize: function() {
// can be used to initialize model attributes
}
});
// Collection
window.BookCollection = Backbone.Collection.extend({
model: Book,
url: '/BackboneTest/books.json'
});
window.Books = new BookCollection;
//View
window.BookView = Backbone.View.extend({
tagName: 'tr',
events: {
// can be used for handling events on the template
},
initialize: function() {
//this.render();
},
render: function() {
var book = this.model.toJSON();
//Template stuff
$(this.el).html(ich.book_template(book));
return this;
}
});
// Application View
window.AppView = Backbone.View.extend({
el: $('#book_app'),
events: {
"submit form":"createBook"
},
initialize: function() {
_.bindAll(this, 'addOne', 'addAll');
Books.bind('add', this.addOne);
Books.bind('refresh', this.addAll);
Books.bind('all', this.render);
Books.fetch();
},
addOne: function(book) {
var view = new BookView({model:book});
this.$('#book_table').append(view.render().el);
},
addAll: function() {
Books.each(this.addOne);
},
newAttributes: function(event) {
return { book: {
title: $('#title').val(),
description: $('#description').val(),
isbn: $('#isbn').val()
} }
},
createBook: function(e) {
e.preventDefault();
var params = this.newAttributes(e);
Books.create(params)
//TODO clear form fields
}
});
// Start the backbone app
window.App = new AppView;
});
I've determined that the cause of this was server side. Because of some scaffolded code that got generated for testing purposes, on the save, there was an additional redirect which resulted in a 302. This caused the GET after the POST. Once I cleaned up the server side code, I only get the POST, as expected.
Backbone usesPOST as a factory (getting the id from the server) with:
a payload request { title: 'None entered' }
a response { id: 12, title: 'None entered' }
It seems that your code trigger a GET action after the POST success. The code Books.bind('all', this.render) do not seems to be related to anything. It is not binded like add and there is no such method in the View.