I have checkboxes created in a loop. I set checked to a property name, and want to reach a dynamic value from the checkbox on click. In the property (for key, value) I'm getting the wrong thing - the label of my property instead of the value. Is there a simple way in Ember to get the value out of the checkbox?
Any help is much appreciated.
In HTML:
{{#each url in controllers.application.env.urls}}
<div>
{{view Ember.Checkbox checked=updateServerList valueBinding="url"}}{{url}}
</div>
{{/each}}
In javascript:
updateServerList:function(key,value)
{
if(value!=undefined)
{
console.log("----1 ", key, value);
}
}.property(''),
Per your comment, I started actually playing around with this and realized that it was not as simple as I thought. What I ended up doing was just building a custom component rather than working with Ember.Checkbox.
In your template:
{{#each}}
{{check-box url=url}}
{{/each}}
Component Template:
<script type='text/x-handlebars' id="components/check-box">
{{input type="checkbox" checked=toggleURL}}{{url}}
</script>
The component code:
App.CheckBoxComponent = Ember.Component.extend({
toggleURL: false,
logURL: function() {
console.log(this.url);
// Do something with the URL
}.observes('toggleURL')
});
Related
Template:
{{#each document in documents}}
<div class="col-md-6" {{action "selectDocument" document}}>{{view Ember.Checkbox checked=document.isSelected}} {{document.name}}</div>
{{/each}}
Controller:
App.IndexDocumentsController = Ember.ArrayController.extend({
actions: {
selectDocument: function(document){
document.set('isSelected', !document.get('isSelected'));
}
}
});
When I click on the div, the checkbox toggles 'checked' property. But when I click on the ckeckbox - nothing happens. What can be the reason?
UPDATED
Link to jsbin: http://emberjs.jsbin.com/nuvocumuteto/1/edit?html,css,js,output
The issue is that when you click on the checkbox 2 things happen.
the checkbox toggles the isActive property, then
the selectRow action is ran which again toggles the isActive property
So the isActive property ends up staying in the same state that it was.
In your case I would get rid of the action, wrap the checkbox in a <label> and set the label to display: block.
The template would look like
<script type="text/x-handlebars" data-template-name="index">
<ul>
{{#each item in model}}
<li {{bind-attr class="item.isActive:active"}}><label>{{input type="checkbox" checked=item.isActive}}{{item.name}}</label></li>
{{/each}}
</ul>
</script>
and the css would look like
label {
display: block;
}
you would then be able to get rid of the selectRow action completely because clicking on the label will trigger the checkbox.
You can see a working bin here: http://emberjs.jsbin.com/nuvocumuteto/3/edit
I would argue that you are not following "The Ember Way" in two different ways here.
First, Ember.Checkbox is an internal Ember class (http://emberjs.com/api/classes/Ember.Checkbox.html). The recommended way to render a checkbox is to use the Handlebars input helpers (http://emberjs.com/guides/templates/input-helpers/#toc_checkboxes). This is just wrapping Ember.Checkbox anyway.
Second, if you want to update the value of isSelected, the "Ember Way" is to use two-way data bindings. Your code uses one-way data-binding when it reads document.isSelected and then tries to manually re-create the the data-binding in the other direction when the user clicks by manually writing a selectDocument action and calling it from an {{action}}.
Instead, simply bind the Ember Handlebars Input Helper directly to your value like this:
{{#each document in documents}}
<div class="col-md-6">{{input type="checkbox" checked=document.isSelected}} {{document.name}}</div>
{{/each}}
So far, it looks like Ember does not work as I expected, and I'm hoping I've just missed something. What I need to do is iterate over my model, a blob of JSON made up of arrays and objects, and build out a form. When the user marks a checkbox, the controllers Action updates the model.
Here's how I want it to work...
<form {{action 'answerSupplied'}}>
{{#each model.questions}}
<h3>{{text}}</h3>
{{#each answers}}
{{input type='../type' answerId='id' data-bind-questionNum='../id' text}}
{{/each}}
{{/each}}
</form>
Here's how I can get close to that...
<form {{action 'answerSupplied' this}}>
{{#each model.questions}}
<h3>{{text}}</h3>
{{#each answers}}
{{formbuilder ../type id ../id text}}
{{/each}}
{{/each}}
</form>
==================
Handlebars.registerHelper('formbuilder', function(type, id, qnum, text, options)
{
// console.log(options);
var q_type = options.contexts[0][type],
a_id = options.contexts[1].id,
q_number = options.contexts[0][qnum],
a_text = options.contexts[1].text;
return new Handlebars.SafeString(
'<input type='+ q_type +' id='+ a_id +' name='+
q_number +'>'+ a_text + '</input><br/>'
);
}
});
The big problem wit this is, I can not identify which element was clicked because I don't have access to the event object.
Can I manually bind the action with something like 'data-ember-action', and pass in params? Or, is this too far outside the Ember way?
== update ==
Here's the above JSFiddle, improved by passing parameters to the Action. The event propagation seems to get halted in the Action resulting in the inputs not getting properly marked. Radio buttons loose their grouping, and checkboxes do not get checked.
Ember can easily handle what you're doing here. First it's easier to keep your scope and generate named each loops.
<form {{action 'answerSupplied'}}>
{{#each question in model.questions}}
<h3>{{question.text}}</h3>
{{#each answer in question.answers}}
{{input type=question.type answerId=answer.id data-bind-questionNum=question.id placeHolder=answer.text}}
{{/each}}
{{/each}}
</form>
You may have to do some if statements for labels etc around your input statements.
http://emberjs.jsbin.com/zofoqeje/1/edit
I'm new to Ember and am finding some of their concepts a bit opaque. I have a app that manages inventory for a company. There is a screen that lists the entirety of their inventory and allows them to edit each inventory item. The text fields are disabled by default and I want to have an 'edit item' button that will set disabled / true to disabled / false. I have created the following which renders out correctly:
Inv.InventoryitemsRoute = Ember.Route.extend({
model: function(params) {
return Ember.$.getJSON("/arc/v1/api/inventory_items/" + params.location_id);
}
<script type="text/x-handlebars" data-template-name="inventoryitems">
{{#each}}
<div class='row'>
<p>{{input type="text" value=header disabled="true"}}</p>
<p>{{input type="text" value=detail disabled="true"}}</p>
<button {{action "editInventoryItem" data-id=id}}>edit item</button>
<button {{action "saveInventoryItem" data-id=id}}>save item</button>
</div>
{{/each}}
</script>
So this renders in the UI fine but I am not sure how to access the specific model to change the text input from disabled/true to disabled/false. If I were just doing this as normal jQuery, I would add the id value of that specific model and place an id in the text input so that I could set the textfield. Based upon reading through docs, it seems like I would want a controller - would I want an ArrayController for this model instance or could Ember figure that out on its own?
I'm thinking I want to do something like the following but alerting the id give me undefined:
Inv.InventoryitemsController=Ember.ArrayController.extend({
isEditing: false,
actions: {
editInventoryItem: function(){
var model = this.get('model');
/*
^^^^
should this be a reference to that specific instance of a single model or the list of models provided by the InventoryitemsRoute
*/
alert('you want to edit this:' + model.id); // <-undefined
}
}
});
In the Ember docs, they use a playlist example (here: http://emberjs.com/guides/controllers/representing-multiple-models-with-arraycontroller/) like this:
App.SongsRoute = Ember.Route.extend({
setupController: function(controller, playlist) {
controller.set('model', playlist.get('songs'));
}
});
But this example is a bit confusing (for a couple of reasons) but in this particular case - how would I map their concept of playlist to me trying to edit a single inventory item?
<script type="text/x-handlebars" data-template-name="inventoryitems">
{{#each}}
<div class='row'>
<p>{{input type="text" value=header disabled="true"}}</p>
<p>{{input type="text" value=detail disabled="true"}}</p>
<button {{action "editInventoryItem" this}}>edit item</button>
<button {{action "saveInventoryItem" this}}>save item</button>
</div>
{{/each}}
</script>
and
actions: {
editInventoryItem: function(object){
alert('you want to edit this:' + object.id);
}
}
Is what you need. But let me explain in a bit more detail:
First of all, terminology: Your "model" is the entire object tied to your controller. When you call this.get('model') on an action within an array controller, you will receive the entire model, in this case an array of inventory items.
The {{#each}} handlebars tag iterates through a selected array (by default it uses your entire model as the selected array). While within the {{#each}} block helper, you can reference the specific object you are currently on by saying this. You could also name the iteration object instead of relying on a this declaration by typing {{#each thing in model}}, within which each object would be referenced as thing.
Lastly, your actions are capable of taking inputs. You can declare these inputs simply by giving the variable name after the action name. Above, I demonstrated this with {{action "saveInventoryItem" this}} which will pass this to the action saveInventoryItem. You also need to add an input parameter to that action in order for it to be accepted.
Ok, that's because as you said, you're just starting with Ember. I would probably do this:
<script type="text/x-handlebars" data-template-name="inventoryitems">
{{#each}}
<div class='row'>
<p>{{input type="text" value=header disabled=headerEnabled}}</p>
<p>{{input type="text" value=detail disabled=detailEnabled}}</p>
<button {{action "editInventoryItem"}}>edit item</button>
<button {{action "saveInventoryItem"}}>save item</button>
</div>
{{/each}}
</script>
with this, you need to define a headerEnabled property in the InventoryitemController(Note that it is singular, not the one that contains all the items), and the same for detailEnabled, and the actions, you can define them also either in the same controller or in the route:
App.InventoryitemController = Ember.ObjectController.extend({
headerEnabled: false,
detailEnabled: false,
actions: {
editInventoryItem: function() {
this.set('headerEnabled', true);
this.set('detailEnabled', true);
}
}
});
that's just an example how you can access the data, in case the same property will enable both text fields, then you only need one, instead of the two that I put . In case the 'each' loop doesn't pick up the right controller, just specify itemController.
Based on dropdown selected i.e if B is selected the template has to be modified for B.
Template -
<script type="text/x-handlebars" id="search">
...
<div class="controls">
<select class="input-medium focused">
<option>Any</option>
<option>A</option>
<option {{action 'chosenB'}} >B</option>
<option>C</option>
<option>D</option>
</select>
</div>
{{#if searchB}}
//Show view specific to B-only
{{/if}}
</script>
Router -
App.Router = Ember.Router.extend({
this.resource('search');
});
SearchController = Ember.ObjectController.extend({
searchB: false,
chosenB: function() {
this.set('searchB', true);
},
});
So, when I goto URL /search, intially B's only view is not shown as IF condition is not met. But, when a user selects B from dropdown, I have called action chosenB of SearchController from template which should have set the 'searchB" to true and B-only view should have appeared which is not happening..
Can you please help finding mistake here ..
Ember - 1.0.0-RC.2
Ember.js has a built-in Select view, please check out this doc http://emberjs.com/api/classes/Ember.Select.html, I think your problem is binding related, using the right component for the job would have the desired behaviour.
hope it helps
I want to achieve a very simple thing with a contenteditable div. Let us take this simple example:
<script type="text/x-handlebars">
<div contenteditable>{{MyApp.president.fullName}}</div>
</script>
I want the MyApp.president.fullname's value to change when I edit the content of the div. Does Ember have a way to do that? Or I have to observe the changes of the div's content and set the property with Ember.set?
I need all this to build a WYSIWYG editor.
You should use Ember.TextField, with which you can bind values both ways:
{{view Ember.TextField valueBinding="MyApp.president.fullName"}}
Using a textfield, when you change MyApp.president.fullName will update the textfield. When you change the value of the textfield it will update MyApp.president.fullName.
If you want to be able to edit any element you can do it like this:
Template:
{{#if MyApp.isEditing}}
{{view App.InlineTextField valueBinding="MyApp.president.name"}}
{{else}}
{{#view App.TextView}}
{{MyApp.president.name}}
{{/view}}
{{/if}}
Views:
App.InlineTextField = Ember.TextField.extend({
focusOut: function() {
MyApp.set('isEditing', false);
}
});
App.TextView = Ember.View.extend({
doubleClick: function() {
MyApp.set('isEditing', true);
}
});