From b842642b574a2b95c53b791308ed1bf8ff9d304d Mon Sep 17 00:00:00 2001
From: Igor Minar
Date: Wed, 15 Jun 2011 22:31:40 -0700
Subject: docs - stripping extra new lines
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@name Developer Guide: About MVC in Angular: Understanding the Model Component
@description
-
Depending on the context of the discussion in angular documentation, the term _model_ can refer to
either a single object representing one entity (for example, a model called "phones" with its value
being an array of phones) or the entire data model for the application (all entities).
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In angular, a model is any data that is reachable as a property of an angular {@link
dev_guide.scopes Scope} object. The name of the property is the model identifier and the value is
any JavaScript object (including arrays and primitives).
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The only requirement for a JavaScript object to be a model in angular is that the object must be
referenced by an angular scope as a property of that scope object. This property reference can be
created explicitly or implicitly.
-
You can create models by explicitly creating scope properties referencing JavaScript objects in the
following ways:
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* Make a direct property assignment to the scope object in JavaScript code; this most commonly
occurs in controllers:
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function MyCtrl() {
// create property 'foo' on the MyCtrl's scope
// and assign it an initial value 'bar'
this.foo = 'bar';
}
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* Use an {@link dev_guide.expressions angular expression} with an assignment operator in templates:
-
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* Use {@link api/angular.directive.ng:init ng:init directive} in templates (for toy/example apps
only, not recommended for real applications):
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Angular creates models implicitly (by creating a scope property and assigning it a suitable value)
when processing the following template constructs:
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* Form input, select, and textarea elements:
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The code above creates a model called "query" on the current scope with the value set to "fluffy
cloud".
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* An iterator declaration in {@link api/angular.widget.@ng:repeat ng:repeater}:
-
-
The code above creates one child scope for each item in the "phones" array and creates a "phone"
object (model) on each of these scopes with its value set to the value of "phone" in the array.
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In angular, a JavaScript object stops being a model when:
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* No angular scope contains a property that references the object.
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* All angular scopes that contain a property referencing the object become stale and eligible for
garbage collection.
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The following illustration shows a simple data model created implicitly from a simple template:
-
-
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## Related Topics
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* {@link dev_guide.mvc About MVC in Angular}
* {@link dev_guide.mvc.understanding_controller Understanding the Controller Component}
* {@link dev_guide.mvc.understanding_view Understanding the View Component}
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## Related Topics
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* {@link dev_guide.mvc About MVC in Angular}
* {@link dev_guide.mvc.understanding_controller Understanding the Controller Component}
* {@link dev_guide.mvc.understanding_view Understanding the View Component}
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