destroy :Destroys the model on the server by using the
Backbone.sync.
Syntax :model.destroy()
Example
Syntax :model.url()
Example
Output :
/tutorialspoint/backbonejs
Backbone.sync.
Syntax :model.destroy()
Example
<!DOCTYPE
html>
<html>
<head>
<script
src="https://code.jquery.com/jquery-2.1.3.min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script>
<script
type="text/javascript">
Backbone.sync
= function
(method, model)
{
document.write(method
+ ":
"
+ JSON.stringify(model) + '');
model.set('id',
1);
};
var
student = new
Backbone.Model
({
name:
"john",
class:
4
});
student.save();
student.destroy();
</script>
</head>
</html>
Output :
create: {"name":"john","class":4}
delete: {"name":"john","class":4,"id":1}
delete: {"name":"john","class":4,"id":1}
validate :This method is undefined and you can write your custom validation logic with the help of JavaScript
Syntax : model.validate(attributes, options)
Example
<!DOCTYPE
html>
<html>
<head>
<script
src="https://code.jquery.com/jquery-2.1.3.min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
type="text/javascript"></script>
<script
type="text/javascript">
var
student = Backbone.Model.extend({
defaults:
{
name:
'john',
age:
2
},
validate:
function
(attrs)
{
if
(attrs.name)
{
if
(attrs.name.length < 5)
{
document.write('Please
enter your full name.');
}
}
if
(attrs.age)
{
if
(attrs.age < 18)
{
document.write('You
are less than 18.');
}
}
}
});
var
stuObj = new
student();
stuObj.set({
age: '2'
}, { validate: true
});
</script>
</head>
</html>
Output :
Please enter your full name.
You are less than 18.
You are less than 18.
isValid :Validation check for model state.
Syntax : model.isValid()
Example
<!DOCTYPE
html>
<html>
<head>
<script
src="https://code.jquery.com/jquery-2.1.3.min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
type="text/javascript"></script>
<script
type="text/javascript">
var
student = Backbone.Model.extend({
defaults:
{
name:
'john',
age:
2
},
validate:
function
(attrs)
{
if
(attrs.name)
{
if
(attrs.name.length < 5)
{
document.write('Please
enter your full name.');
}
}
if
(attrs.age)
{
if
(attrs.age < 18)
{
document.write('You
are less than 18.');
}
}
}
});
var
stuObj = new
student();
stuObj.set({
name:'John2',age:
'19'},
{ validate: true
});
if
(stuObj.isValid())
{
document.write('You
model is valid.');
}
</script>
</head>
</html>
Output :
You model is valid.
url : Returns the relative URL where the model's resource is located.
Syntax :model.url()
Example
<!DOCTYPE
html>
<html>
<head>
<script
src="https://code.jquery.com/jquery-2.1.3.min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
type="text/javascript"></script>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
type="text/javascript"></script>
<script
type="text/javascript">
var
student = Backbone.Model.extend({
urlRoot:
'/tutorialspoint/backbonejs'
});
var
stuObj = new
student();
document.write(stuObj.url());
</script>
</head>
</html>
/tutorialspoint/backbonejs
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