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Backbonejs does not return all the models into the collection

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Backbonejs does not return all the models into the collection

the json returns the right number of records, but not all of them end up in the collection
 
To solve this problem you can try

checking whether there are duplicate IDs in the returned JSON — there must not be any.

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Lectures and tutorial on "Scripting client side JavaScript, jqvery, BackBone"

Terms: Scripting client side JavaScript, jqvery, BackBone

javascript single page client
JS Memory Management
Introduction to JavaScript
Alternative browser technologies
Books on JS, HTML / CSS
JavaScript Reference and Specs
Installing browsers, JS-console
Support for older javascript browsers
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Code structure JavaScript
Javascript variables
Variable names in javascript
Introduction to data types
Key operators
Comparison Operators and Boolean Values
Bitwise operators
User interaction: alert, prompt, confirm
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While, for loops
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Switch design
Javascript functions
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Type conversion for primitives
Objects as associative arrays
Arrays with numeric indices
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Construction "with"
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Own objects: constructors and methods
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Object conversion: toString and valueOf
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