What is the best way to determine if certain rows of data have been successfully loaded when working with Ext.data.operation and an ajaxProxy?

Here is the provided code snippet:

Ext.define('Book', {
    extend: 'Ext.data.Model',
    fields: [
        {name: 'id', type: 'int'},
        {name: 'title', type: 'string'},
        {name: 'pages', type: 'int'}, 
        {name: 'numChapters', type: 'int'}
    ]           
});

var ajaxProxy = Ext.create('Ext.data.proxy.Ajax', {
    url: 'books.json',
    model: 'Book'
});

var operation = Ext.create('Ext.data.Operation', {
    action: 'read',
    start: 0,
    limit: 5
});

operation.read();

The file books.json contains 6 rows. When running the code above, all 6 rows are being fetched instead of the expected 5.

ajaxProxy.read(operation, function ()
{
    console.log(operation.response.responseText);
});

Answer №1

The purpose of the limit parameter is often misunderstood. It is utilized in books.json as a way to control dynamic content pages, such as .jsp or .php, by specifying the number of rows to display in the responsetext. If there is no corresponding functionality on the .json page, the limit configuration becomes irrelevant.

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