Editable values don't send from Grid Panel to php-script

[Shady-sister]

Hi! I have an editable Grid using php+mysql. When I try to edit cell, I have an empty $_POST.
Scrinshot from firebug (+ result from edit.php with var_dump($_POST)):
1.jpg
2.jpg
view.js:

Ext.onReady(function() {    var cols = [
    { dataIndex: 'id', header: 'id', hidden: true },
    { dataIndex: 'title', header: 'Title', width: 200, editor: 'textfield' },
    { dataIndex: 'author', header: 'Author', width: 200, editor: 'textfield' },
    { dataIndex: 'isbn', header: 'ISBN', width: 100, editor: 'numberfield' },
],


    fields = [];
        for(var i=0; i<cols.length; i++) {
        fields.push(cols[i].dataIndex);
    }


Ext.define('Book', {
    extend: 'Ext.data.Model',
    fields: fields
});


var store = Ext.create('Ext.data.JsonStore', {
    model: 'Book',
    proxy: {
        type: 'ajax',
        actionMethods: {
            create: 'POST',
            read: 'POST',
            update: 'POST',
            destroy: 'POST'
        },
        api:{
        read: 'view.php',
        update: 'edit.php'
        }},
        reader: {
            type: 'json'
            //root: 'data' 
        },
        writer: new Ext.data.writer.Json({
            writeAllFields: true
       })
        
});


Ext.create('Ext.grid.Panel', {
    columns: cols,
    tbar: [
          {
            text: 'Save',
            handler: function(){
                //var up = getUpdatedRecords();
                store.sync()
            }
        }
    ],


    width: 520,
    style: 'margin-top: 5%; margin-left: 35%',
    plugins: [
        Ext.create('Ext.grid.plugin.CellEditing', {
            clicksToEdit: 2
        })
    ],
    renderTo: Ext.getBody(),
    store: store
});
store.load();


});

view.php

<?php
require_once 'db.php';
$result = mysql_query('SELECT * FROM books');
while ($row = mysql_fetch_assoc($result)) {
    for ($i=0; $i < mysql_num_fields($result); $i++) {       
 $meta = mysql_fetch_field($result, $i);        }    
$rows[] = $row;
}
print (json_encode($rows));

?>

edit.php

<?php
require_once 'db.php';   
 ini_set('display_errors', 1);error_reporting(E_ALL);
var_dump($_POST);?>

Help me please with my problem! Thank you.

[Shady-sister]

Ext.create('Ext.grid.plugin.CellEditing', {            clicksToEdit: 2,            listeners: {                'edit': function (editor,e) {                    var grid = e.grid;                    var record = e.record;                    /*console.log(record.data.id);                    console.log(record.data.title);                    console.log(record.data.author);                    console.log(record.data.isbn);                    var res = [];                    res.push(record.data.id);                    res.push(record.data.title);                    res.push(record.data.author);                    res.push(record.data.isbn);                    console.log(res);*/                    Ext.Ajax.request({                        url: 'edit.php',                        method: 'POST',                        params: {                            id: record.data.id,                            title: record.data.title,                            author: record.data.author,                            isbn: record.data.isbn                        }                    }                )}            }