Grid store config throws "Uncaught TypeError: Cannot read property 'buffered' of undefined" - search

Question

I have form and grid. the user must enter data in form fields then display related records in the grid.
I want to implement a search form, e.g: user will type the name and gender of the student,
then will get a grid of all students have the same name and gender.
So, I use Ajax to send form fields value to PHP and then create a json_encode which will be used in grid store.
I am really not sure if my idea is good. But I haven't found another way to do that.
The problem is there is a mistake in my store but I couldn't figure out what it is. I get this error:
Uncaught TypeError: Cannot read property 'buffered' of undefined
My View:
{
xtype: 'panel',
layout: "fit",
id: 'searchResult',
flex: 7,
title: '<div style="text-align:center;"/>SearchResultGrid</div>',
items: [{
xtype: 'gridpanel',
store: 'advSearchStore',
id: 'AdvSearch-grid',
columns: [{
xtype: 'gridcolumn',
dataIndex: 'name',
align: 'right',
text: 'name'
}, {
xtype: 'gridcolumn',
dataIndex: 'gender',
align: 'right',
text: 'gender'
}
],
viewConfig: {
id: 'Arr',
emptyText: 'noResult'
},
requires: ['MyApp.PrintSave_toolbar'],
dockedItems: [{
xtype: 'PrintSave_tb',
dock: 'bottom',
}]
}]
}
My Controller:
.
.
.
xmlhttp.open("GET","AdvSearch.php?search_name="+search_name,true);
xmlhttp.send(null);
My PHP script:
if (!$con) {
throw new Exception("Error in connection to DB");
}
$query ="SELECT name, gender FROM students WHERE name ILIKE '%$search_name%' ";
$result = pg_query($query);
while ($row = pg_fetch_array($result)) {
$Arr[] = array('name' => $row[0], 'gender' => $row[1]);
}
$searchResult_list = array();
$searchResult_list['success'] = true;
$searchResult_list['Arr'] = $Arr;
$searchResult_list['totalCount'] = count( $searchResult_list['Arr'] );
echo json_encode($searchResult_list);
if (!$result)
die("Error in query: " . pg_last_error());
pg_close($con);
My Store, Model:
Ext.define('AdvSearchPost', {
extend: 'Ext.data.Model',
proxy: {
type: 'ajax',
url: 'AdvSearch.php',
reader: {
type: 'json',
root: 'Arr',
totalProperty: 'totalCount'
}
},
fields: [{
name: 'name'
}, {
name: 'type_and_cargo'
}
]
});
advSearchStore = Ext.create('Ext.data.Store', {
pageSize: 10,
model: 'AdvSearchPost'
});

Answer 1

Well it is just a typo of your storename.
The error Uncaught TypeError: Cannot read property 'buffered' of undefinedonly indicates that the store could not be bound. It may be a bit misleading.
Try the grid with either
store: advSearchPost
or
store: Ext.StoreMgr.lookup('AdvSearchPost') // if in any form a controller takes care about your store
and it will work.
Edit
I guess you haven't any controller so I recommend you to create your store like this
Ext.create('Ext.data.Store', {
pageSize: 10,
model: 'AdvSearchPost',
storeId: 'AdvSearchPost'
});
That will enable you to receive the store by the StoreManager from everywhere (after it is created). That will also enable the last statement to work without any controller.

Answer 2

Even if you call like this..
store: Ext.StoreMgr.lookup('bla bla bla') won't throw any error in the console.
Replace store parameter with storeId and then assign your actual store to it which will connect to your actual store. storeId:advSearchPost