How to pass parameter to Ext.data.Store? - extjs

Question

I am using following code:
var genres1 = new Ext.data.Store({
reader: new Ext.data.JsonReader({
fields: ['pincode','place_name'],
root: 'rows'
}),
proxy: new Ext.data.HttpProxy({
url: 'pointalong.php',
method: 'GET'
})
});
but i want to pass 3 parameters to my php file. how should i proccess? and also how would i get at php file.

Answer 1

There are two possibilities. The first one is to use store baseParams config:
var genres1 = new Ext.data.Store({
baseParams: {
param1: 'value1',
param2: 'value2'
},
// ...
The second one is to send them when you are using load method:
genres1.load({params: {param2: 'anotherValue'}});
Note: params will override any baseParams of the same name
So if you setup store with baseParams like in example above and then use load with params the store will request ...?param1=value1&param2=anotherValue.
... and also how would i get at php file
As usual variable passed via the URL parameters - using $_GET:
$param1 = $_GET['param1'];

Answer 2

I use this and it works perfectly
Ext.define('store.odon.DiagnosticoStore', {
extend : 'Ext.data.Store',
model : 'model.odont.DiagnosticoModel',
proxy: {
type: 'ajax',
api: {
create: CONTEXT_PATH + '/mvc/odona/crear',
read: CONTEXT_PATH + '/mvc/odon/lista',
update: CONTEXT_PATH + '/mvc/odon/update',
destroy: CONTEXT_PATH + '/mvc/odon/delete'
},
reader: {
type: 'json',
root: 'diagnosticos',
successProperty: 'success'
},
writer: {
type: 'json',
writeAllFields: true,
encode: true,
root: 'diagnosticos'
}
}
});
the parameter is assigned to load the store
var storeDiagnostico= getStore(); // Ext.create('store.odon.DiagnosticoStore');
storeDiagnostico.getProxy().setExtraParam("idOdontologia", value);
storeDiagnostico.load();

Answer 3

If the value of the parameter may change (for example, if it comes from another form field), then the most reliable way is to apply the proxy parameter before the load event each time the store loads, as follows:
Ext.create('Ext.data.Store', {
...
listeners:{
beforeload: function(store){
var filterText = Ext.getCmp('filterText').value;
store.getProxy().setExtraParam("filterText", filterText);
}
},