I'm stuck with adding column to sales order grid from shipment grid. The problem is: "Purchased On" in DB has name "created_at", "Date Shipped" has also name "created_at", so when I join "created_at" from "sales_flat_shipment_grid" I see purchased on date only with name date shipped. I'm using this code: in _prepareCollection()
$collection->getSelect()->joinLeft(array('sfsg'=>'sales_flat_shipment_grid'),'sfsg.order_increment_id=main_table.increment_id',array('sfsg.created_at'));
and in _prepareColumns()
$this->addColumn('created_at', array(
'header' => Mage::helper('sales')->__('Date Shipped'),
'index' => 'created_at',
'type' => 'datetime',
'filter_index'=>'sfsg.created_at',
));
Could you please help me with this?