I'm trying to add the Product Name, Product SKU, and Order shipment method, to the Sales Order Grid.
this is how my function looks:
protected function _prepareCollection()
{
echo $collection = Mage::getResourceModel($this->_getCollectionClass())
->join(
'sales/order_item',
'`sales/order_item`.order_id=`main_table`.entity_id',
array(
'skus' => new Zend_Db_Expr('group_concat(`sales/order_item`.sku SEPARATOR ",")'),
'names' => new Zend_Db_Expr('group_concat(`sales/order_item`.name SEPARATOR ",")'),
)
)
->join(
'sales/order',
'`sales/order`.entity_id=`main_table`.entity_id',
array(
'shipping_description' => 'shipping_description'
)
);
echo $collection->getSelect();
$collection->getSelect()->group('entity_id');
$this->setCollection($collection);
return parent::_prepareCollection();
}
but this gives this error:
SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'entity_id' in-group statement is ambiguous
Probably because there are two entitity_ids in the main_table
.
Is there a way to fix this?
Best Answer
$collection->getSelect()->group('entity_id');
Entity_id is the PK name for many tables. You should specify the table name as well:
$collection->getSelect()->group('maint_table.entity_id');
also, see:
$collection->getSelect()
copy-paste the query to mysql so you understand more the underlying issue.