We would like to add a column displaying all ID groups associatd to customers in the Customer interface.
To add the field to the list of available fields for your grids, click on the in the 'Add a field' panel and enter the following information:
What is the field ID?: group_id
Sc creates the field, you now need to populate the grid with:
Field name: Group ID
Table: Another table
Type: only display
From the Advanced Properties panel on the right handside:
- select the menu SQL Select and enter:
return ' , (SELECT GROUP_CONCAT(cst_cg.id_group) FROM `'._DB_PREFIX_.'customer_group` cst_cg WHERE cst_cg.id_customer = c.id_customer ) AS group_id ';
Exit the editing window.
The new field is now present in the list of available fields and you can add it to your Customer grids.