I'm new to Grocery CRUD and I'm trying to implement a multiselect field with 2 boxes, for a n to n relation: one for the selected an the other for the unselected items, exactly like the this example (for the "Actors" field): http://www.grocerycr..._a_relation_n_n
However, after reading extensively the documentation and the examples - and after making tests myself - I only manage to create a dropdown combobox that allows me to select multiple items.
I already tryed applying the field_type method, and it didn't work. It just keeps the standard dropdown with multiple selectable items.
Thank you very much in advance!