Is possible to join two tables if it don't have relationship?

[sheldygg]

I want create table where I want show columns from different tables and they don't have relationship. This is possible?

[sheldygg]

In order to implement this I had to override the methods: list_query, get_list_value, list, count_query: in the ModelView class, and remake the template for the list, this turned out to be quite difficult :((((