GroceryCrud 使用 where 子句设置 nn 关系

Question

I have three tables (simplified) which are:

And I have to display all houses for each user.
In my controller I have a function like this:

public function create_houses_table($usr_id)
{
  $crud = new grocery_CRUD();

  $crud->set_language("italian");

  $crud->set_theme('datatables');
  $crud->set_subject('Casette');
  $crud->set_table('tbl_houses');

  $crud->set_relation_n_n('Casette', 
                          'tbl_users_houses', 
                          'tbl_users', 
                          'house_id', 
                          'user_id', 
                          'usr_name',
                          NULL,
                          array('user_id' => $usr_id));
...
}

and what I get is this:

Every time I select a user from the combo I need to refresh my list filtering on usr_id... but I get always all the houses .

What I'm wrong?

Answer 1

This is not the intended usage for set_relation_n_n (it will show all the user houses in one field inside the user row).

What you want can be better done listing from tbl_users_houses, filtering by client with $crud->where() and linking with the other tables with two simple relations.

Answer 2

If I understand correctly you are trying to fetch only the records for the logged in User... and u have multiple users per house , hence the nn relation.

I also faced this problem and here's what I did.

        $myprojects = $this->admin_model->get_employee_projects($this->user_id);
        $myprojectids = array_column($myprojects, 'id');
        //get only one column from the multi-dimensional array
        $crud->where("`projects`.id IN", "(" . implode(",", $myprojectids) . ")", false); 
        // the false disables escaping

        $crud->set_relation_n_n('assigned_employees', 'project_employees', 'employees', 'project', 'employee', 'name');
        //Only so it also still shows the name of Users assigned

So basically projects here is like houses, and I am using the WHERE IN clause to filter the records based on the projects I get from my model method...