RailsAdmin Gem - Customize multi-select dropdown with conditional values only

Question

We have implemented gem 'rails_admin', '~> 1.4.3' in our application. The issue we are facing here is in customizing the output values in the multi-select dropdown in rails admin.

For example: Student has many Teachers. So while creating a Student record we will have a multi-select dropdown of Teachers. Here we only want those Teachers who are in active state, not all the teachers.

To achieve the same, we have implemented something like below in the student_admin.rb file.

create do
  field :name do
    required true
  end

  field :teachers do
    visible do
      Teacher.where(state: 'active')
    end
  end
end

The above code neither gives any error nor filters the only active teachers.

Can someone help to get the expected result here. Any suggestion will be highly appreciated.

Answer 1

There you go:

edit do
  field :name do
    required true
  end

  field :teachers do
    associated_collection_scope do
      proc { |scope| scope.where(state: 'active') }
    end
  end
end