Rails 4 simple_form has_many through check boxes not saving

Question

I am trying to implement an employee recurrent deductions table through check boxes using simple_form. My code works but the selected recurrent deductions are not saved in my table. I can't work out why. Here are my models. ``` class Employee < ActiveRecord::Base belongs_to :club has_many :employee_recurrents has_many :recurrents, :through => :employee_recurrents end class Recurrent < ActiveRecord::Base belongs_to :club has_many :employee_recurrents has_many :employees, :through => :employee_recurrents end class EmployeeRecurrent < ActiveRecord::Base belongs_to :employee belongs_to :recurrent end ``` migration ``` class CreateEmployeeRecurrents < ActiveRecord::Migration def change create_table :employee_recurrents, :id => false do |t| t.references :employee t.references :recurrent end add_index :employee_recurrents, [:employee_id, :recurrent_id] add_index :employee_recurrents, [:recurrent_id, :employee_id] end end ``` form ``` <%= simple_form_for @employee, html: {class: 'form-horizon…

Accepted Answer

I needed the following strong params

```
def employee_params
  params.require(:employee).permit(:first_name, :recurrent_ids => [])
end
```

Rails 4 simple_form has_many through check boxes not saving

Solution

Problem