Rails strong parameters - accepting the virtual attribute

Question

I have ActiveRecord model with persisted name attribute and the virtual attribute.

class MyModel < ActiveRecord::Base

 validates :name, length: { minimum: 1 }, presence: true



 def virtual_attr=(value)

  # set something

 end



 def virtual_attr

  # get something

 end

end

In my controller I am specifying strong parameters:

  def my_model_params

    params.permit(:name, :virtual_attr)

  end

When I am trying to create/update my model,

my_model_params

only contains a name, whilst I know that

params[:virtual_attr]

has the value that I passed to the controller. It seems like it is just getting filtered out. What am I doing wrong?

Answer 1

According to these params

{"name"=>"New", "virtual_attr"=>{"enable"=>"false", "start"=>"false"}, "controller"=>"my_model", "action"=>"create"}

You need to change strong params to:

def my_model_params
  params.permit(:name, virtual_attr: [:enable, :start])
end

Rails strong parameters - accepting the virtual attribute

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