Ruby on rails // Require specific parameters for specific actions

Question

I'm new to rails, i'm trying to create an action for updating an existing record with some required fields. Right now i got something like that:

def assembling_params
      params.require(:device).permit(:assembling_time, :operator_assembling_name)
end

Right now it check if my device param is present and whitelist only 2 attributes and it's working. But how can i do to put these 2 attributes required by my action ? (I don't want to put it in the model validation since these attributes aren't present when i create my object) Thanks

Answer 1

You can specify as many requires as you please.

This may look ugly, but it does the job.

def assembling_params
  device_params = params.require(:device).permit(:assembling_time, :operator_assembling_name)
  device_params.require(:assembling_time)
  device_params.require(:operator_assembling_name)
  device_params
end

Answer 2

Use in appropriate controller:

before_filter :validate_params

And method:

def required_params
[:some_attribute, :another_attribute]
end

def validate_params
unless (require_params - params.keys).count.zero?
  # do something
end