CODEWITHSUNDEEP
ruby-on-rails
Blankman
Blankman

Reputation: 266978

Can you make an optional model attribute required for a form?

Is it possible to make a attribute required just for a particular form?

The field is nullable in the model, and there is no validation setup for it currently and I want to keep it that way.

But on 1 form, I would like to make the field required.

Is this possible without creating a separate model for this?

Upvotes: 0

Views: 633

Answers (2)

xploshioOn
xploshioOn

Reputation: 4115

I know that you doesn't want to touch the model, but you can do a conditional validation like this that isn't invasive

validates_presence_of :your_attribute, :if => :from_specific_form?

and create some methods that work with this

private

def from_form
  @from_specific_form = true
end

def from_specific_form?
  @from_specific_form
end

Then when you want the validation to work, just do something like this

xyz = YourModel.new
xyz.from_form

Upvotes: 0

Holger Frohloff
Holger Frohloff

Reputation: 1705

You could use ActionControllers require for the used parameters, something like this:

def person_params
  params.require(:person).permit(:name).tap do |person_params|
    person_params.require(:name) # SAFER
  end 
end

http://api.rubyonrails.org/classes/ActionController/Parameters.html#method-i-require

Does that help you?

Upvotes: 1

Related Questions