Question

I’ve got a form with quite a bit of params being passed to the controller for processing. The different ‘sets’ of params are named in a similar fashion:

setname1_paramname
setname1_paramname2

Now, I need to check one of these ‘sets’ to verify that all of the fields are submitted. Right now, I’m doing this with a manual If Or style statement:

if setname1_paramname.blank? || setname1_paramname2.blank? || ...etc
  @object.errors.add_to_base("All setname1 fields are required.").
  render :action => 'new'
  return false
end

Is there way to programmatically loop over these params, and add them to the @object errors?

Thanks!

Answer 1

Since it sounds like you have a ton of params and also seems like you need to be able to do checks on groups of params, maybe something like this would be useful? Basically, iterate over the params hash, and use regular expressions to target sets of params. Then, inside the loop, you can do any sort of validations:

params.each do |key, value| 
   # target groups using regular expressions
   if (key.to_s[/setname1.*/])
     # whatever logic you need for params that start with 'setname1'
     if param[key].blank?
       @object.errors.add_to_base("All setname1 fields are required.").
     end
   end
end