Rails: Iterate dynamically over params hash to verify they exist -

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i've got form quite bit of params being passed controller processing. different 'sets' of params named in similar fashion:

setname1_paramname setname1_paramname2

now, need check 1 of these 'sets' verify of fields submitted. right now, i'm doing manual if or style statement:

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

is there way programmatically loop on these params, , add them @object errors?

thanks!

since sounds have ton of params , seems need able checks on groups of params, maybe useful? basically, iterate on params hash, , use regular expressions target sets of params. then, inside loop, can sort of validations:

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

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