Array and Hash Iteration in Ruby - Rails -

the params' hash keys mix of camelcase, lowercase , uppercase characters:

params = {"refreshtime"=>"0", "lang"=>"tr", "amount"=>"50", "acqbin"=>"490740"} 

the array, list of 1 of models' column names, lowercase same values keys of params hash =>

columns = ["refreshtime", "lang", "amount", "acqbin", ......] 

i'm trying match hash keys members of array create new record in controller =>

def create_transaction    @transaction = ordertransaction.new(       params.each |k, v|         columns.each |i|           if == k.downcase             "#{i}: params[:#{k}],"           end         end       end     ) end 

but piece of code isn't working expected. seems i'm doing wrong in line of;

#{i}: #{v}

what missing here?

by way, old way job, causes many lines of code =>

@transaction = ordertransaction.new(   refreshtime: params[:refreshtime],   lang: params[:lang],   amount: params[:amount],   acqbin: params[:acqbin],   ... ) 

you this

@transaction = ordertransaction.new(hash[params.map{|k,v|[k.downcase,v]}]) 

this creates new hash lowercase keys , uses initialize ordertransaction.

to include keys appear in columns array

@transaction = ordertransaction.new(hash[params.map{|k,v|[k.downcase,v]}.select{|k,v|columns.include?(k)}])