Creating tables with "variable" field names

Hi All
I’m slowly ramping up on Ruby (Ex-PERL’y), and have the following
question:
*) I’d like to create a table , but with column names which are not
fixed. So instead of doing

def self.up create_table mytable do |t| t.column :field1, :string t.column :field2, :stringI'd like to do

I’d like to do

var1 = "field1" var2 = "field2" def self.up create_table mytable do |t| t.column $var1, :string t.column $var2, :stringWhat is the correct syntax for doing that? Best Regards Kretch