Question

I want to store an array into a database field.
I tried the following method:

class MyStuff < ActiveRecord::Base  
  serialize :things
end

stuff = MyStuff.new 
stuff.things << "pen" 
stuff.things << "paper"
stuff.save

I get an error: “The error occurred while evaluating nil.<<“

Is there any other approach?

Answer 1

What is “things”. Define it to be Array or Hash or something you want that to be and then add elements to it.

stuff = MyStuff.new 

stuff.things = []
stuff.things << "pen"
..

stuff.save