Rails array column field not creating [duplicate]

I read all about this and how there are transactional issues in updating an array column but mine wont even create.

class Recipe < ActiveRecord::Base
  serialize :steps
  ...
end

Migration

add_column :recipes, :steps, :text, array:true, default: []

Output

$ r = Recipe.create(steps: [1,2,3])
> #<Recipe:0x007fe38ae68870 id: 27, ..., steps: [], ingredients: []>

Also played around with this method with no luck:

def add_steps(steps)
  steps_will_change!
  update_attributes steps: self.steps + steps
end