Ruby on Rails object serialization

Question

I have an items object which is a hash and I want to store it in database table.

Migration:

t.string :items

Writing:

items: items.to_json

Reading:

@order.items  # returns a string, not a hash as needed.

How do I solve this?

Everything is an object in Ruby! ;)

Andrew Marshall
– Andrew Marshall

2011-09-28 05:30:42 +00:00
Commented Sep 28, 2011 at 5:30 — Andrew Marshall
– Andrew Marshall, Commented Sep 28, 2011 at 5:30

Arsen7 · Accepted Answer · 2011-09-28 07:17:52Z

1

You should add to your model the serialize declaration:

class Xyzzy < ActiveRecord::Base
  serialize :items
end

Optionally you may specify a class:

serialize :items, Hash

so an exception will be thrown if the 'items' object happens to be of some other class.

Also, the column in the database should be declared as :text, because the default length of the :string column is mere 255 characters, and it may be too short for a serialized object.

edited Sep 28, 2011 at 7:17

answered Sep 28, 2011 at 7:09

Arsen7

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