ActiveRecord enum returning nil, even if it has a value

Question

I have an enum, which has a stored value, but the getter returns nil.

I have the following code:

class Property < ActiveRecord::Base
  enum building_type:   [
    :none_building_type, :pre_war_low_rise, :pre_war_mid_rise,
    :pre_war_high_rise, :post_war_low_rise, :post_war_mid_rise,
    :post_war_high_rise, :pre_war_loft, :post_war_loft, :pre_war_hotel,
    :post_war_hotel
  ]

If I do the following in the console:

Property.last

I get

Property Load (0.8ms)  SELECT  "properties".* FROM "properties"   ORDER BY "properties"."id" DESC LIMIT 1
 => #<Property id: 3, created_at: "2014-11-17 15:39:34", updated_at: "2014-11-17 16:28:48", name: "PropertyName", property_type: 1, description: "adsdsaads", building_type: "4">

but If I do

Property.last.building_type

I get

 Property Load (0.5ms)  SELECT  "properties".* FROM "properties"   ORDER BY "properties"."id" DESC LIMIT 1
 => nil 

Answer 1

It looks like your field type for the database entry of building_type is a String, instead of an Integer (which is what enum is mapping to according to the documents). Try to change the database schema and it should work.