Adding STI to Existing Table...
- by keruilin
I want to add STI to an existing table using a custom type column. Let's call this taste_type whose corresponding model is Fruit.
In the Fruit model I have:
set_inheritance_column :taste_type
In my migration to add STI I have:
class AddSTI < ActiveRecord::Migration
def self.up
add_column :fruits, :taste_type, :string, :limit => 100, :null => false
Fruit.reset_column_information
Fruit.find_by_id(1).update_attributes({:taste_type => 'Sour'})
end
def self.down
remove_column :fruits, :taste_type
end
end
When I run the migration, I get the following error:
Mysql::Error: Column 'taste_type' cannot be null: ...
Any idea what's going? I can get the migration to run if I comment the set_inheritance_column in the Fruit model, then uncomment it after I run the migration. Obviously, I don't want to do this, however.
