Rails 3.1, Postgres 9.1.4, unknown hstore operator error

I am trying to add an hstore column to an existing STI model.

Like Postgres, HStore Errors is an unknown operator , but as far as I can tell, I've installed the hstore extension. I dumped the database and rebuilt it from migration with no errors, but the specs still don't work.

Mac OS X 10.8.2
Rails 3.1.10
psql (PostgreSQL) 9.1.4

      

        
        
        
      

    

user.rb

has_many :targets

def complete_targets
  targets.where("data @> (:key => :value)", key: 'complete', value: 'true')
end

      

        
        
        
      

    

targets.rb

belongs_to :user
serialize :data, ActiveRecord::Coders::Hstore

      

        
        
        
      

    

setup_hstore:

class SetupHstore < ActiveRecord::Migration
  def self.up
    execute "CREATE EXTENSION IF NOT EXISTS hstore"
  end

  def self.down
    execute "DROP EXTENSION IF EXISTS hstore"
  end
end

      

        
        
        
      

    

Add data column wrap:

class AddDataToRecords < ActiveRecord::Migration
  def change
    add_column :records, :data, :hstore
  end
end

      

        
        
        
      

    

Add index migration:

class AddHstoreIndexes < ActiveRecord::Migration
  def up
    execute "CREATE INDEX records_gin_data ON records USING GIN(data)"
  end

  def down
    execute "DROP INDEX records_gin_data"
  end
end

      

        
        
        
      

    

Mistake:

ActiveRecord::StatementInvalid:
PG::Error: ERROR:  operator does not exist: unknown => unknown
LINE 1: ...records"."user_id" = 244 AND (data @> ('complete' => 'true')...

      

        
        
        
      

    

Navicat output when trying to create an extension via direct request:

CREATE EXTENSION hstore Error : ERROR:  extension "hstore" already exists