rails with carrierwave migration error: undefined method `attachment'

Question

I'm using carrierwave gem ( ver. 0.8.0 ). When I make 'rake db:migrate', I see strange error:



    ==  AddAttachmentLogoToMerchants: migrating ===================================
    -- change_table(:merchants)
    rake aborted!
    An error has occurred, this and all later migrations canceled:

    undefined method `attachment' for     ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::Table:0x007f900e6bde88

My migration:




      def self.up
        change_table :merchants  do |t|
          t.attachment :logo
        end
        remove_column :merchants, :logo_filename
      end

      def self.down
        add_column :merchants, :logo_filename, :string
        drop_attached_file :merchants, :logo
      end

How can I solve it?

it not help me, still have 'undefined method `attachment'' – bmalets Apr 24 '13 at 13:10 — bmalets, Apr 24 '13 at 13:10

score 0 · Accepted Answer · answered Apr 24 '13 at 13:26

AFAIK in t.attachment attachment should be a datatype

change_table :merchants  do |t|
  t.attachment :logo
end

Please click here to find datatype list for postgresql If you want string following should work

change_table :merchants  do |t|
  t.string :logo
end

rails with carrierwave migration error: undefined method `attachment'

1 Answers1