hello
I’m getting a rake db:migrate error which I can’t understand (newbie).
– add_column(:stories, :votes_count, :integer, {:default=>0})
rake aborted!
Mysql::Error: #42S21Duplicate column name ‘votes_count’: ALTER TABLE
stories ADD
votes_count int(11) DEFAULT 0
(See full trace by running task with --trace)
the error is in
005_add_counter_cache_to_stories.rb
class AddCounterCacheToStories < ActiveRecord::Migration
add_column :stories, :votes_count, :integer, :default => 0
def self.up
Story.find(:all).each do |s|
s.update_attribute :votes_count, s.votes.length
end
end
def self.down
remove_column :stories, :votes_count
end
end
the latest migration file is
006_add_story_creation_date_and_description.rb
class AddStoryCreationDateAndDescription < ActiveRecord::Migration
def self.up
add_column :stories, :created_at, :datetime
add_column :stories, :description, :text
end
def self.down
remove_column :stories, :created_at
remove_column :stories, :description
end
end
here’s schema.db, which I have not touched
ActiveRecord::Schema.define(:version => 5) do
create_table “stories”, :force => true do |t|
t.column “name”, :string
t.column “link”, :string
t.column “permalink”, :string
t.column “user_id”, :integer
t.column “votes_count”, :integer, :default => 0
end
create_table “users”, :force => true do |t|
t.column “login”, :string
t.column “password”, :string
t.column “name”, :string
t.column “email”, :string
end
create_table “votes”, :force => true do |t|
t.column “story_id”, :integer
t.column “created_at”, :datetime
t.column “user_id”, :integer
end
end
(if this looks familiar, it’s b/c I’m working through the examples in a
RoR book)
In an earlier migration file (003) I also have an add_column but rake
doesn’t give me an error. That add_column however does not have a
default value option.
any help is appreciated. thanks in advance.