在我的應用程序,我編輯這裏顯示遷移文件:schema.rb文件沒有更新
class CreateUsers < ActiveRecord::Migration
def change
create_table :users do |t|
t.string :first_name
t.string :last_name
t.string :dj_alias
t.boolean :site_admin
t.integer :station_id
t.string :byline
t.string :bio
t.timestamps null: false
end
end
end
有生物和署名領域。但是,當我運行rake db:reset時,schema.rb文件中沒有更改。我看到的唯一錯誤,有這個代碼塊:
ActiveRecord::Base.connection.tables.each do |table|
result = ActiveRecord::Base.connection.execute("SELECT id FROM #{table} ORDER BY id DESC LIMIT 1") rescue (puts "Warning: not procesing table #{table}. Id is missing?" ; next)
ai_val = result.any? ? result.first['id'].to_i + 1 : 1
puts "Resetting auto increment ID for #{table} to #{ai_val}"
ActiveRecord::Base.connection.execute("ALTER SEQUENCE #{table}_id_seq RESTART WITH #{ai_val}")
end
在seeds.rb文件,其目的是要處理的種子文件的索引的底部。當我運行rake db:reset時,第一行的rescue語句顯示:Warning:not procesing table schema_migrations。編號缺失?
我想我很困惑,爲什麼這句話能拯救這個?儘管看起來可能是原因,但是在訪問seeds.rb文件之前是否發生了schema.rb重置?
這裏是耙分貝的輸出:遷移:狀態
Status Migration ID Migration Name
--------------------------------------------------
up 20150225041954 Create songs
up 20150225042739 Create albums
up 20150225043102 Create artists
up 20150225043854 Create playlists
up 20150225044118 Create users
up 20150225044314 Create stations
up 20150225061259 Create featured artists
up 20150225153938 Add devise to users
up 20150225200646 Create reviews
up 20150321171830 Stations users
up 20150323200255 Add last fm to album
up 20150323200432 Add last fm to artist
up 20150323200513 Add last fm to song
up 20150325052314 Albums stations
up 20150325061241 Playlist songs
up 20150327172516 Add image url to albums
up 20150327172532 Add image url to artists
我沒有嘗試過,是否有可能需要運行rake db:rollback多次? –
我在rake db:migrate:status的輸出中編輯了我的原始問題 –
有關如何回滾特定遷移的信息,請參閱http://stackoverflow.com/a/6635407/429758。 –