我有这张桌子
class CreateEvents < ActiveRecord::Migration
def self.up
create_table :events do |t|
t.integer :subcategory
t.string :event_name
t.text :description
t.string :location
t.date :date
t.decimal :price
t.timestamps
end
end
def self.down
drop_table :events
end
end
我希望将子类别更改为subcategory_id。我尝试了这个,但没有工作
ruby脚本/生成迁移RenameDatabaseColumn,然后我转到db \ migrate中的文件并编辑为这样
class RenameDatabaseColumn < ActiveRecord::Migration
def self.up
rename_column :events, :subgategory, :subgategory_id
end
def self.down
# rename back if you need or do something else or do nothing
end
end
然后我运行命令rake db:migrate put列仍然是子类别。你能帮我吗?我正在使用rails 2.0
谢谢
答案 0 :(得分:11)
你拼错了列名吗?不是:subcategory
吗?你写了:subgategory
。
class RenameDatabaseColumn < ActiveRecord::Migration
def self.up
rename_column :events, :subcategory, :subcategory_id
end
def self.down
# rename back if you need or do something else or do nothing
end
end