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Rails db migrate

代码示例

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0

rails g迁移添加列 

$ rails generate migration AddDetailsToProducts part_number:string price:decimal
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如何创建迁移rails 

rails g migration AddPartNumberToProducts
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activerecord添加列 

class AddPartNumberToProducts < ActiveRecord::Migration[6.0]
  def change
    add_column :products, :part_number, :string
  end
end
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在rails迁移中使用SQL 

def change
  execute <<-SQL
    UPDATE table1
    SET column1 = "value"
  SQL
end
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ruby on rails db migrate 

rails db:migrate
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里亚尔db下来 

bin/rails db:migrate:down VERSION=YYYYMMDDHHMMSS

类似页面

带有示例的类似页面

在rails迁移中使用SQL
rails迁移使用外键创建表
rails db migrate
ruby on rails数据库迁移
rails db：migrate
rails创建新表迁移
迁移轨道
轨道创建表的迁移

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