Rails 迁移不会改变 schema.rb [英] Rails migration does not change schema.rb

问题描述

我有一个未应用于我的 schema.rb 的 rails 迁移.迁移应该创建一个表:

I have a rails migration that is not being applied to my schema.rb. The migration should create a table:

class CreateUserGraphs < ActiveRecord::Migration
  def change
    create_table :user_graphs do |t|
      t.string :name
      t.string :content
      t.integer :user_id
      t.string :type_id
      t.integer :upload_id

      t.timestamps
    end

    add_index :user_graphs, [:user_id, :created_at]
  end
end

我做了 db:reset.然后我尝试 rake db:migrate:up VERSION=123123123(这是迁移#).我在我的开发"环境中.

I did db:reset. Then I tried rake db:migrate:up VERSION=123123123(this is the migration #). I am in my "dev" environment.

为什么迁移不会影响 schema.rb?

Why is the migration not affecting schema.rb?

推荐答案

来自文档:

rake db:reset 任务将删除数据库，重新创建它并将当前模式加载到其中.

The rake db:reset task will drop the database, recreate it and load the current schema into it.

这与运行所有迁移不同.它只会使用当前 schema.rb 文件的内容.如果无法回滚迁移，'rake db:reset' 可能帮不了你.要了解有关转储架构的更多信息，请参阅'模式倾销和你.'

This is not the same as running all the migrations. It will only use the contents of the current schema.rb file. If a migration can't be rolled back, 'rake db:reset' may not help you. To find out more about dumping the schema see 'schema dumping and you.'

所以 rake db:reset => db:drop db:create db:schema:load db:seed

要运行所有迁移，请使用:rake db:drop db:create db:migrate

To run all the migrations, use : rake db:drop db:create db:migrate

或者db:migrate:reset=> rake db:drop db:create db:migrate

参考

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