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问题描述

我可以做 Post.delete_all 全部删除我的帖子,但如果我要删除所有帖子,评论,博客等即,我怎么遍历在我所有的模型和运行 DELETE_ALL 的方法?

解决方案

 耙分贝:重设
 

据重现从迁移你的表。

由于建议的意见,更快的方式做到这一点(但你要添加一个新的rake任务)是:

 命名空间:DB做
  DESC截断所有表
  任务:截断=> :环境做
    康恩=的ActiveRecord :: Base.connection来
    表= conn.execute(节目表)地图{|:R | R [O]}
    tables.deleteschema_migrations
    tables.each {| T | conn.execute(TRUNCATE#【T】)}
  结束
结束
 

响应复制的:回答SO

I can do Post.delete_all to delete all my posts, but what if I want to delete all posts, comments, blogs, etc. I.e., how do I iterate over all my models and run the delete_all method?

解决方案
rake db:reset 

It recreates your table from migrations.

As suggested in the comments, a faster way to do it (but you have to add a new rake task) is:

namespace :db do
  desc "Truncate all tables"
  task :truncate => :environment do
    conn = ActiveRecord::Base.connection
    tables = conn.execute("show tables").map { |r| r[0] }
    tables.delete "schema_migrations"
    tables.each { |t| conn.execute("TRUNCATE #{t}") }
  end
end

Response copied from: answer on SO.

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10-29 21:39