无法耙 db:migrate [英] NOT able to rake db:migrate

问题描述

C:\Users\MEGHA>rails new sagar_blog
      create
      create  README.rdoc
      create  Rakefile
      ... <snip> ...
Using turbolinks (2.2.1)
Using uglifier (2.5.0)
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.

C:\Users\MEGHA>cd sagar_blog

C:\Users\MEGHA\sagar_blog>rails generate scaffold post title:string \ body:text
      invoke  active_record
      ... <snip> ...
      create      app/assets/stylesheets/posts.css.scss
      invoke  scss
      create    app/assets/stylesheets/scaffolds.css.scss

C:\Users\MEGHA\sagar_blog>rails generate scaffold comment post_id:integer  body:
text
      invoke  active_record
      create    db/migrate/20140402091132_create_comments.rb
      ... <snip> ...
      invoke  scss
   identical    app/assets/stylesheets/scaffolds.css.scss

C:\Users\MEGHA\sagar_blog>rake db:migrate
== 20140402091036 CreatePosts: migrating ======================================
-- create_table(:posts)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

undefined method `text' for :t:SymbolC:/Users/MEGHA/sagar_blog/db/migrate/201404
02091036_create_posts.rb:6:in `block in change'
C:/Users/MEGHA/sagar_blog/db/migrate/20140402091036_create_posts.rb:3:in `change
'
C:in `migrate'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

推荐答案

您致电:

\Users\MEGHA\sagar_blog>rails 生成脚手架 post title:string \ body:text

\Users\MEGHA\sagar_blog>rails generate scaffold post title:string \ body:text

去除多余的\:

\Users\MEGHA\sagar_blog>rails generate scaffold post title:string body:text

\ 实际上是一个硬空格，导致body 字段被称为body(名称前有一个空格)，这导致迁移文件生成一行 t.text : body 而不是 t.text :body，这会导致迁移失败(并且可能稍后也会失败其他内容).

\ is actually a hard blank, which causes the body field to be called body (with a blank before the name), this causes the migration file to generate a line t.text : body instead of t.text :body, which fails the migration (and probably later will fail other stuff as well).

这篇关于无法耙 db:migrate的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！