ruby-on-rails - rails 3.2.6； rake 0.9.2.2；数据库 :migrate aborted

Question

我是 Rails 新手，正在按照他们网站上的入门指南进行操作。

当我在以下部分运行 $ rake db:migrate 时出现错误:http://guides.rubyonrails.org/getting_started.html#generating-a-model

它第一次在以下部分起作用:http://guides.rubyonrails.org/getting_started.html#running-a-migration

所以我不知道哪里出了问题。

当我运行 $ rake db:migrate

==  CreateComments: migrating =================================================
-- create_table(:comments)
rake aborted!
An error has occurred, this and all later migrations canceled:

private method `test' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f83a27503c8>

Tasks: TOP => db:migrate
(See full trace by running task with --trace)

所以我按照说明使用 --trace 参数运行它；我想知道是否有人知道这意味着什么，问题是什么？

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Invoke rails_env (first_time)
** Execute rails_env
** Execute db:load_config
** Execute db:migrate
==  CreateComments: migrating =================================================
-- create_table(:comments)
rake aborted!
An error has occurred, this and all later migrations canceled:

private method `test' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f8bacbba730>
/Users/parnmatt/Sites/test-rails/blog/db/migrate/20120627130542_create_comments.rb:5:in `block in change'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:160:in `create_table'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:466:in `block in method_missing'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:438:in `block in say_with_time'
/Users/parnmatt/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/benchmark.rb:280:in `measure'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:438:in `say_with_time'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:458:in `method_missing'
/Users/parnmatt/Sites/test-rails/blog/db/migrate/20120627130542_create_comments.rb:3:in `change'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:407:in `block (2 levels) in migrate'
/Users/parnmatt/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/benchmark.rb:280:in `measure'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:407:in `block in migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:123:in `with_connection'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:389:in `migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:528:in `migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:720:in `block (2 levels) in migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:775:in `call'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:775:in `block in ddl_transaction'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/transactions.rb:208:in `transaction'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:775:in `ddl_transaction'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:719:in `block in migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:700:in `each'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:700:in `migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:570:in `up'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/migration.rb:551:in `migrate'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/activerecord-3.2.6/lib/active_record/railties/databases.rake:153:in `block (2 levels) in <top (required)>'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/parnmatt/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/bin/rake:19:in `load'
/Users/parnmatt/.rvm/gems/ruby-1.9.3-p0/bin/rake:19:in `<main>'
Tasks: TOP => db:migrate

这是生成的迁移代码:

class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.string :commenter
      t.test :body
      t.references :post

      t.timestamps
    end
    add_index :comments, :post_id
  end
end

Answer 1

看起来当您运行生成器时，您说的是“测试”而不是“文本”作为正文。

应该是:$ rails generate model Comment commenter:string body:text post:references

Rake 不知道 t.test 是什么类型...应该是 t.text