未定义的方法`migration_error的ActiveRecord的::基地='：类 [英] undefined method `migration_error=' for ActiveRecord::Base:Class
本文介绍了未定义的方法`migration_error的ActiveRecord的::基地='：类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我运行包的exec耙分贝：迁移--trace我收到以下错误
When I run bundle exec rake db:migrate --trace I get the following error.
C:\Sites\rails_projects\sample_app>bundle exec rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `migration_error=' for ActiveRecord::Base:Class
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-3.2.14/lib/act
ive_record/dynamic_matchers.rb:55:in `method_missing'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-3.2.14/lib/act
ive_record/railtie.rb:72:in `block (3 levels) in <class:Railtie>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-3.2.14/lib/act
ive_record/railtie.rb:71:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-3.2.14/lib/act
ive_record/railtie.rb:71:in `block (2 levels) in <class:Railtie>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/lazy_load_hooks.rb:36:in `instance_eval'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/lazy_load_hooks.rb:36:in `execute_hook'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/lazy_load_hooks.rb:26:in `block in on_load'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/lazy_load_hooks.rb:25:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/lazy_load_hooks.rb:25:in `on_load'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activerecord-3.2.14/lib/act
ive_record/railtie.rb:67:in `block in <class:Railtie>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/i
nitializable.rb:30:in `instance_exec'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/i
nitializable.rb:30:in `run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/i
nitializable.rb:55:in `block in run_initializers'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/i
nitializable.rb:54:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/i
nitializable.rb:54:in `run_initializers'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/a
pplication.rb:136:in `initialize!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/r
ailtie/configurable.rb:30:in `method_missing'
C:/Sites/rails_projects/sample_app/config/environment.rb:5:in `<top (required)>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/dependencies.rb:251:in `require'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/dependencies.rb:251:in `block in require'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/dependencies.rb:236:in `load_dependency'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.14/lib/ac
tive_support/dependencies.rb:251:in `require'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/a
pplication.rb:103:in `require_environment!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-3.2.14/lib/rails/a
pplication.rb:305:in `block (2 levels) in initialize_tasks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:236:in `call'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:236:in `block in execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:231:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:231:in `execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:175:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:168:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:197:in `block in invoke_prerequisites'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:195:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:195:in `invoke_prerequisites'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:174:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:168:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.r
b:161:in `invoke'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:149:in `invoke_task'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:106:in `block (2 levels) in top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:106:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:106:in `block in top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:115:in `run_with_threads'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:100:in `top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:78:in `block in run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:165:in `standard_exception_handling'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/applic
ation.rb:75:in `run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/bin/rake:33:in
`<top (required)>'
C:/RailsInstaller/Ruby1.9.3/bin/rake:23:in `load'
C:/RailsInstaller/Ruby1.9.3/bin/rake:23:in `<main>'
Tasks: TOP => db:migrate => environment
的Gemfile
Gemfile
source 'https://rubygems.org'
gem 'rails', '3.2.14'
gem 'bootstrap-sass', '2.1'
gem 'bcrypt-ruby', '3.0.1'
gem 'faker', '1.0.1'
gem 'will_paginate', '3.0.3'
gem 'bootstrap-will_paginate', '0.0.6'
gem 'jquery-rails', '2.0.2'
group :development, :test do
gem 'sqlite3', '1.3.5'
gem 'rspec-rails', '2.11.0'
gem 'guard-rspec', '1.2.1'
gem 'guard-spork', '1.2.0'
gem 'childprocess', '0.3.6'
gem 'spork', '0.9.2'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '3.2.5'
gem 'coffee-rails', '3.2.2'
gem 'uglifier', '1.2.3'
end
group :test do
gem 'capybara', '1.1.2'
gem 'factory_girl_rails', '4.1.0'
gem 'cucumber-rails', '1.2.1', :require => false
gem 'database_cleaner', '0.7.0'
# gem 'launchy', '2.1.0'
# gem 'rb-fsevent', '0.9.1', :require => false
# gem 'growl', '1.0.3'
end
group :production do
gem 'pg', '0.12.2'
end
的database.yml
database.yml
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test: &test
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
cucumber:
<<: *test
我检查了类似的帖子，没有这些解决方案都为我工作这么感谢您的帮助，您可以提供。
I've checked similar posts and none of those solutions have worked for me so thanks for any help you can offer.
推荐答案
我碰到这个错误在设计多引擎的应用程序多次，它总是发生在引擎。但是，它似乎，在我的情况下，来自一个不小心的错误。对于我的引擎，我没有在的database.yml 指定的任何数据库环境中，比测试数据库等：
I've run into this error multiple times in designing a multi-engine app, and it always happens in the engines. However, it seems to, in my case, come from a careless error. For my engines, I don't have any database environments specified in database.yml, other than the test database:
test:
adapter: "mysql2"
database: "test_engine_db"
username: 'root'
password: ''
于是做了耙分贝：迁移让我这个无助的错误：
So doing a rake db:migrate gets me this unhelpful error:
undefined method `migration_error=' for ActiveRecord::Base:Class
/Users/me/.rvm/gems/ruby-1.9.3-head@mygems/gems/activerecord-3.2.14/lib/active_record/dynamic_matchers.rb:55:in `method_missing'
是什么问题是，我需要指定测试环境：
rake db:migrate RAILS_ENV=test
这是一个没有废话......但错误信息是深刻无益。我什么都试过，包括删除我的宝石和手工指定只有一个版本的Rails，并没有采取任何行动。所有的问题是我缺乏RAILS_ENV标志。
Which is a "no duh"...but the error message is profoundly unhelpful. I tried everything, including erasing my gemset and manually specifying just one version of Rails, and that did nothing. All the problem was was in my lack of RAILS_ENV flag.
这篇关于未定义的方法`migration_error的ActiveRecord的::基地='：类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！
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