rake db:migrate - Mysql2::Error: Table 'database_development.locations' 不存在：SHOW FULL FIELDS FROM `locations`

Question

Rails 3.2.2

红宝石 2.0.0

ubuntu 16.04

mysql服务器：

版本：5.7.12-0ubuntu1.1

版本：5.7.12-0ubuntu1

版本：5.7.11-0ubuntu6

我运行迁移，显示错误：（见下面的日志）

当我进入 mysql 控制台并选择所有数据库时，当前列表中有我的数据库。

我尝试从另一台电脑运行迁移，ubuntu 14.04，mysql 服务器：5.5.49，一切运行没有错误。

如何解决这个问题？感谢您的提前

database.yml

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: projectname_development
  username: root
  password: "123" 
  socket: /var/run/mysqld/mysqld.sock


test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: projectname_test
  pool: 5
  username: root
  password: 123 
  socket: /var/run/mysqld/mysqld.sock

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: projectname_production
  pool: 5
  username: root
  password: 123
  socket: /var/run/mysqld/mysqld.sock


Warning: Error loading /home/user/projects/projectname/app/models/country.rb:
Mysql2::Error: Table 'projectname_development.locations' doesn't exist: SHOW FULL FIELDS FROM `locations`
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rack-mini-profiler-0.9.7/lib/patches/db/mysql2.rb:20:in `query'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rack-mini-profiler-0.9.7/lib/patches/db/mysql2.rb:20:in `query'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:245:in `block in execute'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:245:in `execute'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/mysql2_adapter.rb:213:in `execute'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:259:in `execute_and_free'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:426:in `columns'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/connection_adapters/schema_cache.rb:12:in `block in initialize'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/model_schema.rb:229:in `yield'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/model_schema.rb:229:in `columns'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/model_schema.rb:238:in `columns_hash'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/inheritance.rb:19:in `descends_from_active_record?'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/inheritance.rb:25:in `finder_needs_type_condition?'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/base.rb:455:in `relation'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/scoping/named.rb:37:in `scoped'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activerecord-3.2.22/lib/active_record/querying.rb:9:in `order'
/home/user/projects/projectname/app/models/country.rb:16:in `<class:Country>'
/home/user/projects/projectname/app/models/country.rb:15:in `<top (required)>'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:469:in `load'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:469:in `block in load_file'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:639:in `new_constants_in'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:468:in `load_file'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:353:in `require_or_load'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:502:in `load_missing_constant'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:192:in `block in const_missing'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:190:in `each'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:190:in `const_missing'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rspec-core-2.5.2/lib/rspec/core/backward_compatibility.rb:20:in `const_missing'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/inflector/methods.rb:230:in `block in constantize'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/inflector/methods.rb:229:in `each'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/inflector/methods.rb:229:in `constantize'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/core_ext/string/inflections.rb:54:in `constantize'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:64:in `block (2 levels) in load_models'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:54:in `each'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:54:in `block in load_models'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:53:in `each'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:53:in `load_models'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/context.rb:15:in `prepare'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx.rb:82:in `block in context'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx.rb:79:in `synchronize'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx.rb:79:in `context'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/thinking-sphinx-2.0.14/lib/thinking_sphinx/active_record.rb:166:in `define_index'
/home/user/projects/projectname/app/models/group.rb:96:in `<class:Group>'
/home/user/projects/projectname/app/models/group.rb:35:in `<top (required)>'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:469:in `load'
/home/user/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:469:in `block in load_file'
/home/user/.rbenv/versions/2.0.0-

Answer 1

我认为您已经编写了用于创建位置表并将列添加到位置的迁移。

如错误日志所述，在将列添加到位置表时，您的迁移失败。

第 1 步： 复制创建位置表迁移文件的时间戳（不添加列时间戳）。

第 2 步： 在 schema_migrations 表中搜索它并从中删除该记录。

比rake db:migrate