我搜索了stackoverflow并没有看到类似的问题.我正在尝试在现有的Slicks表中添加一列.应该很容易,但我把我的头发拉出来！ 我可能还没有将rails命令命名为迁移：rails生成迁移AddNametoSlicks
我可能还没有将rails命令命名为迁移：rails生成迁移AddNametoSlicks name：string
也：
1.)此命令生成此迁移20130605194117_add_nameto_slicks.rb
没有_,这看起来不对.我将迁移的名称更改为add_name_to_slicks.rb
2.)迁移命令未生成add_column.我在命令中缺少什么？
这是迁移文件：
class AddNametoSlicks < ActiveRecord::Migration
def change
add_column :slicks, :name, :string
end
end
来自终端的错误：
rake aborted! An error has occurred, this and all later migrations canceled: uninitialized constant AddNameToSlicks/usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_su pport/inflector/methods.rb:230:in `block in constantize' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/inflector/methods.rb:229:in `eac h' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/inflector/methods.rb:229:in `con stantize' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activesupport-3.2.12/lib/active_support/core_ext/string/inflections.rb:5 4:in `constantize' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:538:in `load_migratio n' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:533:in `migration' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:528:in `migrate' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:720:in `block (2 leve ls) in migrate' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `call' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `block in ddl_ transaction' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/datab ase_statements.rb:192:in `transaction' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/transactions.rb:208:in `transactio n' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:775:in `ddl_transacti on' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:719:in `block in migr ate' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:700:in `each' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:700:in `migrate' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:570:in `up' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/migration.rb:551:in `migrate' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:179:in `bl ock (2 levels) in <top (required)>' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:246:in `call' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:241:in `each' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_leve l' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `each' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling' /usr/local/rvm/gems/ruby-1.9.3-p194@gigbase/gems/rake-10.0.4/lib/rake/application.rb:70:in `run' Tasks: TOP => db:migrate正在请求AddNameToSlicks,但您有AddNametoSlicks.
改为 – 到