Question

我正在尝试在我的rails应用程序中，在Employee模型和NetworkDrive模型之间设置has_and_belongs_to_many关系。

在employee.rb中我指定了

has_and_belongs_to_many :network_drives</code>

并在network_drive.rb ...

has_and_belongs_to_many :employee</code>

然而，它似乎正在生成模型属性，如“：network_drife_ids”而不是“：network_drive_ids”，这给我的错误，如

uninitialized constant Employee::NetworkDrife

这是准确的，考虑到该模型被称为NetworkDrive，而不是NetworkDrife。

很抱歉，如果这是一个重复的问题，但我不知道如何搜索此问题。我在这里尝试了几个关于HABTM关系问题的解决方案，但无济于事。

更新：这是完整的错误，在尝试将其更改为has_many之后：通过关系。

NameError: uninitialized constant EmployeeItRequest::EmployeeItRequestDrife
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/inheritance.rb:111:in `compute_type'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/reflection.rb:172:in `klass'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/reflection.rb:216:in `association_primary_key'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/associations/has_many_association.rb:104:in `foreign_key_present?'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/associations/association.rb:165:in `find_target?'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/associations/collection_association.rb:332:in `load_target'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/associations/collection_proxy.rb:44:in `load_target'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/associations/collection_proxy.rb:87:in `method_missing'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands/console.rb:47:in `start'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands/console.rb:8:in `start'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

更新：NetworkDrive.tableize的结果

NoMethodError: undefined method `tableize' for #<Class:0x0000000229fef8>
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.7/lib/active_record/dynamic_matchers.rb:50:in `method_missing'
    from (irb):1
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands/console.rb:47:in `start'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands/console.rb:8:in `start'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.7/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

Answer 1

这不是HABTM的问题，而是rails的内置变形规则之一，它将drives转换为单数drife而不是drive。

在控制台中：

"drives".singularize  # => "drife"

您可以通过添加变形规则来覆盖默认格式：

<强>初始化/是inflections.rb

ActiveSupport::Inflector.inflections do |inflect|
  inflect.clear :inflection_drives
  inflect.irregular 'network_drive', 'network_drives'
end

Rails has_and_belongs_to_many

1 个答案: