mysql - Rails 调用同一个表中的不同字段

Question

我想调用同一个表中的不同字段，

分配者!=开放者

我无法调用分配了该主题的用户

mysql users table

mysql issues table

show.html.erb screenshot

<p>
  <strong>Assignedby:</strong>
  <%= @issue.user.try(:fullname) %>

</p>

<p>
  <strong>Openedby:</strong>
 <%= @issue.user.try(:fullname) %>

</p>

<小时/>

class Issue < ApplicationRecord

  belongs_to :project, foreign_key: :project_id, optional: true

  belongs_to :user, foreign_key: :assignedby_id, optional: true

  belongs_to :user, foreign_key: :openedby_id, optional: true

  belongs_to :user, foreign_key: :closedby_id, optional: true

end

Answer 1

您不能为所有这些 belongs_to 关联指定相同的名称，它们需要不同，例如:

class Issue < ApplicationRecord
  with_option optional: true do
    belongs_to :project
    belongs_to :assigner, class_name: 'User', foreign_key: :assignedby_id
    belongs_to :creator,  class_name: 'User', foreign_key: :openedby_id
    belongs_to :closer,   class_name: 'User', foreign_key: :closedby_id
  end
end