我想知道Rails中给定模型的表标题对应的字段名称.
query.columns.map{|q| q.caption}
=> [“Tracker”,“Status”,“Priority”,“Subject”,“Assignee”,“Target version”,“Due date”,“% Done”]@H_404_3@query.columns.map{|q| q.name}
=> [:tracker,:status,:priority,:subject,:assigned_to,:fixed_version,:due_date,:done_ratio]@H_404_3@我的模型看起来像@H_404_3@
Issue.columns.map{|q| q.name}
=> [“id”,“tracker_id”,“project_id”,“subject”,“description”,“due_date”,“category_id”,“status_id”,“assigned_to_id”,“priority_id”,“fixed_version_id”,“author_id”,“created_on”,“updated_on”,“start_date”,“done_ratio”,“estimated_hours”,“parent_id”]@H_404_3@我想要从上面的信息获取对应于标题的字段名称(db字段名称).@H_404_3@
模型中的样本关联@H_404_3@
belongs_to :assigned_to,:class_name => 'Principal',:foreign_key => 'assigned_to_id'所以对于以上关联,我想知道外键.@H_404_3@
为了assign_to我想要“assigned_to_id”@H_404_3@