我想知道Rails中给定模型的表标题对应的字段名称.
我正在使用查询模型显示标题.
query.columns.map {| Q | q.caption}
=> ["跟踪器","状态","优先级","主题","受让人","目标版本","截止日期","完成百分比"]
列具有与标题对应的名称
query.columns.map {| Q | q.name}
=> [:tracker,:status,:priority,:subject,:assigned_to,:fixed_version,:due_date,:done_ratio]
我的模型看起来像
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"]
我想从上面的信息中获取与标题对应的字段名称(db字段名称).
模型中的样本关联
belongs_to :assigned_to, :class_name => 'Principal', :foreign_key => 'assigned_to_id'
所以对于上面的关联,我想知道外键.
因为assigned_to我想要'assigned_to_id'