强参数轨道4允许参数

Question

以下是我的参数，

{
:project_id => "1",
:ticket => {:name => "Ticket1"}
}

如何将project_id添加到允许的参数中？

控制器

params.require（：ticket）permit（：name）

Answer 1

以下是我所做的
我为项目参数添加了另一个功能

   def ticket_group_params
      params.require(:ticket_group).permit(:name)      
   end
   def project_params
      params.permit(:project_id)
   end

然后我只是合并结果，只为创建操作，例如

  # POST /ticket_group
  # POST /ticket_group.json
  def create
    @ticket_group = TicketGroup.new(ticket_group_params.merge(project_params))
    respond_to do |format|

Answer 2

def ticket_params
 name_params = params.require(:ticket).permit(:name)
 name_params.merge(params.permit(:project_id))
end
# => {name: 'val', project_id: 'val'}

或

def ticket_params
  params.require(:ticket).permit(:name).tap do |_params|
    _params[:project_id] = params.permit(:project_id)
  end
end
# => {name: 'val', project_id: 'val'}

或者，它可能是

def ticket_params
  params.permit(:project_id, ticket: [:name])
end
# => {project_id: 'val', ticket: {name: 'val'}}

Answer 3

您可能需要将其作为隐藏属性添加到表单中，如下所示：

<input type="hidden" name="ticket[project_id]" value="<%= @ticket.project_id %>" />

然后在控制器中你可以这样做：

params.require(:ticket).permit(:name,:project_id)

这里有一个有用的链接：https://github.com/rails/strong_parameters