Question

尝试提交包含文件的表单时出现错误“分配必须存在”。

我将分配参数传递给表单，检查强参数，仍然要求assignment_id。我尝试在分配标记模型上使用:optional，但是它将assignment_id列留空，这不是我想要的。

使用检查之后，我发现它没有将assignment_id和file传递给create动作。

AssignmentMark模型

class AssignmentMark < ApplicationRecord
    mount_uploaders :file, AssignmentMarkUploader
    serialize :file, JSON 

    belongs_to :assignment
    belongs_to :user
end

我有一个链接，该链接传递了assignment_id值

#assignments/show.html.erb 
<%= link_to 'Add new submission', new_assignment_mark_path(assignment: @assignment), class: "btn btn-primary" if @user_assignment.blank? %>

在我的assignment_mark_controller.erb中，我有新建和创建方法

    def new
        @assignment = Assignment.find(params[:assignment])
        @assignment_mark = AssignmentMark.new(assignment_id: params[:assignment])
      end

def create
    @assignment_mark = AssignmentMark.new(assignment_mark_params)
    @assignment_mark.user_id = current_user.id if current_user

    respond_to do |format|
      if @assignment_mark.save
        format.html { redirect_to assignment_path(@assignment_mark), notice: 'Assignment mark was successfully created.' }
        format.json { render :show, status: :created, location: @assignment_mark }
      else
        format.html { render :new }
        format.json { render json: @assignment_mark.errors, status: :unprocessable_entity }
      end
    end
  end

      private
        # Use callbacks to share common setup or constraints between actions.
        def set_assignment_mark
          @assignment_mark = AssignmentMark.find(params[:id])
        end

        # Never trust parameters from the scary internet, only allow the white list through.
        def assignment_mark_params
          params.require(:assignment_mark).permit(:marks, :user_id, {file: []}, :assignment_id)
        end
    end

在我的assign_mark表单视图中（使用脚手架生成的表单）

<div class="form-group ">
    <%= form.label :file %>
    <%= form.file_field :file, autofocus: true, required: true, multiple: true, class: "form-control" %>
  </div>

Rails形式没有传递价值

0 个答案: