Question

如果这篇文章的标题不清楚，我提前道歉，我很难解释我遇到的问题。我有一个允许用户创建目标的应用程序。我正在尝试创建一个Collaboration模型，以便用户可以彼此分享他们的目标。为此，我创建了一个属于用户和目标模型的协作模型，并存储了goal_id和user_id，以表示用户对其他目标的访问权限。

我在Goal＃show中创建了一个表单，允许用户输入他们想要与之共享的用户的电子邮件地址。我将使用该电子邮件，从相关记录中获取user_id并创建Collaboration记录条目。我无法从获取用户电子邮件到获取ID并将其作为Param传递。代码发布在下面。

CollaborationsController.rb

class CollaborationsController < ApplicationController
    def create
        @goal = Goal.find(params[:goal_id])
        @user = User.find_by(email: params[:email])
        #@user=User.find(params[:email])
      if @user
            @collaboration = @goal.collaborations.create(collaboration_params)
            if @collaboration.save
                flash[:notice] = "User successfully added to goal."
            else
                flash[:error] = "There was a problem adding user. Please try again."
            end
        else
            flash[:error] = "Sorry that wasn't a valid username. Please try again."
        end
        redirect_to goal_path(@goal)
    end

    def collaboration_params
      params.require(:collaboration).permit(:user_id, :goal_id)
  end

end

协作/ _form.html.erb

<%= form_with(model: [ @goal, @goal.collaborations.build ], local: true) do |form| %>
  <p>
  <%= form.label :email %>
  <%= form.text_field :email %>
  </p>
  <p>
  <%= form.submit %>
  <p>
<% end %>

开发者工具中的表单数据：

utf8: ✓
authenticity_token: RXa9u10cLdw1FK29hOly33wWDN+dDd5NTtvZ/yYbKfMJ6RhHw+nV8/OgiFbQ+raRcNzbbWItCct7lv+A3CmINw==
collaboration[email]: [actualemailofuser]
commit: Create Collaboration

提交并处理电子邮件地址。如何从找到包含该电子邮件的用户记录到从该记录获取user_id以将其作为参数提交？

Answer 1

出现此问题是因为我没有成功将：email参数传递给Controller方法创建。

以下是工作代码：

collaborations_controller.rb

class CollaborationsController < ApplicationController
    def create
        @goal = Goal.find(params[:goal_id])
        @user = User.find_by(email: params[:email])
      if @user
            @collaboration = Collaboration.new(goal_id: @goal.id, user_id: @user.id)
            if @collaboration.save
                flash[:notice] = "User successfully added to goal."
            else
                flash[:error] = "There was a problem adding user. Please try again."
            end
        else
            flash[:error] = "Sorry that wasn't a valid username. Please try again."
        end
        redirect_to goal_path(@goal)
    end

    def collaboration_params
      params.require(:collaboration).permit(:user_id, :goal_id, :email)
  end

end

合作/ _form.html.erb

<%= form_with(model: [ @goal, @goal.collaborations.build ], local: true) do |form| %>
<p>
  <%= text_field_tag :email, params[:email] %>
 </p>
  <p>
  <%= form.submit %>
  </p>
<% end %>

通过电子邮件找到用户后，无法将user_id作为Param传递

1 个答案: