Question

我想运行这个测试，但它给了我一个错误，我不明白为什么从几小时开始。

以下是完整错误：

 FAIL["test_should_update_preference", Minitest::Result, 2.7792289879871532]
 test_should_update_preference#Minitest::Result (2.78s)
        Expected response to be a <3XX: redirect>, but was a <204: No Content>
        Response body: 
        test/controllers/preferences_controller_test.rb:20:in `block in <class:PreferencesControllerTest>'

感谢所有关注我问题的人！

这是测试：测试“应该更新首选项” patch preference_url（@preference），params：{preference：{accepted：@preference.accepted，institute_id：@preference.institute_id，preference_value：@preference.preference_value，user_id：@preference.user_id，wei_preference_value：@preference.wei_preference_value}} assert_redirected_to preferences_path 端

这是控制器：

 class PreferencesController < ApplicationController
  before_action :set_preference, only: [:show, :edit, :update, :destroy]

  # GET /preferences
  # GET /preferences.json
  def index
    @preferences = Preference.all
  end

  # GET /preferences/1
  # GET /preferences/1.json
  def show
  end

  # GET /preferences/new
  def new
    @preference = Preference.new
  end

  # GET /preferences/1/edit
  def edit
  end

  # POST /preferences
  # POST /preferences.json
  def create
    @preference = Preference.new(preference_params)

    respond_to do |format|
      if @preference.save
        format.html { redirect_to preferences_path}
      else
        format.html { render :index }
        format.json { render json: @preference.errors, status: :unprocessable_entity }
      end
    end
  end

  def create_all
    @institutes = Institute.all
    @institutes.each do |li|
        @preference = Preference.create(institute_id: li.id, user_id: current_user.id, preference_value: 5)
    end
    lash[:success] = "Sie können die Präferenzen jetzt bearbeiten."
    render :index
  end

  # PATCH/PUT /preferences/1
  # PATCH/PUT /preferences/1.json
  def update
    if @preference.update_attributes(preference_params)
      flash[:success] = "Die Präferenz wurde aktualisiert."
      redirect_to preferences_path
    end
  end

  # DELETE /preferences/1
  # DELETE /preferences/1.json
  def destroy
    @preference.destroy
    respond_to do |format|
      format.html { redirect_to preferences_url }
    end
  end

当我在brwoser中执行更新任务时，这是我得到的日志文件：

Started PATCH "/preferences/43" for 127.0.0.1 at 2018-03-02 15:36:06 +0100
Processing by PreferencesController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"CXcMiSLQdlUeJf75g/uClWaI89f/nxypzb60yphXh26sJx5E0bUu39SAEckE13GeozuCN9WQ3eBUTbPz1/WqoQ==", "preference"=>{"user_id"=>"2", "institute_id"=>"1", "preference_value"=>"1"}, "commit"=>"Speichern", "id"=>"43"}
  [1m[36mPreference Load (0.3ms)[0m  [1m[34mSELECT  "preferences".* FROM "preferences" WHERE "preferences"."id" = ? LIMIT ?[0m  [["id", 43], ["LIMIT", 1]]
  [1m[35m (0.2ms)[0m  [1m[36mbegin transaction[0m
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 1], ["LIMIT", 1]]
  [1m[36mUser Load (0.1ms)[0m  [1m[34mSELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT ?[0m  [["id", 2], ["LIMIT", 1]]
  [1m[35mSQL (31.4ms)[0m  [1m[33mUPDATE "preferences" SET "preference_value" = ?, "updated_at" = ? WHERE "preferences"."id" = ?[0m  [["preference_value", 1], ["updated_at", "2018-03-02 14:36:06.852000"], ["id", 43]]
  [1m[35m (23.5ms)[0m  [1m[36mcommit transaction[0m
Redirected to http://localhost:3000/preferences
Completed 302 Found in 76ms (ActiveRecord: 55.6ms)


Started GET "/preferences" for 127.0.0.1 at 2018-03-02 15:36:06 +0100
Processing by PreferencesController#index as HTML
  Rendering preferences/index.html.erb within layouts/application
  [1m[36mUser Load (0.1ms)[0m  [1m[34mSELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT ?[0m  [["id", 2], ["LIMIT", 1]]
  [1m[36mPreference Exists (0.2ms)[0m  [1m[34mSELECT  1 AS one FROM "preferences" WHERE "preferences"."user_id" = ? LIMIT ?[0m  [["user_id", 2], ["LIMIT", 1]]
  [1m[36mPreference Load (0.4ms)[0m  [1m[34mSELECT "preferences".* FROM "preferences" WHERE "preferences"."user_id" = ?[0m  [["user_id", 2]]
  [1m[36mInstitute Load (0.3ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 1], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 2], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 3], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 4], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 5], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 6], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 7], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.4ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 8], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 9], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 10], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.5ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 11], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 12], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 13], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 14], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.3ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 15], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 16], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 17], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.2ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 18], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.2ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 19], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.4ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 20], ["LIMIT", 1]]
  [1m[36mInstitute Load (0.1ms)[0m  [1m[34mSELECT  "institutes".* FROM "institutes" WHERE "institutes"."id" = ? LIMIT ?[0m  [["id", 21], ["LIMIT", 1]]
  Rendered preferences/index.html.erb within layouts/application (74.8ms)
  Rendered layouts/_rails_default.html.erb (191.3ms)
  Rendered layouts/_shim.html.erb (3.5ms)
  Rendered layouts/_header.html.erb (19.9ms)
  Rendered layouts/_footer.html.erb (1.4ms)
Completed 200 OK in 326ms (Views: 317.8ms | ActiveRecord: 4.4ms)

Answer 1

如果您的update方法调用失败，则在update_attributes方法中，它无法呈现任何内容，这就是您收到No Content错误的原因。

首先，您应该为该方法添加一个else语句，以便它不会返回没有内容。渲染某种错误状态就行了。然后你应该放一个调试器，看看它失败的原因。您可以在实例上使用.errors方法来查看它无效的原因。

Answer 2

感谢您的建议！我更新了控制器并将else语句放入控制器。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" >
    <Columns>
    <asp:TemplateField HeaderText="料號">
    <ItemTemplate>
    <asp:Label ID="Part_No" runat="server" Text='<%# Eval("Part_No")%>' ></asp:Label>
    </ItemTemplate>
    <HeaderStyle CssClass="bhead" />
    <ItemStyle CssClass="bbody" />
    </asp:TemplateField>

    <asp:TemplateField HeaderText="End user" >
    <ItemTemplate>
    <asp:Label ID="Dircu" runat="server" Text='<%# Eval("Dircu")%>' ></asp:Label>
    </ItemTemplate>
    <HeaderStyle CssClass="bhead" />
    <ItemStyle CssClass="bbody" />
    </asp:TemplateField>

    <asp:TemplateField HeaderText="Assembly" >
    <ItemTemplate>
    <asp:Label ID="Assfct" runat="server" Text='<%# Eval("Assfct")%>' ></asp:Label>
    </ItemTemplate>
    <HeaderStyle CssClass="bhead" />
    <ItemStyle CssClass="bbody" />
    </asp:TemplateField>



    </Columns>

</asp:GridView>

现在，如果我将preferences_path放入else操作中，测试将会成功。这不是我测试的目标，所以我在else语句中放入了institute_path而不是preference_path。现在我失败了：

def update
    if @preference.update_attributes(preference_params)
      flash[:success] = "Die Präferenz wurde aktualisiert."
      redirect_to preferences_path
    else
      flash[:error] = "Die Präferenz konnte nicht aktualisiert werden."
      redirect_to preference_path
    end
  end

我将谷歌.error方法并应用它来报告错误是什么。

更新测试失败：“预期响应为＆lt; 3XX：重定向＆gt;，但是＆lt; 204：No Content＆gt;”

2 个答案: