jquery - Friendly_id gem 出现问题，尝试定位正确的 id 时出现问题

Question

因此，我正在为学校构建一个由不同 wiki 组成的网站，用户可以创建、更新、编辑等。在我的 wiki 编辑页面上，我允许高级用户选择向他们拥有的 wiki 添加或删除协作者如果他们选择将其 wiki 设为私有(private)，则创建。

我设计了此添加/删除协作者功能，以便与 AJAX 一起使用，以便用户可以与他们选择作为协作者添加或删除的另一个用户来回切换，而无需刷新页面。

在我实现Friendly_id gem 之前，我的添加/删除功能运行得很好。然而，在实现Friendly_id gem之后，我注意到创建了一个新的错误。让我解释一下..

每当我单击将用户添加为协作者时，一切似乎都已正常工作，并且我可以在添加和删除之间来回切换。但是，我最初尝试添加的用户并未添加为协作者，这在堆栈跟踪中很明显。

这是第一次单击“添加”链接后发生的情况:

Started POST "/wikis/hipsters/collaborators?user_id=3" for 127.0.0.1 at 2015-09-28 17:51:06 -0700
Processing by CollaboratorsController#create as JS
  Parameters: {"user_id"=>"3", "wiki_id"=>"hipsters"}
  Wiki Load (0.2ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."slug" = 'hipsters'  ORDER BY "wikis"."id" ASC LIMIT 1
   (0.1ms)  begin transaction
  SQL (0.4ms)  INSERT INTO "collaborators" ("created_at", "updated_at", "user_id", "wiki_id") VALUES (?, ?, ?, ?)  [["created_at", "2015-09-29 00:51:06.185794"], ["updated_at", "2015-09-29 00:51:06.185794"], ["user_id", 3], ["wiki_id", 0]]
   (85.8ms)  commit transaction
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
   (0.2ms)  SELECT COUNT(*) FROM "collaborators"  WHERE "collaborators"."wiki_id" = ?  [["wiki_id", 51]]
  Rendered collaborators/create.js.haml (3.0ms)
Completed 200 OK in 198ms (Views: 106.9ms | ActiveRecord: 86.8ms)

注意如何尝试使用 ["user_id", 3], ["wiki_id", 0] 建立新协作者

user_id 正确，但 wiki_id 不正确。为什么会发生这种情况？ Friendly_id gem 正在运行，您可以看到这个特定 wiki 的名称是“hipsters”。

这在这里很明显:

Parameters: {"user_id"=>"3", "wiki_id"=>"hipsters"}
  Wiki Load (0.2ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."slug" = 'hipsters'  ORDER BY "wikis"."id" ASC LIMIT 1

但是，由于我刚刚尝试“添加”用户作为协作者，现在链接已切换为“删除”，以删除协作者。

单击删除协作者后，我的服务器日志显示以下内容:

Started DELETE "/wikis/51/collaborators/54" for 127.0.0.1 at 2015-09-28 18:02:39 -0700
Processing by CollaboratorsController#destroy as JS
  Parameters: {"wiki_id"=>"51", "id"=>"54"}
  Wiki Load (0.3ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."slug" = '51'  ORDER BY "wikis"."id" ASC LIMIT 1
  Wiki Load (0.1ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."id" = ? LIMIT 1  [["id", 51]]
  Collaborator Load (0.1ms)  SELECT  "collaborators".* FROM "collaborators"  WHERE "collaborators"."id" = ? LIMIT 1  [["id", 54]]
   (0.1ms)  begin transaction
  SQL (0.4ms)  DELETE FROM "collaborators" WHERE "collaborators"."id" = ?  [["id", 54]]
   (30.1ms)  commit transaction
   (0.2ms)  SELECT COUNT(*) FROM "collaborators"  WHERE "collaborators"."wiki_id" = ?  [["wiki_id", 51]]
  Rendered collaborators/destroy.js.haml (2.0ms)
Completed 200 OK in 52ms (Views: 16.1ms | ActiveRecord: 31.3ms)

然后，当我再次切换以将用户添加为协作者时，这次他们实际上被添加了。

服务器日志:

Started POST "/wikis/51/collaborators?user_id=3" for 127.0.0.1 at 2015-09-28 18:05:59 -0700
Processing by CollaboratorsController#create as JS
  Parameters: {"user_id"=>"3", "wiki_id"=>"51"}
  Wiki Load (0.2ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."slug" = '51'  ORDER BY "wikis"."id" ASC LIMIT 1
  Wiki Load (0.1ms)  SELECT  "wikis".* FROM "wikis"  WHERE "wikis"."id" = ? LIMIT 1  [["id", 51]]
   (0.1ms)  begin transaction
  SQL (0.7ms)  INSERT INTO "collaborators" ("created_at", "updated_at", "user_id", "wiki_id") VALUES (?, ?, ?, ?)  [["created_at", "2015-09-29 01:05:59.564379"], ["updated_at", "2015-09-29 01:05:59.564379"], ["user_id", 3], ["wiki_id", 51]]
   (182.8ms)  commit transaction
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
   (0.2ms)  SELECT COUNT(*) FROM "collaborators"  WHERE "collaborators"."wiki_id" = ?  [["wiki_id", 51]]
  Rendered collaborators/create.js.haml (3.1ms)
Completed 200 OK in 198ms (Views: 8.3ms | ActiveRecord: 184.2ms)

我注意到这次参数读取Parameters: {"user_id"=>"3", "wiki_id"=>"51"} 而不是Parameters: {"user_id "=>"3", "wiki_id"=>"潮人"}

这是为什么呢？我怎样才能让这个功能正常工作？

以下是一些相关文件:

wikis_controller.rb:

class WikisController < ApplicationController
  def index
    @wikis = policy_scope(Wiki)
  end

  def show
    @wiki = Wiki.friendly.find(params[:id])
  end

  def new
    @wiki = Wiki.new

    authorize @wiki # Example
  end

  def create
    @wiki = Wiki.new(wiki_params)

    @wiki.user = current_user

    authorize @wiki

    if @wiki.save
      flash[:notice] = "Wiki was saved."
      redirect_to @wiki
    else
      flash[:error] = "There was an error saving the wiki.  Please try again."
      render :new
    end
  end

  def edit
    @wiki = Wiki.friendly.find(params[:id])
    @users = User.all

    authorize Wiki, :edit?
  end

  def update
    @wiki = Wiki.friendly.find(params[:id])

    authorize @wiki

    if @wiki.update_attributes(wiki_params)
      flash[:notice] = "Wiki was updated."
      redirect_to @wiki
    else
      flash[:error] = "There was an error saving the wiki.  Please try again."
      render :edit
    end
  end

  def destroy
    @wiki = Wiki.friendly.find(params[:id])

    authorize Wiki, :destroy?

    if @wiki.destroy
      flash[:notice] = "\"#{@wiki.title}\" was deleted successfully."
      redirect_to wikis_path
    else
      flash[:error] = "There was an error deleting the wiki."
      render :show
    end
  end

  private

  def wiki_params
    params.require(:wiki).permit(:title, :body, :private)
  end
end

collaborators_controller.rb:

class CollaboratorsController < ApplicationController
  def create
    @wiki = Wiki.friendly.find(params[:wiki_id])
    @collaborator = Collaborator.create(wiki_id: params[:wiki_id], user_id: params[:user_id])

    respond_to do |format|
      format.html
      format.js
    end
  end

  def destroy
    @wiki = Wiki.friendly.find(params[:wiki_id])
    @collab = Collaborator.find(params[:id])
    @user_id = @collab.user_id
    @collab.destroy

    respond_to do |format|
      format.html
      format.js
    end
  end
end

合作者/create.js.haml:

- if @collaborator.save
  $('#'+#{ params[:user_id] }).replaceWith('<a data-method="delete" data-remote="true" href="/wikis/'+#{ @wiki.id }+'/collaborators/'+#{ @collaborator.id }+'" id="#{ @collaborator.user_id }" rel="nofollow">Remove</a>');
  $('.js-collaborators-count').html("Currently #{ pluralize(@wiki.collaborators.count, 'collaborator') } on this wiki.");
- else
  $('#'+#{ params[:user_id] }).prepend("<div class='alert alert-danger'>#{ flash[:error] = 'Oops something went wrong..' }</div>");

合作者/destroy.js.haml:

- if @collab.destroyed?
  $('#'+#{ @user_id.to_s }).replaceWith('<a data-method="post" data-remote="true" href="/wikis/'+#{ @wiki.id }+'/collaborators?user_id=#{ @user_id }" id="#{ @user_id }" rel="nofollow">Add</a>');
  $('.js-collaborators-count').html("Currently #{ pluralize(@wiki.collaborators.count, 'collaborator') } on this wiki.");
- else
  $('#'+#{ @user_id.to_s }).prepend("<div class='alert alert-danger'>#{ flash[:error] = 'Oops something went wrong..' }</div>");

wikis/edit.html.haml:

%h1 Edit Wiki

.row
  .col-md-8
    = form_for @wiki do |f|
      .form-group
        = f.label :title
        = f.text_field :title, class: 'form-control', placeholder: "Enter wiki title"
      .form-group
        = f.label :body
        = f.text_area :body, rows: 8, class: 'form-control', placeholder: "Enter wiki body"

      - if current_user.role == 'admin' || (current_user.role == 'premium' && @wiki.user == current_user)
        = render 'wikis/form', f: f

      - if current_user.role == 'admin' || (@wiki.private == true && @wiki.user == current_user)
        .form-group
          %h5
            Add/Remove Collaborators to the
            %em “#{ @wiki.title }”
            wiki (Showing all users)
          %small
            .js-collaborators-count
              Currently #{ pluralize(@wiki.collaborators.count, 'collaborator') } on this wiki.
          .col-sm-4.text-center.outline
            %h6.underline Name
            - @users.each do |u|
              .border_bottom
                = u.name
                %br/

          .col-sm-4.text-center.outline
            %h6.underline Email
            - @users.each do |u|
              .border_bottom
                = u.email

          .col-sm-4.text-center.outline
            %h6.underline Give Access
            - @users.each do |u|
              .border_bottom
                - if collab = u.collaborators.find_by(wiki_id: @wiki.id)
                  = link_to "Remove", wiki_collaborator_path(@wiki, collab), method: :delete, remote: true, id: u.id
                - else
                  = link_to "Add", wiki_collaborators_path(@wiki, user_id: u.id), method: :post, remote: true, id: u.id

      .form-group
        = f.submit "Update", class: 'btn btn-success mt_10'

如果我遗漏了任何文件，您可以在 github 上查看我的存储库:

https://github.com/jlquaccia/blocipedia

Answer 1

找出问题所在。我必须更改创建操作中的 collaborators_controller 内部

@collaborator = Collaborator.create(wiki_id: params[:wiki_id], user_id: params[:user_id])

到

@collaborator = Collaborator.create(wiki_id: @wiki.id, user_id: params[:user_id])

params[:wiki_id] 原本应该以 @wiki.id 为目标，但却以Friendly_id slug为目标