FriendlyID 未找到具有匹配 slug 的条目

Question

FriendlyID 似乎没有找到具有相应 slug 的数据库条目。

这是控制台显示的内容：

Started GET "/budgets/drinks" for 127.0.0.1 at 2015-07-01 12:42:53 +0200 Processing by BudgetsController#show as HTML Parameters: {"id"=>"drinks"} Budget Load (0.2ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."slug" = 'drinks' ORDER BY "budgets"."id" ASC LIMIT 1 User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1 MoneyTransaction Load (0.5ms) SELECT "money_transactions".* FROM "money_transactions" WHERE "money_transactions"."budget_id" = ? [["budget_id", 17]]
Budget Load (0.1ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."user_id" = ? [["user_id", 1]] Rendered budgets/_budget_overview.html.erb (5.5ms) Rendered budgets/_form.html.erb (7.0ms) Rendered budgets/show.html.erb within layouts/application (26.3ms) Completed 200 OK in 224ms (Views: 213.5ms | ActiveRecord: 1.0ms)

Started POST "/money_transactions" for 127.0.0.1 at 2015-07-01 12:43:06 +0200 Processing by MoneyTransactionsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"EPcX4adigoTRY6A1doxWpdMM9eXy/KyqY84zKp855bE=", "money_transaction"=>{"budget_id"=>"drinks", "amount"=>"24", "title"=>"coke"}, "button"=>""} User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1 Budget Load (0.2ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."slug" = 'drinks' ORDER BY "budgets"."id" ASC LIMIT 1
(0.1ms) begin transaction Budget Load (0.1ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."id" = ? LIMIT 1 [["id", 0]]
(0.1ms) rollback transaction (0.0ms) begin transaction (0.1ms) rollback transaction Redirected to http://localhost:3000/budgets/drinks Completed 302 Found in 14ms (ActiveRecord: 0.7ms)

这表明 slug 存在并且与我访问页面时的 ID 正确关联。但是，在查找带有 slug "drinks" 的条目后，它只有 returns ID 为 0。

Budget Load (0.2ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."slug" = 'drinks' ORDER BY "budgets"."id" ASC LIMIT 1
(0.1ms) begin transaction Budget Load (0.1ms) SELECT "budgets".* FROM "budgets" WHERE "budgets"."id" = ? LIMIT 1 [["id", 0]]

money_transaction_controller.rb

def create
    @budget = Budget.friendly.find(params[:money_transaction][:budget_id])
    @money_transaction = MoneyTransaction.new(money_transaction_params)
    @money_transaction.user = current_user
    @money_transaction.date = Time.now.to_date
    @money_transaction.is_positive = 0

    @money_transaction.save

    respond_to do |format|
      if @money_transaction.save
        format.html { redirect_to @budget, notice: 'Transaction added.'}
        format.json { render :show, status: :created, location: @budget }
      else
        format.html { redirect_to @budget, alert: 'Transaction was not valid.'}
        format.json { render json: @money_transaction.errors, status: :unprocessable_entity }
      end
    end
  end

budget.rb

class Budget < ActiveRecord::Base
  belongs_to :user
  has_many :money_transactions

  validates :amount, presence: true
  validates :title, presence: true
  validates :user, presence: true
  validates :amount, numericality: true

  extend FriendlyId
  friendly_id :title, use: :slugged

  def should_generate_new_friendly_id?
    new_record?
  end
end

budgets/show.html.erb

<%= form_for(@budget.money_transactions.build, :html => { :id => 'money_transaction-form' }) do |f| %>
      <%= f.hidden_field :budget_id, :value => params[:id] %>

      <%= f.number_field :amount, id: "transaction-input", placeholder: "#{@budget.title} ", step: 0.01, :autocomplete => :off %>

      <%= f.text_field :title, class: "", placeholder: "purpose", :autocomplete => :off %>

      <%= f.button(type: 'submit', class: "postfix") do %>
          <i class="fa fa-arrow-right"></i>
      <% end %>

<% end %>

routes.rb

  get '/pages', to: 'pages#index'

  devise_for :users
  resources :users

  resources :budget
  resources :money_transactions


  root :to => 'budgets#index'

如果您需要任何其他文件，请告诉我。我以前和 friendlyID 一起工作过，从来没有遇到过问题。我希望你能帮助我。

编辑： 所以我找到了解决方法。但我觉得应该有一个更简单的解决方案。我将隐藏字段更改为：

<%= f.hidden_field :budget_id, :value => Budget.where(:slug => params[:id]).last.id %>

现在可以了。但是，如果您有更好的解决方案，请告诉我。

Answer 1

不要将 FriendlyID 用于表单参数 - 只需使用直接 ID。这让 rails 自动添加关联并产生更有效的 SQL 查询。

<%= form_for(@budget.money_transactions.build, :html => { :id => 'money_transaction-form' }) do |f| %>
  <%= f.hidden_field :budget_id, value: @budget.id %>
  <%= f.number_field :amount, id: "transaction-input", placeholder: "#{@budget.title} ", step: 0.01, :autocomplete => :off %>
  <%= f.text_field :title, class: "", placeholder: "purpose", :autocomplete => :off %>
  <%= f.button(type: 'submit', class: "postfix") do %>
    <i class="fa fa-arrow-right"></i>
  <% end %>
<% end %>

这样你就可以清理你的控制器了：

def create
  @money_transaction = MoneyTransaction.new(money_transaction_params) do |mt|
    mt.user = current_user
    mt.date = Time.now.to_date
    mt.is_positive = 0
  end
  respond_to do |format|
    if @money_transaction.save
      format.html { redirect_to @budget, notice: 'Transaction added.'}
      format.json { render :show, status: :created, location: @budget }
    else
      format.html { redirect_to @budget, alert: 'Transaction was not valid.'}
      format.json { render json: @money_transaction.errors, status: :unprocessable_entity }
    end
  end
end

FriendlyID 未找到具有匹配 slug 的条目

FriendlyID does not find entry with matching slug

ruby-on-rails

ruby

ruby-on-rails-4

friendly-id