Question

在尝试访问我的某个模型workouts#show的节目视图时，我收到的错误是：

undefined method `stringify_keys' for "/workouts/abs-0002":String

它在_template.html.erb中的一个链接上调用它，该链接在我的workouts#show页面中呈现（第一行调用错误）：

  <%= link_to "Do this one!", workout_path(workout) do %>
    <p class="cta">Pick me!</p>
  <% end %>

我的workouts控制器是：

class WorkoutsController < ApplicationController
  def index
    @workouts = Workout.all
  end

  def show
    @workout = Workout.friendly.find(params[:id])
    @exercise = Exercise.new
    @report = Report.new
  end

  def new
    @workout = Workout.new
    @workout.user_id = current_user
  end

  def create
    @workout = Workout.new(workout_params)
    @workout.user = current_user

    if @workout.save
      flash[:notice] = "Workout was saved successfully."
      redirect_to @workout
    else
      flash.now[:alert] = "Error creating workout. Please try again."
      render :new
    end
  end

  def edit
    @workout = Workout.friendly.find(params[:id])
    @workout.user_id = current_user
  end

  def update
    @workout = Workout.friendly.find(params[:id])

    @workout.name = params[:workout][:name]
    @workout.workout_type = params[:workout][:workout_type]
    @workout.teaser = params[:workout][:teaser]
    @workout.description = params[:workout][:description]
    @workout.video = params[:workout][:video]
    @workout.difficulty = params[:workout][:difficulty]
    @workout.trainer = params[:workout][:trainer]
    @workout.user_id = params[:workout][:user_id]

    if @workout.save
       flash[:notice] = "Workout was updated successfully."
      redirect_to @workout
    else
      flash.now[:alert] = "Error saving workout. Please try again."
      render :edit
    end
  end

  def destroy
    @workout = Workout.friendly.find(params[:id])

    if @workout.destroy
      flash[:notice] = "\"#{@workout.name}\" was deleted successfully."
      redirect_to action: :index
    else
      flash.now[:alert] = "There was an error deleting the workout."
      render :show
    end
  end

  private
  def workout_params
    params.require(:workout).permit(:name, :workout_type, :teaser, :description, :video, :difficulty, :trainer, :user_id)
  end
end

我的workout.rb模型是：

class Workout < ActiveRecord::Base
  extend FriendlyId
  friendly_id :name, use: :slugged

  belongs_to :user
  has_many :exercises
  has_many :reports
  validates :user, presence: true
end

任何人都可以帮我看看这里出了什么问题吗？

Answer 1

根据http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to，如果要为链接使用自定义名称，则需要删除第一个参数：

如果您的链接目标很难适应name参数，也可以使用块。 ERB例子：

<%= link_to(@profile) do %>
  <strong><%= @profile.name %></strong> -- <span>Check it out!</span>
<% end %>

# => 
<a href="/profiles/1">
  <strong>David</strong> -- <span>Check it out!</span>
</a>

未定义的方法`stringify_keys＆＃39;对于模特的展示页面

1 个答案: