Question

我正在尝试构建一个简单的Rails应用程序，用户可以在其中添加许多图像。我在桌子上设置了多对多的ImageIdeas和图像可以有很多想法，想法可以有很多图像。

很难理解这个错误

资产管道中不存在资产“”。

这是我的想法控制器

  class IdeasController < ApplicationController
  before_action :logged_in?
  before_action :idea_current_user, only: [:show, :edit, :update, :destroy]

  def new
    @idea = Idea.new
    @user = User.find(params[:user_id])
    @categories = Category.all
  end

  def create
    @user = User.find(params[:user_id])
    @idea = @user.ideas.new(idea_params)
    @images = Image.all
    if @idea.save
      redirect_to user_idea_path(@user, @idea)
    else
      render :new
    end
  end

  def index
    @ideas = Idea.all
  end

  def show
    @idea = Idea.find(params[:id])
    @user = @idea.user
  end

  def edit
    @idea = Idea.find(params[:id])
    @user = @idea.user
    @categories = Category.all
  end

  def update
     @idea = Idea.find(params[:id])
     @user = @idea.user
     if @idea.update(idea_params)
       flash[:notice] = "Success"
       redirect_to user_idea_path(@user, @idea)
     else
       flash[:notice] = "Try again"
       render :edit
     end
  end

  def destroy
    @idea = Idea.find(params[:id])
    @user = @idea.user
    @idea.destroy
    redirect_to user_ideas_path(@user)
  end

  private

  def idea_params
    params.require(:idea).permit(:user_id, :name, :category_id)
  end

  def idea_current_user
    @user = current_user
  end
end

这是app / views / ideas / new.html.erb

<%= link_to "Home", root_path %>
<%= link_to "My Profile", user_path(@user) %>
<%= link_to "My Ideas", user_ideas_path %>
<div class = 'new-idea-form'>
  <%= form_for [@user, @idea] do |f| %>
    <%= f.label :name %>
    <%= f.text_field :name %>

    <%= select(:idea, :category_id, options_for_select(@categories.collect do |c|
                                                        [c.name, c.id] end)) %>

    <% @images.each do |image| %>

    <div class="image_<%= image.id %>">

      <%= check_box_tag image.title %>
      <%= image_tag image.image.to_s%>
    </div>
    <% end %>

    <%= f.submit%>
  <% end %>
</div>

<div class="image-selection">

</div>

和节目

<%= link_to "Home", root_path %>
<% @user.ideas.each do |idea| %>

<%= idea.name %><br>

<%= image_tag idea.images %>
<%= link_to "Edit Idea", edit_user_idea_path(@user)%><br>
<%= link_to "Delete Idea", user_idea_path(@user), method: :delete %>
<% end %>

亏本，截止日期是早上。希望夜猫子能抓住这个，但如果不是，就会喜欢看它是如何解决的。感谢。

在carrierwave中显示多少个图像

0 个答案: