Rails -我的“创建/新”方法不起作用

Question

我已经创建了一个表单，以便用户可以添加一个新的图片到网站目录，但出于某些原因，它不能工作。表单填好后，我点击“Submit”按钮，但是什么也不会发生，我只是停留在同一个页面上(我没有任何错误消息.)。我不认为这个错误来自我的Controller，因为当我在Controller的'create‘方法中添加raise关键字时，什么都不会发生。

我肯定这是个业余错误..。但我看不出来是什么。谢谢你的帮忙!

picture.rb /图片模型：

class Picture < ApplicationRecord
  validates :name, presence: true
  has_many_attached :photo
end

new.html.erb /这是我的表格：

<%= form_for(@picture) do |f| %>
  <div class="form-group">
    <%= f.label :name, "Please indicate the name" %>
    <%= f.text_field :name, class:"form-control", placeholder:"(mandatory field)" %>
  </div>
  <div class="form-group">
    <%= f.label :description, "Add a description" %>
    <%= f.text_area :description, class:"form-control" %>
  </div>
  <div class="form-group">
    <div class="row">
      <div class="col">
        <%= f.label :category, "Add a category" %>
        <%= f.text_field :category, class:"form-control" %>
      </div>
      <div class="col">
        <%= f.label :price, "Indicate the price (when applicable)" %>
        <%= f.number_field :price, class:"form-control", placeholder:"0,00$ CAD" %>
      </div>
    </div>
  </div>
  <div class="form-group">
    <div class="row">
      <div class="col">
        <p>Where do you want to add this item?</p>
          <div>
            <%= f.check_box :is_home_item %>
            <%= f.label :is_home_item, "Homepage" %>
          </div>
          <div>
            <%= f.check_box :is_portfolio_item %>
            <%= f.label :is_portfolio_item, "Work" %>
          </div>
          <div>
            <%= f.check_box :is_sketchbook_item %>
            <%= f.label :is_sketchbook_item, "Sketchbook" %>
          </div>
        <div>
          <%= f.check_box :is_shopping_item %>
          <%= f.label :is_shopping_item, "Shopping" %>
        </div>
      </div>
      <div class="col">
        <div class="form-group">
          <%= f.label :photo, "Select your picture" %>
          <%= f.file_field :photo, class:"form-control-file" %>
        </div>
      </div>
    </div>
  </div>
  <div class="form-group">
    <%= f.submit class:"btn btn-lg btn-primary" %>
  </div>
<% end %>

pictures_controller.rb /

class PicturesController < ApplicationController
  def new
    @picture = Picture.new
  end

  def create
    @picture = Picture.new(picture_params)
    if @picture.save
      redirect_to root_path(@picture), notice: "Picture was successfully created"
    else
      render :new
    end
  end

  private

  def picture_params
    params.require(:picture).permit(:name, :description, :category, :price, :is_home_item, :is_portfolio_item, :is_sketchbook_item, :is_shopping_item, :photo)
  end
end

这是我在本地服务器控制台上看到的文本

下面是我表单的HTML输出：

<form>
<input type="hidden" name="authenticity_token" value="7MxWbzbltjXcAx2dvgRwIu07WMpyjPQji6LI6ELifMZODLJyMBucNApnPRk8vsjshSEjyMMenDUfvDw6pN+/4Q==">
  <div class="form-group">
    <label for="picture_name">Indicate the name</label>
    <input class="form-control" placeholder="(mandatory field)" type="text" name="picture[name]" id="picture_name">
  </div>
  <div class="form-group">
    <label for="picture_description">Add a description</label>
    <textarea class="form-control" name="picture[description]" id="picture_description"></textarea>
  </div>
  <div class="form-group">
    <div class="row">
      <div class="col">
        <label for="picture_category">Add a category</label>
        <input class="form-control" type="text" name="picture[category]" id="picture_category">
      </div>
      <div class="col">
        <label for="picture_price">Indicate the price (when applicable)</label>
        <input class="form-control" placeholder="0,00$ CAD" type="number" name="picture[price]" id="picture_price">
      </div>
    </div>
  </div>
  <div class="form-group">
    <div class="row">
      <div class="col">
        <p>Where do you want to add your picture?</p>
          <div>
            <input name="picture[is_home_item]" type="hidden" value="0"><input type="checkbox" value="1" name="picture[is_home_item]" id="picture_is_home_item">
            <label for="picture_is_home_item">Homepage</label>
          </div>
          <div>
            <input name="picture[is_portfolio_item]" type="hidden" value="0"><input type="checkbox" value="1" name="picture[is_portfolio_item]" id="picture_is_portfolio_item">
            <label for="picture_is_portfolio_item">Work</label>
          </div>
          <div>
            <input name="picture[is_sketchbook_item]" type="hidden" value="0"><input type="checkbox" value="1" name="picture[is_sketchbook_item]" id="picture_is_sketchbook_item">
            <label for="picture_is_sketchbook_item">Sketchbook</label>
          </div>
        <div>
          <input name="picture[is_shopping_item]" type="hidden" value="0"><input type="checkbox" value="1" name="picture[is_shopping_item]" id="picture_is_shopping_item">
          <label for="picture_is_shopping_item">Shopping</label>
        </div>
      </div>
      <div class="col">
        <div class="form-group">
          <label for="picture_photo">Select your picture</label>
          <input class="form-control-file" type="file" name="picture[photo]" id="picture_photo">
        </div>
      </div>
    </div>
  </div>
  <div class="form-group">
    <input type="submit" name="commit" value="Create Picture" class="btn btn-lg btn-primary" data-disable-with="Create Picture">
  </div>

My routes :

Rails.application.routes.draw do
  devise_for :users
  
  # Pages routes
  root to: 'pages#home'
  get 'about', to: 'pages#about'
  get 'portfolio', to: 'pages#portfolio'
  get 'sketchbook', to: 'pages#sketchbook'
  get 'shopping', to: 'pages#shopping'
  
  # Pictures routes
  resources :pictures

end

这是我在航站楼的路线

Answer 1

不太清楚为什么会发生这种情况，但不建议使用form_for，所以您应该用form_with替换它。

您可以使用模型，如@picture和form_with (如医生们中所描述的)。

<%= form_with(model: @picture) do |form| %>
  # fields
<% end %>

这应该创建一个表单DOM对象，如下所示：

<form action="/pictures" method="post" accept-charset="UTF-8" >
  <input name="authenticity_token" type="hidden" value="..." />
  ...
</form>

如果由于某种原因，您可以在method: :post中传递form_with (即。<%= form_with(model: @picture, method: :post) do |form| %>)。

Answer 2

目前，您已经得到了带有单数has_many_attached的photo。这似乎不是正确的语法。您是否尝试过更改为has_many_attached :photos并修改picture_params以将照片作为数组photos: []传递

或者，如果您想附加一张照片，那么您应该尝试在图片模型中更改为has_one_attached :photo。