如何让我的图像上传在 Rails 上工作？

Question

我有一个表单，目前保存上传到我的项目的图像标题、描述和 URL。我在表单中添加了一个上传选项，现在我对它如何准确地保存到我的服务器并在上传后显示感到困惑。另外 - 这不是优先事项 - 还有一种方法可以为我的上传分配一个 url 以便用户可以共享？

我的表单：（f.file_field 图片是我用来上传图片的）

<h1>Add a picture</h1>
<%= link_to "Back to Pictures", pictures_url %>
<%= form_for @picture do |f| %>
  <p>
    <%= f.label :artist %><br>
    <%= f.text_field :artist %>
  </p>
  <p>
    <%= f.label :title %><br>
    <%= f.text_field :title %>
  </p>
    <p>
   <%= f.file_field :picture %>
  </p>
  <p>
    <%= f.label :url %><br>
    <%= f.text_field :url %>
  </p>
  <p>
    <%= f.submit "Save" %>
  </p>
<% end %>

</center>

控制器：

class PicturesController < ApplicationController

  def index
    @pictures = Picture.all
  end

  def new
    @picture = Picture.new
  end

  def create
    # make a new picture with what picture_params returns (which is a method we're calling)
    @picture = Picture.new(picture_params)
    if @picture.save
      # if the save for the picture was successful, go to index.html.erb
      redirect_to pictures_url
    else
      # otherwise render the view associated with the action :new (i.e. new.html.erb)
      render :new
    end
  end

  def show
    @picture = Picture.find(params[:id])
  end

  def edit
    @picture = Picture.find(params[:id])
  end

  def update
    @picture = Picture.find(params[:id])

    if @picture.update_attributes(picture_params)
      redirect_to "/pictures/#{@picture.id}"
    else
      render :edit
    end
  end

  def destroy
    @picture = Picture.find(params[:id])
    @picture.destroy
    redirect_to pictures_url
  end

  private
  def picture_params
    params.require(:picture).permit(:artist, :title, :url)
  end

end

感谢您的帮助！我想尽可能地减少这种情况，并且不想选择宝石。

Answer 1

您的:picture 不在您的picture_params 中允许。允许它保存在 DB

def picture_params
   params.require(:picture).permit(:artist, :title, :url, :picture)
end

Answer 2

试试回形针宝石。本教程也很有帮助。 https://richonrails.com/articles/getting-started-with-paperclip