Rails 3.1：將project_id與新上傳的圖像相關聯

Question

我正在上傳圖像，並希望將其與當前項目相關聯。我位於URL example.com/projects/1的項目中並呈現此內容形式：

<%= semantic_form_for @image, :html => { :multipart => true } do |f|%> 
    <%= f.semantic_errors %> 
    <%= f.inputs do %> 
    <%= f.input :title %> 
    <%= f.input :description %> 
    <%= f.input :image, :as => :file %> 
    <% end %> 
    <%= f.buttons do %> 
    <%= f.commit_button :label => 'Upload Image', :button_html => { :class => "btn primary" } %> 
    <% end %> 
<% end %> 

我在image.rb模型，belongs_to :project和project.rb模型設定，has_many :images

我images_controller.rb創建方法是這樣的：

def create 
    image = params[:image] 
    if user_signed_in? 
    @image = Image.new(:title => image[:title], 
         :description => image[:description], 
         :user_id => current_user.id, 
         :project_id => params[:id]) 
    if @image.save 
    flash[:success] = "Successfully uploaded an image" 
    redirect_to project_path(params[:id]) and return 
    else 
    flash[:error] = "Error with image upload" 
    redirect_to new_image_path and return 
    end 
else 
    redirect_to root_path 
end  
end 

圖像已創建，但未能將圖像與project_id關聯。我知道問題是params[:id]沒有拉入project_id，我該如何從網址中提取項目ID並將其與圖片關聯？

Answer 1

您應該使用您的關聯來創建新的圖像。

@image = Project.find(params[:id]).images.create(:title => image[:title], 
        :description => image[:description], 
        :user => current_user) 
if @image.save... 

如果這不起作用，請張貼您的routes.rb的內容和從發佈請求中選中的url。