Question

我已经在项目上使用attachment_fu很长一段时间了，一切都很好，但现在我正试图将项目带到rails 2.3.3我遇到了一个让我疯狂的奇怪错误。附件（本例中为徽标）在创建时正确验证，但在更新时验证失败。我已经调试了它并且它失败了初始验证，但似乎没有抛出异常，或者至少没有抛出一个被我在控制器中拯救的东西。好像我已经尝试了一切，但无法想出这个。

控制器：

  # POST /tournaments
  # POST /tournaments.xml
  def create
    # Build tournament
    @tournament = Tournament.new(params[:tournament].merge(:user_id => current_user.id) )

    # Save the uploaded attachments
    params[:uploads].each do |upload|
      @tournament.documents << Document.new({:uploaded_data => upload[:document]}.merge(:description => upload[:description]))
    end unless params[:uploads].nil?

    # if supplied save an event logo
    @logo = Logo.new({:uploaded_data => params[:logo][:upload_data]}) unless params[:logo].nil? or params[:logo][:upload_data].blank?  
    @tournament.logo = @logo unless @logo.nil?     

    respond_to do |format|
      begin
        Tournament.transaction do    
          @tournament.logo.save! unless @tournament.logo.nil?
          @tournament.save!  
        end
        flash[:notice] = 'Tournament was successfully created.'
        format.html { redirect_to tournament_url(@tournament) }
        format.xml  { head :created, :location => tournament_url(@tournament) }        
      rescue 
          flash[:notice] = 'Errors prevented your Tournament from being saved'
        format.html { render :action => "new" }
        format.xml  { render :xml => @tournament.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /tournaments/1
  # PUT /tournaments/1.xml
  def update
    @tournament = Tournament.find(params[:id])
    @tournament.user_id = session[:orig_user_id]

    respond_to do |format|
      begin
        Tournament.transaction do   
          # Update Logo if necessary
          unless params[:logo][:upload_data].blank?
            @tournament.logo.destroy unless @tournament.logo.nil?
            @tournament.logo = Logo.new({:uploaded_data => params[:logo][:upload_data]}.merge(:user_id => current_user.id)) 
          end   
          # Save any uploaded documents
          params[:uploads].each do |upload|
            @tournament.documents << Document.new({:uploaded_data => upload[:document]}.merge(:description => upload[:description]))
          end unless params[:uploads].nil?   
          # Update Tournamnet Attributes
          @tournament.attributes = params[:tournament]  
          # Save the Tournament
          @tournament.save!         
        end
        flash[:notice] = 'Tournament was successfully updated.' 
        format.html { redirect_to tournament_url(@tournament) }
        format.xml  { head :ok, :location => tournament_url(@tournament) }        
      rescue 
          flash[:notice] = 'Errors prevented your Tournament from being updated' 
        format.html { render :action => "edit" }
        format.xml  { render :xml => @tournament.errors, :status => :unprocessable_entity }
      end
    end
  end

徽标模型：

    class Logo < Asset    

  validate_on_create :attachment_valid? 

  has_attachment :content_type => :image, 
    :storage => :file_system, 
    :max_size => 4.megabytes,
    :resize_to => '810x150>',  
    :processor  => :ImageScience,
    :thumbnails => { :thumb => '270x50>'  }  


  def attachment_valid? 
    content_type = attachment_options[:content_type] 
    unless content_type.nil? || content_type.include?(self.content_type) 
      errors.add(:upload_data, " * must be an image file (jpg, gif, or png)")  
    end 
    size = attachment_options[:size] 
    unless size.nil? || size.include?(self.size)               
      errors.add(:upload_data, "* image must be 4MB or less")  
    end   
  end 


  before_thumbnail_saved do |thumbnail|
    record = thumbnail.parent
    thumbnail.user_id = record.user_id 
    thumbnail.listing_id = record.listing_id
  end

end

我正在运行以下

Rails 2.3.3

image_science 1.2.0

由于 --Tim

Answer 1

您还可以使用：before_save回调来测试对象。如果它无效，则引发异常。

Answer 2

尝试添加：

validate_on_update :attachment_valid?

Attachment_fu无法验证更新

2 个答案: