Question

我的照片模型中有一个验证方法，它成功进行了验证，但之后创建照片时出现了一个奇怪的错误。我试图更新Minimagick但它不起作用。我知道没有验证它可以正常工作......

错误

Errno::ENOENT in PhotosController#create
No such file or directory

错误

的行

image = MiniMagick::Image.open(photo.path)

模型

 validate :validate_minimum_image_size

  def validate_minimum_image_size
    image = MiniMagick::Image.open(photo.path)
    if image[:width] <= image[:height]
      errors.add :photo, "should be 400x400px minimum!" 
    end
  end

+裁剪方法*

  def crop
    if model.crop_x.present?
      resize_to_limit(800, 500)
      manipulate! do |img|
        x = model.crop_x
        y = model.crop_y
        w = model.crop_w
        h = model.crop_h
        img.crop "#{w}x#{h}+#{x}+#{y}"
        img
      end
    end
  end

EDITED CONTROLLER

    def create
            @photo = Photo.new(photo_params)
            @photo.user = current_user

            if @photo.save
                redirect_to [current_user, @photo], notice: 'El spot se ha subido correctamente!'
            else
                if /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.match(request.user_agent) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.match(request.user_agent[0..3])
                    redirect_to [current_user, @photo], notice: 'El spot se ha subido correctamente!'
                else
                render :crop
            end
        end
    end

更新

我在Photo model中添加了新的验证方法

private 

  def validate_minimum_image_size
    if self.photo_upload_width <= self.photo_upload_height 
      errors.add :photo, "Dimensions of uploaded photo should be not less than 400x400 pixels."
    end
  end
end

但现在，它正在验证。如果照片宽度＆lt; =照片高度，它会将照片发送到裁剪，否则，它将创建它而不会成功裁剪。但是有一个问题，当它将照片发送到裁剪时，我点击“创建”，会出现以下错误：

NoMethodError in PhotosController#create
undefined method `<=' for nil:NilClass

Extracted source (around line #37):
  def validate_minimum_image_size
    if self.photo_upload_width <= self.photo_upload_height 
      errors.add :photo, "Dimensions of uploaded photo should be not less than 400x400 pixels."
    end
  end

Answer 1

由于您使用的是Carrierwave，请尝试以下方法：https://gist.github.com/kirs/1239078

您需要添加/更改的部分如下所示：

<强>模型

class Photo < ActiveRecord::Base
  attr_accessor :photo_upload_width, :photo_upload_height
  mount_uploader :photo, PhotoUploader

  validate :validate_minimum_image_size

  private

  def validate_minimum_image_size
    if self.photo_upload_width < 400 || self.photo_upload_height < 400 
      errors.add :photo, "Dimensions of uploaded photo should be not less than 400x400 pixels."
    end
  end
end

<强>上传

class PhotoUploader < CarrierWave::Uploader::Base
  include CarrierWave::MiniMagick

  # for image size validation
  # fetching dimensions in uploader, validating it in model
  before :cache, :capture_size_before_cache # callback, example here: http://goo.gl/9VGHI
  def capture_size_before_cache(new_file) 
    if model.photo_upload_width.nil? || model.photo_upload_height.nil?
      model.photo_upload_width, model.photo_upload_height = `identify -format "%wx %h" #{new_file.path}`.split(/x/).map { |dim| dim.to_i }
    end
  end
end

Errno ::在PhotosController的#ENOENT＃create - ＆gt;验证/ Minimagick

1 个答案: