如果超过高度/宽度,请使用carrierwave调整图像大小

时间:2013-10-18 14:45:59

标签: ruby-on-rails carrierwave minimagick

在我尝试自己完成之后,我环顾四周并找不到解决方案。当用户上传照片时,如果超过我的最小和最大尺寸,我希望调整它们的大小。但是我想要两个条件。侧面拍摄的照片(东/西)应保持在我设定的尺寸范围内,高照度拍摄的照片(北/南)也是如此。

例如,用户上传的图片长期存在,尺寸为3264x1840。上传应调整大小以适应584x329。如果上传小于584x329,则不会调整大小。

另一个例子是,如果用户上传了一张高大的照片并且尺寸为2448 x 3264.上传内容应调整为适合247x329。

我试图使用MiniMagick,因为我认为这是必需的。如果我只能使用CarrierWave那么这是完美的,但我认为MiniMagick应该用于调整照片大小。

我收到的错误是来自控制器def create的'undefined method resize' for #<ImageUploader:0x007f8606feb9b8>' and it points to @ photo = Photo.new(params [:photo])`。

BTW尺寸很高,因为当您上传照片时,这些通常是您手机的默认尺寸。

image_uploader.rb:

class ImageUploader < CarrierWave::Uploader::Base

   include CarrierWave::MiniMagick

 storage :file
  # storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end


  process :resize => [584, 329]

  def resize_to_limit(width, height)
        manipulate! do |img|
          img.resize "#{width}x#{height}>"
          img = yield(img) if block_given?
          img
        end
      end

  # Create different versions of your uploaded files:
   version :thumb do
     process :resize_to_limit => [200, 200]
   end

end

照片控制器:

  def create
    @photo = Photo.new(params[:photo])
    @photo.user = current_user
    if @photo.save
      flash[:notice] = "Successfully created photos."
      redirect_to :back
    else
      render :action => 'new'
    end
  end

def resize(width, height, gravity = 'Center')
  manipulate! do |img|
    img.combine_options do |cmd|
      cmd.resize "#{width}"
      if img[:width] < img[:height]
        cmd.gravity gravity
        cmd.background "rgba(255,255,255,0.0)"
        cmd.extent "#{width}x#{height}"
      end
    end
    img = yield(img) if block_given?
    img
  end
end

1 个答案:

答案 0 :(得分:2)

将图片上传器中的:resize更改为process :resize_to_fit => [584, 329]