MiniMagick错误:如何用MiniMagick生成OG图像

Question

所以我在做一个Rails应用程序。它生成OG图像，绘制成用户输入的文本。例如，输入"Hello“，保存它，然后应用程序生成写到"Hello”的OG映像。

但这一错误却发生在以下情况：

​

应用程序/控制器/审查_控制器.reviews

include SetupOgbImage

def create
  @review = current_user.active_reviews.create(create_params)
  @review.image = build(@review.content)
  if @review.save
    flash[:success] = "Successfully added a review!"
    redirect_to review_path(id: @review.id)
  else
    flash[:alert] = "Failed to add a review."
    redirect_to user_path(id: @review.reviewed_id)
  end
end

应用程序/控制器/关注点/setup_ogb_Image.rb

module SetupOgbImage
    def build(text)
        text = prepare_text(text)
        img = MiniMagick::Image.open(Settings.ogb.base_image_path)
        img.combine_options do |config|
        config.font Settings.ogb.font_path
        config.fill Settings.ogb.color
        config.gravity Settings.ogb.gravity
        config.pointsize Settings.ogb.font_size
        config.draw "text #{Settings.ogb.text_position} #{text}"
        end
        img
    end

    def prepare_text(text)
        text.scan(/.{1,#{Settings.ogb.indention_count}}/)[0...Settings.ogb.row_limit].join("\n")
    end
end

settings.yml

ogb:
  base_image_path: ./app/assets/images/ogb_bg_image.png
  gravity: center
  text_position: "0,30"
  font_path: ./app/assets/fonts/Hind-Medium.ttf
  font_size: 24
  color: "#fff"
  indention_count: 60
  row_limit: 10
format:
  uuid: !ruby/regexp /\A[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\z/

Answer 1

您应该将文本放入引号中，否则，shell即执行命令，处理“Hello”和“world！”作为调用mogrify中的两个不同参数

#                                               ⇓       ⇓
config.draw "text #{Settings.ogb.text_position} '#{text}'"