Question

嗨，我在控制器操作中给出了这个：

def create
    @department = Department.create(department_params)
    if @department.attachment.attach_content_type == 'image\/.*'
      render :action => :new
    else
      redirect_to departments_path, notice: I18n.t('department_created')
    end
  end

我在我的参数中得到了这个

Parameters: {"utf8"=>"✓", "authenticity_token"=>"Y2GmRyk6SEh12vJQMEWpdphojFeCXWxhECLaJ1bBww6sZ7P9CmjLEmxK/vGPx2tZ+15zy0W4+tYf26zpHSL9Yw==", "department"=>{"name"=>"Quality Assurancebnnnnnnnnnnnn", "attachment_attributes"=>{"attach"=>#<ActionDispatch::Http::UploadedFile:0xb41fac20 @tempfile=#<Tempfile:/tmp/RackMultipart20150608-4331-a3x9h7.jpeg>, @original_filename="index.jpeg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"department[attachment_attributes][attach]\"; filename=\"index.jpeg\"\r\nContent-Type: image/jpeg\r\n">}}, "button"=>""}

它不会进入我的if条件，而是在我的其他部分，但是content_type是image / jpeg，我想如果我的content_type从图像开始那么它将无法保存。我也试过这个

p "*********************************8"
    p (@department.attachment.attach_content_type).to_s
    @content_type = (@department.attachment.attach_content_type).to_s
    p 'rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr'
    p @content_type == "image\/.*"

但它在控制台中给出了这个输出：

"*********************************8"
"image/jpeg"
"rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr"
false

请指导如何解决此问题。

Answer 1

您已将正则表达式定义为字符串：'image\/.*'

尝试改为：

if @department.attachment.attach_content_type.to_s =~ /image\/.*/

在rails4中匹配控制器条件中的正则表达式

1 个答案: