我正在使用 CarrierWave 从 AngularJS 客户端上传文件。为 carrierWave 生成的上传器位于另一个命名空间中，而控制器位于另一个命名空间中。< /强>
因此，当我在控制器中尝试创建 上传者的对象时，我正在获取以下错误：
uninitialized constant Api::V1::ProductsController::FileUploader
这是我的目录结构：
app
|--controllers
|--api
|--controllers
|--api
|--v1
|--products_controller.rb
|--uploaders
|--file_uploader.rb
产品控制器
class Api::V1::ProductsController < ApplicationController
respond_to :json
......
def createFromExcel
puts "------------------------------------"
puts params[:file]
puts "------------------------------------"
uploader = FileUploader.new
uploader.store!(params[:file])
end
end
FileUploader类：
class FileUploader < CarrierWave::Uploader::Base
# Include RMagick or MiniMagick support:
# include CarrierWave::RMagick
# include CarrierWave::MiniMagick
# Choose what kind of storage to use for this uploader:
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
# Provide a default URL as a default if there hasn't been a file uploaded:
# def default_url(*args)
# # For Rails 3.1+ asset pipeline compatibility:
# # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
#
# "/images/fallback/" + [version_name, "default.png"].compact.join('_')
# end
# Process files as they are uploaded:
# process scale: [200, 300]
#
# def scale(width, height)
# # do something
# end
# Create different versions of your uploaded files:
# version :thumb do
# process resize_to_fit: [50, 50]
# end
# Add a white list of extensions which are allowed to be uploaded.
# For images you might use something like this:
def extension_whitelist
%w(xlsx xls)
end
# Override the filename of the uploaded files:
# Avoid using model.id or version_name here, see uploader/store.rb for details.
# def filename
# "something.jpg" if original_filename
# end
end
如何在控制器中创建 FileUploader类的对象？
答案 0 :(得分：0)
尝试使用uploader = ::FileUploader.new
答案 1 :(得分：0)
要从main（＆＃34;全局命名空间＆＃34;）而不是当前模块嵌套（＆＃34;命名空间＆＃34;）引用常量，请使用:: < / p>
class Api::V1::ProductsController < ApplicationController
respond_to :json
# use snake_case not camelCase
def create_from_excel
uploader = ::FileUploader.new
uploader.store!(params[:file])
end
end
请参阅：