Rails 3 中图像路径的完整 url [英] Full url for an image-path in Rails 3

问题描述

我有一个图像，其中包含载波上传:

I have an Image, which contains carrierwave uploads:

Image.find(:first).image.url #=> "/uploads/image/4d90/display_foo.jpg"

在我看来，我想为此找到绝对网址.附加 root_url 导致双 /.

In my view, I want to find the absolute url for this. Appending the root_url results in a double /.

root_url + image.url #=> http://localhost:3000//uploads/image/4d90/display_foo.jpg

我不能使用 url_for(我知道)，因为要么允许传递一个路径，或一个选项列表来识别资源和:only_path选项.由于我没有可以通过控制器"+操作"识别的资源，因此我无法使用 :only_path 选项.

I cannot use url_for (that I know of), because that either allows passing a path, or a list of options to identify the resource and the :only_path option. Since I do't have a resource that can be identified trough "controller"+"action" I cannot use the :only_path option.

url_for(image.url, :only_path => true) #=> wrong amount of parameters, 2 for 1

在 Rails3 中创建路径到完整 url 的最干净和最好的方法是什么?

What would be the cleanest and best way to create a path into a full url in Rails3?

推荐答案

try path method

try path method

Image.find(:first).image.path

UPD

request.host + Image.find(:first).image.url

你可以把它包裹起来作为永远干燥它的帮手

and you can wrap it as a helper to DRY it forever

request.protocol + request.host_with_port + Image.find(:first).image.url

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