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

我有一张图片，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 会产生双/.

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)，因为或都允许传递路径，所以或可以使用选项列表来标识资源和:only_path选项.由于我没有可通过控制器" +动作"识别的资源，因此无法使用: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中创建指向完整URL的路径的最干净，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

尝试path方法

Image.find(:first).image.path

UPD

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

您可以将其包装为帮助剂，以使其永久干燥

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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