如何获取存储在 Rails 控制器活动存储中的附件的 url [英] How can I get url of my attachment stored in active storage in my rails controller

问题描述

如何获取存储在 Rails 控制器活动存储中的 has_one 模型附件的 url.因此，我将能够将其作为 json 中的 api 的完整链接发送.到目前为止，我尝试了以下方法，但每种方法都存在各种问题:

How can I get url of my has_one model attachment stored in active storage in my rails controller. So, that I would be able to send it as full link as api in json. So far, I have tried following methods but each of them are giving various issues:

1. current_user.image.service_url ---- #<ActiveStorage::Attached::One:0x ....

1. current_user.image.service_url ---- undefined method `service_url' for #<ActiveStorage::Attached::One:0x....

Rails.application.routes.url_helpers.rails_disk_blob_path(current_user.image, only_path: true)，它给了我这样的输出:

Rails.application.routes.url_helpers.rails_disk_blob_path(current_user.image, only_path: true), it gives me an output like:

/rails/blobs/%23%3CActiveStorage::Attached::One:0x007f991c7b41b8%3E"

"/rails/blobs/%23%3CActiveStorage::Attached::One:0x007f991c7b41b8%3E"

但这不是网址，对吗?我无法在浏览器上点击并获取图像.

but this is not a url, right? I am not able to hit and get image on browser.

1. url_for ----

未定义方法`active_storage_attachment_url' #<Api::V1::UsersController:0x007f991c1eaa98

undefined method `active_storage_attachment_url' for #<Api::V1::UsersController:0x007f991c1eaa98

推荐答案

使用方法rails_blob_path 用于控制器和模型中的附件

例如，如果您需要在控制器中分配一个变量(例如cover_url)，首先应该包含url_helpers，然后使用方法rails_blob_path 带有一些参数.你可以在任何模型、工人等中做同样的事情.

Use the method rails_blob_path for attachements in a controller and models

For example, if you need to assign a variable (e.g. cover_url) in a controller, first you should include url_helpers and after use method rails_blob_path with some parameters. You can do the same in any model, worker etc.

完整示例如下:

class ApplicationController < ActionController::Base

  include Rails.application.routes.url_helpers

  def index
    @event = Event.first
    cover_url = rails_blob_path(@event.cover, disposition: "attachment", only_path: true)
  end

end

这篇关于如何获取存储在 Rails 控制器活动存储中的附件的 url的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！