如何在 ruby​​ 中以 json 形式检索活动存储附件 url

如何解决如何在 ruby​​ 中以 json 形式检索活动存储附件 url

我正在尝试检索活动存储附件的 URL 作为 JSON 响应，但我没有得到正确的响应，这是我的代码：

#projet.rb

def bar[B](f: onSuccess: A => B) = 
  Try{ some operations } match {
    case Success(value) => onSuccess(value)
    case Failure(_)     => // error handler 
  }

def funcA = bar(_ => "A")
def funcB = bar(_ => 1)

#projet_serializer.rb

class Projet < ApplicationRecord
 has_many :appartements,dependent: :destroy
 has_one_attached :image_de_couverture
 has_one_attached :situation
 has_many_attached :images
end

#projets_controller.rb

class ProjetSerializer < ActiveModel::Serializer
  include Rails.application.routes.url_helpers
  attributes :id,:nom,:gouvernorat,:localite,:surface,:description,:en_cours,:fini,:situation,:images,:image_de_couverture

  def images
    object.images.map do |image|
      rails_blob_path(image,only_path: true) if object.images.attached?
    end
  end

  def image_de_couverture
    polymorphic_url(object.image_de_couverture,only_path: true) if 
    object.image_de_couverture.attached?
  end

  def situation
    polymorphic_url(object.situation,only_path: true) if object.situation.attached?
  end
end

这是我使用此代码得到的响应

class ProjetsController < ApplicationController
  # show all projects
  def index
    @projets = Projet.all
    render json: @projets
  end

  def set_projet
    @projet = Projet.find(params[:id])
  end

  def projet_params
    params.require(:projet).permit(:nom,images: [])
  end
end

代替

[
  {
  id: 1,nom: "Test",gouvernorat: "Test",localite: "Test",surface: 30303,description: "Test",en_cours: true,fini: true,situation: "/rails/active_storage/blobs/redirect/eyJfcmfpbHMiOnsibWVzc2FnZSI6IkJBaHBFdz09IiwiZXhwIjpudWxsLCJwdXIiOijibG9iX2lkIn19--50589feef3ab662f5fb9877dbf4f0a21c79e2412/lame_rideau1.jpg",images: [
  "/rails/active_storage/blobs/redirect/eyJfcmfpbHMiOnsibWVzc2FnZSI6IkJBaHbedz09IiwiZXhwIjpudWxsLCJwdXIiOijibG9iX2lkIn19--0550f31bd4e562c76dfd1aff9f0beac6483e1651/1.jpg","/rails/active_storage/blobs/redirect/eyJfcmfpbHMiOnsibWVzc2FnZSI6IkJBaHBFQT09IiwiZXhwIjpudWxsLCJwdXIiOijibG9iX2lkIn19--11ec06652e38fc43b54ef93187905f4591115d3c/2.jpg",],image_de_couverture: null
  },]

我想要附件的链接。

提前致谢。

解决方法

def images
    object.images.map do |image|
      Rails.application.routes.url_helpers.rails_blob_url(image,only_path: true) if object.images.attached?
    end
  end

,

尝试通过 rails_blob_path 在您的 rails_blob_url 中更改 ProjetSerializer#images 助手。您还需要在应用程序文件中设置主机配置。 source

# config/application.rb

class Application < Rails::Application
  ...
  routes.default_url_options = { host: 'localhost:3000' }
end