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获取对json api的请求,我得到一个错误:多次调用redirect。我没有重定向

request api ruby-on-rails

AlbertMunichMar · 技术社区 · 6 年前

从外部应用程序,我向api发出get请求:

  def index
    user_id = params["user_id"].to_i
    api_url = "#{Rails.configuration.zaina_platform_path}/api/v1/users/#{user_id}/projects.json" 
    html_file = open(api_url).read

    @deal_rooms = JSON.parse(html_file)
  end

我最终采用了正确的方法(api的端点),并且成功地过滤了数组:

  def filter
    user_id = params["user_id"].to_i
    guest_user = User.find(user_id)
    all_projects = policy_scope(Project)

    @user_projects = user_projects(all_projects, guest_user)
  end

然后,在视图中创建JSON响应:

# app/views/api/v1/projects/filter.json.jbuilder
json.array! @user_projects do |project|
  json.extract! project, :id, :name, :description
end

AbstractController::DoubleRenderError (Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".):

app/controllers/api/v1/base_controller.rb:30:in `internal_server_error'

我不明白为什么,我没有重定向。关键是,show和index工作,filter,这不是rails方法,它不工作。有什么想法吗?

完整的日志错误如下:

Started GET "/api/v1/users/1/projects.json" for 127.0.0.1 at 2018-07-19 22:28:13 +0200
Processing by Api::V1::ProjectsController#filter as JSON
  Parameters: {"user_id"=>"1"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  Project Load (0.6ms)  SELECT "projects".* FROM "projects"
  ProjectMember Load (0.2ms)  SELECT "project_members".* FROM 
  CACHE EntrepreneurProfile Load (0.0ms)  SELECT  "entrepreneur_profiles".* FROM "entrepreneur_profiles" WHERE "entrepreneur_profiles"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  CACHE User Load (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 3], ["LIMIT", 1]]
  Rendering api/v1/projects/filter.json.jbuilder
  Rendered api/v1/projects/filter.json.jbuilder (0.6ms)
Completed 500 Internal Server Error in 152ms (Views: 4.3ms | ActiveRecord: 4.9ms)



AbstractController::DoubleRenderError (Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".):

app/controllers/api/v1/base_controller.rb:30:in `internal_server_error'

还有路线

Rails.application.routes.draw do
  devise_for :users, controllers: { sessions: "sessions" }
  # devise_for :users
  root to: 'pages#home'
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html

  namespace :api, defaults: { format: :json } do
    namespace :v1 do
      get "users/:user_id/projects", to: "projects#filter"

      resources :projects, only: [ :show, :index ]
      # get "/api/v1/projects/"
    end
  end

end

1 回复 | 直到 6 年前

AlbertMunichMar 6 年前

我找到了答案。

在我的过滤方法中,我使用:

all_projects = policy_scope(Project)

  after_action :verify_policy_scoped, only: [:index, :filter] ###

这是一个权威问题。这个错误完全是误导,不是重定向问题。

我发现它正在检查base_controller.rb中的异常

  def internal_server_error(exception)
    if Rails.env.development?
      response = { type: exception.class.to_s, message: exception.message, backtrace: exception.backtrace }
    else
      response = { error: "Internal Server Error" }
    end
    render json: response, status: :internal_server_error
  end