Question

我正试图允许用户从form_for上传带有载波波宝石的图像，但出现此错误：

不允许的参数：：avatar

（请参阅下面的完整堆栈跟踪）

我使用的是devise gem，因此我必须按照文档中的说明在application_controller中添加强参数，但是它不起作用。

application_controller.rb

class ApplicationController < ActionController::Base

  before_action :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    attributes = [:name, :email, :avatar]
    devise_parameter_sanitizer.permit(:sign_up, keys: attributes)
    devise_parameter_sanitizer.permit(:account_update, keys: attributes)
  end
end

users_controller.rb

class UsersController < ApplicationController

  before_action :ensure_admin, :except => :show

  def index
    @users = User.paginate(:page => params[:page], :per_page => 8)
  end

  def show
    @user = User.find_by_name(params[:id])
  end

  def edit
    @user = User.find(params[:id])
  end

  def update
    @user = User.find(params[:id])
    if @user.update(user_params)
      redirect_to users_path, :notice => "User updated."
    else
      redirect_to users_path, :alert => "Unable to update user."
    end
  end

  def destroy
    user = User.find(params[:id])
    user.destroy
    redirect_to users_path, :notice => "User deleted."
  end

  private

  def ensure_admin
    if(current_user.role == 'admin')
      return
    end
    redirect_to root_path, :alert => "Access denied."
  end

  def user_params
    params.require(:user).permit(:avatar, :role, :email, :name, :password)
  end
end

我的观点：

<div class="field">
  <%= f.label :avatar %>
  <%= f.file_field :avatar, class: 'form-control' %>
</div>

</div>

<div class="field">
  <%= f.label I18n.translate('user.current_password') %> <i><%= I18n.translate('user.needed_to_confirm') %></i>
  <%= f.password_field :current_password, placeholder: I18n.translate('user.current_password'), autocomplete: "current-password", class: 'form-control' %>
</div>

<div class="actions">
  <%= f.submit I18n.translate('control.update'), class: 'form-control btn sign-up-button' %>
</div>

用户模型

class User < ApplicationRecord

  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable,
         :omniauthable, :omniauth_providers => [:facebook]

  mount_uploader :avatar, AvatarUploader
end

schema.rb

ActiveRecord::Schema.define(version: 2019_07_30_090404) do

  enable_extension "plpgsql"

  create_table "users", force: :cascade do |t|
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "provider"
    t.string "uid"
    t.string "name"
    t.text "image"
    t.string "role"
    t.string "avatar"
    t.index ["email"], name: "index_users_on_email", unique: true
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
  end
end

完整堆栈跟踪：

在2019-08-02 11:23:40为127.0.0.1开始PUT“ / users？locale = en” +0200通过RegistrationsController＃update作为HTML参数进行处理：{“ utf8” =>“✓”， “ authenticity_token” =>“ k4pnLdkhc9sFOLax51vkSv0SA8SfnL7Niw3gfo60nmLfBS1I7FD25P54Q / 1qzF4aHIFiBtvq5TzLKk1 / LwZHzw ==”， “用户” => {“名称” =>“ Clovis5”，“电子邮件” =>“ clovi@clovi.com”， “ avatar” =>＃， @ original_filename =“ IMG_20190712_150908_155__01.jpg”， @ content_type =“ image / jpeg”，@ headers =“ Content-Disposition：form-data; 名称= \“用户[头像] \”; filename = \“ IMG_20190712_150908_155__01.jpg \” \ r \ n内容类型： image / jpeg \ r \ n“>，”密码“ =>” [已过滤]“， “ password_confirmation” =>“ [已过滤]”， “ current_password” =>“ [FILTERED]”}，“ commit” =>“ Update”，“ locale” =>“ en”} 用户负载（0.4毫秒）选择“用户”。*从“用户”到“用户”。“ id” = $ 1 ORDER BY“ users”。“ id” ASC LIMIT $ 2 [[“ id”，15]，[“ LIMIT”，1]]↳ /Users/clovisgenevard/.rvm/gems/ruby-2.5.3/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98 用户负载（0.3毫秒）选择“用户”。*从“用户”位置“用户”。“ id” = $ 1 LIMIT $ 2 [[“ id”，15]，[“ LIMIT”，1]]↳ /Users/clovisgenevard/.rvm/gems/ruby-2.5.3/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98 不允许的参数：：avatar（0.1ms）BEGIN↳ /Users/clovisgenevard/.rvm/gems/ruby-2.5.3/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98 （0.1ms）提交↳ /Users/clovisgenevard/.rvm/gems/ruby-2.5.3/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98 不允许的参数：：avatar不允许的参数：：avatar 不允许的参数：：avatar重定向到 http://localhost:3000/?locale=en完成了137毫秒内找到302 （ActiveRecord：1.0毫秒）

如何修复Ruby on Rails中的“不允许的参数：: avatar”错误

0 个答案: