Question

Web开发新手，现在已经尝试解决了4天 - 已经通过StackOverflow上的每个解决方案，但没有一个答案对我有用。

我正在创建一个允许用户通过Paperclip上传附件和照片的应用程序。通过Devise和CanCan进行身份验证和授权

在编辑页面中，用户可以点击链接打开“编辑”按钮。页。从那里他可以看到一个表单来浏览并选择要上传的图像。点击按钮后，它会调用“更新”按钮。操作，然后呈现用户显示页面，图像保存到tmp文件夹，但不插入数据库。

这是我的用户模型

class User < ActiveRecord::Base
has_and_belongs_to_many :roles
has_attached_file :avatar, styles: {
        thumb:  '50x50>',
        square: '200x200#',
        medium: '300x300>'
    }

def role?(role)
    return !!self.roles.find_by_name(role.to_s.camelize)
end

# Validate the attached image is image/jpg, image/png, etc
validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/

# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable, :confirmable, 
     :recoverable, :rememberable, :trackable, :validatable
end

用户控制器

    class UsersController < ApplicationController
before_action :get_user, :only => [:index, :new, :edit]
before_action :accessible_roles, :only => [:new, :edit, :show, :update, :create]
load_and_authorize_resource :only => [:show, :new, :destroy, :edit, :update]

def index
  @users = User.accessible_by(current_ability, :index).limit(20)
  respond_to do |format|
    format.json { render :json => @users }
    format.xml  { render :xml => @users }
    format.html
  end
end

def new
  respond_to do |format|
    format.json { render :json => @users }
    format.xml  { render :xml => @users }
    format.html
  end
end

def show
  @user = User.find(params[:id])
  respond_to do |format|
    format.json { render :json => @users }
    format.xml  { render :xml => @users }
    format.html
  end

rescue ActiveRecord::RecordNotFound
  respond_to_not_found(:json, :xml, :html)
end

def edit
  respond_to do |format|
    format.json { render :json => @users }
    format.xml  { render :xml => @users }
    format.html
  end

rescue ActiveRecord::RecordNotFound
    respond_to_not_found(:json, :xml, :html)
end

def destroy
  @user.destroy!

  respond_to do |format|
    format.json { respond_to_destroy(:ajax) }
    format.xml  { head :ok }
    format.html { respond_to_destroy(:html) }
  end

rescue ActiveRecord::RecordNotFound
    respond_to_not_found(:json, :xml, :html)
end

def create
  @user = User.new(user_params)

  if @user.save
    respond_to do |format|
        format.json { render :json => @users.to_json, :status => 200 }
        format.xml  { head :ok }
        format.html { redirect_to :action => :index }
    end
  else
    respond_to do |format|
        format.json { render :text => "Could not create user", :status => :unprocessable_entity }
        format.xml  { head :ok }
        format.html { render :action => :new, :status => :unprocessable_entity }
    end
  end
end

def update
  if params[:user][:password].blank?
    [:password, :password_confirmation, :current_password].collect{|p| params[:user].delete(p) }
  else
    @user.errors[:base] << "The password you entered is incorrect" unless @user.valid_password?(params[:user][:current_password])
  end

  respond_to do |format|
     if @user.errors[:base].empty? and @user.update_attributes(user_params[:user])
        flash[:notice] = "Your account has been updated"
          format.json { render :json => @user.to_json, :status => 200 }
        format.xml  { head :ok }
        format.html { render :action => :show }
     else
        format.json { render :text => "Could not update user", :status => :unprocessable_entity }
        format.xml  { render :xml => @user.errors, :status => :unprocessable_entity }
        format.html { render :action => :edit, :status => :unprocessable_entity }
     end
  end

rescue ActiveRecord::RecordNotFound
    respond_to_not_found(:json, :xml, :html)
end

private

def accessible_roles
   @accessible_roles = Role.accessible_by(current_ability, :read)
end

def get_user
  @user = current_user 
end

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

以下是表单代码：

<%= form_for @user, :html => { :multipart => true } do |f| %>
<div class="field">

  <%= f.label :avatar, "Photo" %>
  <%= f.file_field :avatar %>

  <%= f.submit "Submit" %>

</div>
<% end %>

我甚至无法显示临时图像。

非常感谢任何帮助！

Show.html.erb

<%= image_tag @user.avatar.url(:medium) %>
<%= @user.email %>

回形针不将照片保存到数据库

0 个答案: