我第一次尝试使用回形针。我尝试使用头像用户,但是当我查看个人资料时,只显示“失踪”这个词。
class UsersController < ApplicationController
# GET /users
# GET /users.xml
def index
@users = User.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => @users }
end
end
# GET /users/1
# GET /users/1.xml
def show
@user = User.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @user }
end
end
# GET /users/new
# GET /users/new.xml
def new
@user = User.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @user }
end
end
# GET /users/1/edit
def edit
@user = User.find(params[:id])
end
# POST /users
# POST /users.xml
def create
@user = User.new(params[:user])
respond_to do |format|
if @user.save
format.html { redirect_to(:users, :notice => 'Registration successfull.') }
format.xml { render :xml => @user, :status => :created, :location => @user }
else
format.html { render :action => "new" }
format.xml { render :xml => @user.errors, :status => :unprocessable_entity }
end
end
end
# PUT /users/1
# PUT /users/1.xml
def update
@user = User.find(params[:id])
respond_to do |format|
if @user.update_attributes(params[:user])
format.html { redirect_to(@user, :notice => 'User was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @user.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /users/1
# DELETE /users/1.xml
def destroy
@user = User.find(params[:id])
@user.destroy
respond_to do |format|
format.html { redirect_to(users_url) }
format.xml { head :ok }
end
end
end
用户模型
class User < ActiveRecord::Base
acts_as_authentic
has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }
validates_attachment_presence :avatar
validates_attachment_size :avatar, :less_than => 5.megabytes
validates_attachment_content_type :avatar, :content_type => ['image/jpeg', 'image/png']
end
一旦我加入了验证,我在尝试创建或编辑用户时会收到错误
Avatar file name must be set.
答案 0 :(得分:1)
在视图中的表单定义中,您有:multipart =&gt;真正?类似的东西:
<%= form_tag({:action => :upload}, :multipart => true) do %>