@mymodel.user = current_user 不适合我
我遵循了这些问题（一个和两个）如何调整我的方法仅限当前用户，以便他们拥有特定的 user_id 来编辑、更新、创建和销毁其产品。
这是我的代码：
我的迁移：
class CreateProducts < ActiveRecord::Migration
def self.up
create_table :products do |t|
t.string :name
t.date :date
t.decimal :price, :default => 0, :precision => 10, :scale => 2
t.integer :user_id
t.float :latitude
t.float :longitude
控制器：
class ProductsController < ApplicationController
before_filter :authenticate_user!
def index
@products = Product.all
def show
@product = Product.find(params[:id])
def new
@product = Product.new
def edit
@product.user = current_user
@product = Product.find(params[:id])
end
def create
@product.user = current_user
@product = Product.new(params[:product])
def update
@product.user = current_user
@product = Product.find(params[:id])
def destroy
@product.user = current_user
@product = Product.find(params[:id])
@product.destroy
产品模型：
class Product < ActiveRecord::Base
attr_accessible :name, :date, :price, :tag_list
belongs_to :user
end
然后设计用户模型：
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
attr_accessible :email, :password, :password_confirmation, :remember_me
has_many :products, :dependent => :destroy
我尝试提交它，然后突然弹出：
ProductsController#create 中的NoMethodError
undefined method `user=' for nil:NilClass
我是什么遗漏或做错了？
提前致谢！
I followed these questions(one and two) on how to adjust my methods with the current user only so they have the specific user_id to edit,update, create and destroy their products.
Here is my code:
My Migration:
class CreateProducts < ActiveRecord::Migration
def self.up
create_table :products do |t|
t.string :name
t.date :date
t.decimal :price, :default => 0, :precision => 10, :scale => 2
t.integer :user_id
t.float :latitude
t.float :longitude
the Controller:
class ProductsController < ApplicationController
before_filter :authenticate_user!
def index
@products = Product.all
def show
@product = Product.find(params[:id])
def new
@product = Product.new
def edit
@product.user = current_user
@product = Product.find(params[:id])
end
def create
@product.user = current_user
@product = Product.new(params[:product])
def update
@product.user = current_user
@product = Product.find(params[:id])
def destroy
@product.user = current_user
@product = Product.find(params[:id])
@product.destroy
Product Model:
class Product < ActiveRecord::Base
attr_accessible :name, :date, :price, :tag_list
belongs_to :user
end
then the Devise User Model:
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
attr_accessible :email, :password, :password_confirmation, :remember_me
has_many :products, :dependent => :destroy
I try to submit it and then suddenly this pops up:
NoMethodError in ProductsController#create
undefined method `user=' for nil:NilClass
What am i missing or doing wrong?
Thanks in advance!
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评论（1）
您尝试在拥有产品之前分配@product.user。首先在产品上查找，然后分配用户。
对于除 create 以外的操作，您可以执行类似以下操作（假设您在
User模型中设置了has_many :products关联这将限制查找到 user_id 等于 current_user 的产品。
You are trying to assign @product.user before you have a product. Do your find on the product first, then assign the user.
For the actions other than create where you want to restrict the product to the current_user, you can do something like this (assuming you setup the
has_many :productsassociation in yourUsermodel.That will restrict find to just those products that have the user_id equal to the current_user.