没有方法错误在Rails 3与设计和Heroku

Question

我的Rails应用程序有一个问题，我将它部署到Heroku。当我对我的俱乐部资源进行POST时，它说:

Parameters: {"utf8"=>"✓","authenticity_token"=>"MqScpac6l9MMHdPBehqfq0mTwLCCZq2dlZLVY6wt+ow=", 
"club"=>    {"name"=>"Grün Weiß Club im PSV Kiel"}, "commit"=>"absenden"}
2012-12-31T03:10:49+00:00 app[web.1]: NoMethodError (undefined method `user_id=' for #  <Club:0x000000061269b0>):
2012-12-31T03:10:49+00:00 app[web.1]: 
2012-12-31T03:10:49+00:00 app[web.1]: 
2012-12-31T03:10:49+00:00 app[web.1]:   app/controllers/clubs_controller.rb:47:in `create'

我的模型是这样的:

class Club < ActiveRecord::Base
  default_scope :order => 'name ASC'
  attr_accessible :name, :user_id
  belongs_to :user
  has_many :memberships
  has_many :users, :through => :memberships, :order => 'name ASC'
  validates :name, presence: true, :uniqueness => true
end

和控制器创建这样的动作:

def create
  @club = Club.new(params[:club])
  @club.user_id = current_user.id
  respond_to do |format|
    if @club.save
      format.html { redirect_to @club, notice: 'Club was successfully created.' }
      format.json { render json: @club, status: :created, location: @club }
    else
      format.html { render action: "new" }
      format.json { render json: @club.errors, status: :unprocessable_entity }
    end
  end
end 

认证是由设计gem完成的。另外让我困惑的是，如果我在heroku上运行rails控制台，它会说:

irb(main):001:0> Club
=> Club(id: integer, name: string, created_at: datetime, updated_at: datetime, user_id: integer)

所以即使是DB也应该是正确的。谢谢你的帮助!

Answer 1

在控制器中尝试一下，看看是否有效:

@club = current_user.clubs.build params[:club]

代替

@club = Club.new(params[:club])
@club.user_id = current_user.id

确保User包含has_many :clubs，然后可以去掉attr_accessible :user_id