Rails类型不匹配问题

时间:2013-07-10 18:53:43

标签: ruby-on-rails ruby

我正在关注这个答案:https://stackoverflow.com/a/8753998/561634并尝试根据用户制作一个user_post_id,就像答案中所描述的那样。

最终目标是拥有像website.com/username/posts/4这样的网址,其中4是来自该特定用户的第4个帖子,而不是像现在网站http://username/posts/4将显示第4个帖子在数据库中。

我收到了这个错误:

ActiveRecord::AssociationTypeMismatch in PostsController#create User(#2171866060) expected, got String(#2152189000)

我的控制器创建方法如下所示:

def create
  @post = Post.new(post_params)
  @post.user = current_user.id
  respond_to do |format|
    if @post.save
      format.html { redirect_to post_path(username: current_user.username, id: @post.id), notice: 'Post was successfully created.'  }
      format.json { render action: 'show', status: :created, location: @post }
    else
      format.html { render action: 'new' }
      format.json { render json: @post.errors, status: :unprocessable_entity }
    end
  end
end

我的模型看起来像这样:

before_save :set_next_user_post_id

validates :user_post_id, :uniqueness => {:scope => :user}

def to_param
  self.user_post_id.to_s
end
belongs_to :user

private
def set_next_user_post_id
  self.user_post_id ||= get_new_user_post_id
end

def get_new_user_post_id
  user = self.user
  max = user.posts.maximum('user_post_id') || 0
  max + 1
end

感谢您的帮助!

1 个答案:

答案 0 :(得分:2)

这一行:

 @post.user = current_user.id

应该是@post.user = current_user@post.user_id = current_user.id