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我一直在试图实现一个Facebook风格的朋友系统。我读过几篇教程,并且无法理解我在做什么错误。友谊控制器和添加好友的视图中的链接工作,但在数据库级别,它会引发错误。友谊自助参考
当我打开轨道控制台,并提出:
User.find(1).friends << User.find(2)
我得到:
SQL (0.4ms) INSERT INTO "friendships" ("user_id", "friend_id", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["user_id", 1], ["friend_id", 2], ["created_at", "2017-10-14 15:01:28.364691"], ["updated_at", "2017-10-14 15:01:28.364691"]]
(0.1ms) rollback transaction
ActiveRecord::StatementInvalid: SQLite3::SQLException: no such table: main.friends: INSERT INTO "friendships" ("user_id", "friend_id", "created_at", "updated_at") VALUES (?, ?, ?, ?)
from (irb):1
user.rb
has_many :friendships, dependent: :destroy
has_many :friends, through: :friendships
# these are used in the controller
def befriend(user)
friends << user
end
def unfriend(user)
friends.delete(user)
end
def friends?(user)
friends.include?(user)
end
friendship.rb
belongs_to :user
belongs_to :friend, class_name: 'User', foreign_key: "friend_id"
validates :user_id, presence: true
validates :friend_id, presence: true
我正在使用Devise进行身份验证。
嗨,你的代码似乎不幸产生同样的错误。我认为这个问题是,当创建一个友谊时,它会抛出'没有这样的表:main.friends'错误。铲子语法(<<)将第二个用户添加到第一个用户的集合代理中并创建了友谊,但似乎在创建友谊方面存在问题 – mef27