我尝试通过Rails控制台向数据库中插入值,但它不起作用。Ruby on Rails控制台错误
第一命令是
U = users.create(:名称=> “鲍勃”,:地址=> “都柏林”)
这是我运行所述第一命令
u=Users.create(:name=>"Ben",:address=>"Dublin")
(0.2ms) BEGIN
SQL (0.3ms) INSERT INTO `users` (`address`, `created_at`, `email`, `name`, `password`, `updated_at`) VALUES ('Dublin', '2012-04-16 23:15:48', NULL, 'Ben', NULL, '2012-04-16 23:15:48')
(9.1ms) COMMIT
=> #<Users id: 2, name: "Ben", password: nil, email: nil, address: "Dublin", created_at: "2012-04-16 23:15:48", updated_at: "2012-04-16 23:15:48">
后的输出
这是第二个命令
吨= tweets.create(:状态=> “我是从摆锤鸣叫”,:用户=> U)
NameError: undefined local variable or method `tweets' for main:Object
from (irb):4
from /opt/bitnami/ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands/console.rb:47:in `start'
from /opt/bitnami/ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands/console.rb:8:in `start'
from /opt/bitnami/ruby/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
推文应该是鸣叫。资本,因为它的类名,红宝石类名称以大写字母开头。如果它的关系是User.find(id).tweets.create(:status =>“bla bla”),但在这种情况下,您不需要:user =>,因为他会知道谁附加它。 By Magic – 2012-04-16 23:13:32
您好,感谢您的帮助,但是我在tweet表中创建了一个valeu,在用户表中引用? – Ben 2012-04-16 23:38:10
这是user_id,所以我的意思是每条推文都有一个user_id。 – Ben 2012-04-16 23:38:54