sqlite3文件显示我有很多行和八列数字,任何人都可以帮助我,并告诉我这个数字是什么意思。我正在使用Windows Vista Home,ruby 2.0.0,rails 4.0.2。如果还有其他任何人需要请问我。我正在学习Ruby on Rails和开发sqlite3文件
5351 4c69 7465 2066 6f72 6d61 7420 3300
0400 0101 0040 2020 0000 000d 0000 000b
0000 0000 0000 0000 0000 0008 0000 0004
0000 0000 0000 0000 0000 0001 0000 0000
0000 0000 0000 0000 0000 0000 0000 0000
0000 0000 0000 0000 0000 0000 0000 000d
并且持续了很长时间。 这是在我安装设备后发生的,但是我确实继续上课。 我创建了迁移和引脚,但现在我尝试检查并查看引脚是否工作,我得到以下 。
irb(main):001:0> pin.first
NameError: undefined local variable or method `pin' for main:Object
from (irb):1
from c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.2/lib/rails /commands/console.rb:90:in `start'
from c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.2/lib/rails/commands/console.rb:9:in `start'
from c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:62:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
IRB(主要):002:0>
我做下一个尝试:
$ rails console
DL is deprecated, please use Fiddle
Loading development environment (Rails 4.0.2)
irb(main):001:0> pin = Pin.first
Pin Load (1.0ms) SELECT "pins".* FROM "pins" ORDER BY "pins"."id" ASC LIMIT 1
=> #<Pin id: 2, description: "mypin", created_at: "2014-09-29 21:04:24",updated_at:
"2014-09-29 21:04:24", user_id: nil>
irb(main):002:0> pin.user
=> nil
irb(main):003:0>
非常感谢您