.sqlite文件的Active Record set_table_name错误

Question

我正在尝试通过使用Active Record连接到.sqlite文件进行交互.我这样做:

require 'active_record'

# Connect to DB
ActiveRecord::Base.establish_connection( :adapter => 'sqlite3', :database => 'database.sqlite')

# Log the tables to make sure Active Record is connected to the DB correclty
puts ActiveRecord::Base.connection.tables

# Map from existing table records to a Active Record model
class Patient < ActiveRecord::Base
  set_table_name "ZPATIENT"
end

与数据库的连接在打印出数据库表时起作用:

ZPATIENT
ZZCONFIG
Z_PRIMARYKEY
Z_METADATA

但是将ZPATIENT表格映射到Patient Active Record模型的尝试失败了:

~/.rvm/gems/ruby-1.9.3-p448/gems/activerecord-4.0.0/lib/active_record/dynamic_matchers.rb:22:in `method_missing': undefined method `set_table_name' for Patient(Table doesn't exist):Class (NoMethodError)
    from script.rb:8:in `<class:Patient>'
    from script.rb:7:in `<main>'

不确定我做错了什么？我是否需要为Active Record进行某种迁移以了解如何将表映射到模型？

Answer 1

set_table_name去掉了.试试:

class Patient < ActiveRecord::Base
  self.table_name = 'ZPATIENT'
end