Active Record入门

Question

我有一个目前使用sqlite3 gem的脚本，但这已经变得混乱，所以我想迁移到Active Record。

我无法设置基础知识。

#!/usr/bin/ruby

require 'active_record'

ActiveRecord::Base.logger = Logger.new(File.open('database.log', 'w'))

ActiveRecord::Base.establish_connection(
  :adapter  => 'sqlite3',
  :database => 'example.db'
)

ActiveRecord::Schema.define do
  unless ActiveRecord::Base.connection.tables.include? 'admins'
    create_table :admins do |table|
      table.column :network_id,     :integer
      table.column :text,           :string
    end
  end

  unless ActiveRecord::Base.connection.tables.include? 'channels'
    create_table :channels do |table|
      table.column :network_id,     :integer
      table.column :channel_name,   :string
      table.column :channel_users,  :integer
      table.column :channel_topic,  :string
    end
  end

  unless ActiveRecord::Base.connection.tables.include? 'motds'
    create_table :motds do |table|
      table.column :network_id,     :integer
      table.column :text,           :string
    end
  end

  unless ActiveRecord::Base.connection.tables.include? 'networks'
    create_table :networks do |table|
      table.column :network_id,     :integer
      table.column :network_name,   :string
    end
  end

  unless ActiveRecord::Base.connection.tables.include? 'servers'
    create_table :servers do |table|
      table.column :network_id,     :integer
      table.column :server_ip,      :string
      table.column :server_port,    :integer
    end
  end

  unless ActiveRecord::Base.connection.tables.include? 'users'
    create_table :users do |table|
      table.column :network_id,     :integer
      table.column :global,         :integer
      table.column :global_max,     :integer
      table.column :local,          :string
      table.column :local_max,      :integer
    end
  end
end

由于某些原因，Active Record正在创建我在上面设置的更多列，但我并不完全了解如何对其进行排序。

基本上所有表都应该链接到networks表，因此为什么我在其他表中设置了network_id，但由于某种原因，Active Record正在添加其他列/主键，如{{ 1}}。

以下是id：

database.log

在Active Record中设计此功能的最佳方法是什么？其他表应该依赖于D, [2016-01-11T09:36:33.223197 #17400] DEBUG -- : (3.1ms) CREATE TABLE "admins" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "text" varchar) D, [2016-01-11T09:36:33.226336 #17400] DEBUG -- : (1.7ms) CREATE TABLE "channels" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "channel_name" varchar, "channel_users" integer, "channel_topic" varchar) D, [2016-01-11T09:36:33.229804 #17400] DEBUG -- : (2.3ms) CREATE TABLE "motds" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "text" varchar) D, [2016-01-11T09:36:33.232999 #17400] DEBUG -- : (1.7ms) CREATE TABLE "networks" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "network_name" varchar) D, [2016-01-11T09:36:33.235667 #17400] DEBUG -- : (1.4ms) CREATE TABLE "servers" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "server_ip" varchar, "server_port" integer) D, [2016-01-11T09:36:33.238509 #17400] DEBUG -- : (1.8ms) CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "network_id" integer, "global" integer, "global_max" integer, "local" varchar, "local_max" integer) 表，例如，如果某些内容试图插入networks channels network_id中networks中不存在它应该出错。

感谢您对此设计的任何帮助，让我走上正轨。