脱离rails 使用Active Record

目录结构

database.yml

 development:
   adapter: sqlite3
   database: db/test.db
   pool: 5
   timeout: 5000

001_schema.rb

 require 'active_record'
 class Schema <ActiveRecord::Migration
   def self.up
     create_table :customers, force: true do |t|
       t.string :name
       t.string :address

       t.timestamps
     end
   end

   def self.down
     drop_table :customers
   end
 end

customer.rb

 class Customer <ActiveRecord::Base

 end

ar.rb

 require 'rubygems'
 require 'active_record'
 require 'yaml'
 require 'logger'

 ActiveRecord::Base.logger = Logger.new(STDOUT)
 dbconfig = YAML::load(IO.read('config/database.yml'))
 ActiveRecord::Base.establish_connection(dbconfig['development'])

 load 'models/customer.rb'

Gemfile

 source 'https://gems.ruby-china.org'
 gem 'activerecord'
 gem 'sqlite3'
 gem 'rake'

Rakefile

 load 'ar.rb'
 require 'active_record'

 task :default => :migrate

 desc 'Run migrations'
 task :migrate do
   ActiveRecord::Migrator.migrate('db/migrate', ENV['VERSION'] ? ENV['VERSION'].to_i : nil)
 end

使用说明

在程序目录先执行 bundle install

1  在ruby目录执行 命令:

　　

 rudy-Pc :: ~/ruby » rake
 D, [2016-06-15T14:36:24.712037 #6726] DEBUG -- :    (4.4ms)  CREATE TABLE "schema_migrations" ("version" varchar NOT NULL)
 D, [2016-06-15T14:36:24.712258 #6726] DEBUG -- :    (0.1ms)  select sqlite_version(*)
 D, [2016-06-15T14:36:24.716823 #6726] DEBUG -- :    (4.2ms)  CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
 D, [2016-06-15T14:36:24.717531 #6726] DEBUG -- :   ActiveRecord::SchemaMigration Load (0.1ms)  SELECT "schema_migrations".* FROM "schema_migrations"
 I, [2016-06-15T14:36:24.720448 #6726]  INFO -- : Migrating to Schema (1)
 D, [2016-06-15T14:36:24.720794 #6726] DEBUG -- :    (0.0ms)  begin transaction
 == 1 Schema: migrating ========================================================
 -- create_table(:customers, {:force=>true})
 DEPRECATION WARNING: `#timestamps` was called without specifying an option for `null`. In Rails 5, this behavior will change to `null: false`. You should manually specify `null: true` to prevent the behavior of your existing migrations from changing. (called from block in up at /home/rudy/ruby/db/migrate/001_schema.rb:8)
 D, [2016-06-15T14:36:24.722126 #6726] DEBUG -- :    (0.2ms)  CREATE TABLE "customers" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar, "address" varchar, "created_at" datetime, "updated_at" datetime)
    -> 0.0012s
 == 1 Schema: migrated (0.0013s) ===============================================

 D, [2016-06-15T14:36:24.726539 #6726] DEBUG -- :   SQL (0.1ms)  INSERT INTO "schema_migrations" ("version") VALUES (?)  [["version", "1"]]
 D, [2016-06-15T14:36:24.731421 #6726] DEBUG -- :    (4.7ms)  commit transaction

2 在ruby目录创建 active_record.rb

　　

 load 'ar.rb'
 1.upto(10) do |x|
   customer = Customer.new
   customer.name ="fak#{x}"
   customer.address = 'beijing'
   customer.save
 end

我在rubymine中直接右键单击文件，选择  run active_record

/home/rudy/.rbenv/versions/2.2.3/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /home/rudy/ruby/active_record.rb
D, [2016-06-15T15:03:22.677823 #7646] DEBUG -- :    (0.1ms)  begin transaction
D, [2016-06-15T15:03:22.684157 #7646] DEBUG -- :   SQL (0.2ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak1"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.682053"], ["updated_at", "2016-06-15 07:03:22.682053"]]
D, [2016-06-15T15:03:22.691053 #7646] DEBUG -- :    (6.6ms)  commit transaction
D, [2016-06-15T15:03:22.691285 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.691801 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak2"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.691356"], ["updated_at", "2016-06-15 07:03:22.691356"]]
D, [2016-06-15T15:03:22.698569 #7646] DEBUG -- :    (6.6ms)  commit transaction
D, [2016-06-15T15:03:22.698767 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.699331 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak3"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.698849"], ["updated_at", "2016-06-15 07:03:22.698849"]]
D, [2016-06-15T15:03:22.702730 #7646] DEBUG -- :    (3.2ms)  commit transaction
D, [2016-06-15T15:03:22.702950 #7646] DEBUG -- :    (0.1ms)  begin transaction
D, [2016-06-15T15:03:22.703435 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak4"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.703015"], ["updated_at", "2016-06-15 07:03:22.703015"]]
D, [2016-06-15T15:03:22.706785 #7646] DEBUG -- :    (3.2ms)  commit transaction
D, [2016-06-15T15:03:22.706989 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.707486 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak5"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.707050"], ["updated_at", "2016-06-15 07:03:22.707050"]]
D, [2016-06-15T15:03:22.710844 #7646] DEBUG -- :    (3.2ms)  commit transaction
D, [2016-06-15T15:03:22.711062 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.711585 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak6"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.711146"], ["updated_at", "2016-06-15 07:03:22.711146"]]
D, [2016-06-15T15:03:22.714980 #7646] DEBUG -- :    (3.2ms)  commit transaction
D, [2016-06-15T15:03:22.715185 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.715699 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak7"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.715263"], ["updated_at", "2016-06-15 07:03:22.715263"]]
D, [2016-06-15T15:03:22.718966 #7646] DEBUG -- :    (3.1ms)  commit transaction
D, [2016-06-15T15:03:22.719175 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.719661 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak8"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.719240"], ["updated_at", "2016-06-15 07:03:22.719240"]]
D, [2016-06-15T15:03:22.722971 #7646] DEBUG -- :    (3.1ms)  commit transaction
D, [2016-06-15T15:03:22.723230 #7646] DEBUG -- :    (0.1ms)  begin transaction
D, [2016-06-15T15:03:22.723924 #7646] DEBUG -- :   SQL (0.2ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak9"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.723325"], ["updated_at", "2016-06-15 07:03:22.723325"]]
D, [2016-06-15T15:03:22.727346 #7646] DEBUG -- :    (3.2ms)  commit transaction
D, [2016-06-15T15:03:22.727552 #7646] DEBUG -- :    (0.0ms)  begin transaction
D, [2016-06-15T15:03:22.728065 #7646] DEBUG -- :   SQL (0.1ms)  INSERT INTO "customers" ("name", "address", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "fak10"], ["address", "beijing"], ["created_at", "2016-06-15 07:03:22.727617"], ["updated_at", "2016-06-15 07:03:22.727617"]]
D, [2016-06-15T15:03:22.731302 #7646] DEBUG -- :    (3.0ms)  commit transaction

Process finished with exit code 0