# Unidom Standard 标准领域模型引擎

[![License](https://img.shields.io/badge/license-MIT-green.svg)](http://opensource.org/licenses/MIT)
[![Gem Version](https://badge.fury.io/rb/unidom-standard.svg)](https://badge.fury.io/rb/unidom-standard)

Unidom (UNIfied Domain Object Model) is a series of domain model engines. The Standard domain model engine includes the Standard and Standard Association models.
Unidom (统一领域对象模型)是一系列的领域模型引擎。标准领域模型引擎包括标准和标准关联的模型。

## Recent Update
Check out the [Road Map](ROADMAP.md) to find out what's the next.
Check out the [Change Log](CHANGELOG.md) to find out what's new.

## Usage in Gemfile
```ruby
gem 'unidom-standard'
```

## Run the Database Migration
```shell
rake db:migrate
```
The migration versions start with 200006.

## Call the Model
```ruby
gbk = Unidom::Standard::Standard.number_is('GBK').first
gbk.source_standards.merge(Unidom::Standard::StandardAssociating.association_coded_as('REVS').valid_at.alive).valid_at.alive
# The standards revises GBK.
gbk.target_standards.merge(Unidom::Standard::StandardAssociating.association_coded_as('REVS').valid_at.alive).valid_at.alive
# The standards revised by GBK, such as GB2312.

# GBK revise GB2312
Unidom::Standard::StandardAssociating.associate! gbk, with: gb2312, due_to: 'REVS'
```



## Inlcude the Concerns
```ruby
include Unidom::Standard::Concerns::AsSourceStandard
include Unidom::Standard::Concerns::AsTargetStandard
```

### As Source Standard concern
The As Source Standard concern do the following tasks for the includer automatically:  
1. Define the has_many :target_associatings macro as: ``has_many :target_associatings, class_name: 'Unidom::Standard::StandardAssociating', foreign_key: :source_id``
2. Define the has_many :target_standards macro as: ``has_many :target_standards, through: :target_associatings, source: :target``

### As Target Standard concern
The As Target Standard concern do the following tasks for the includer automatically:  
1. Define the has_many :source_associatings macro as: ``has_many :source_associatings, class_name: 'Unidom::Standard::StandardAssociating', foreign_key: :target_id``
2. Define the has_many :source_standards macro as: ``has_many :source_standards, through: :source_associatings, source: :source``