DataQ - Object-Relational Mapping for Rails

DataQ connects classes to relational database tables(SQL3) to establish a persistence layer for applications. By providing a DataQObject class as a base class, DataQ can provide mapping between classes and an existing table in the database. Such classes are referred to as "Models", which can also be connected through associations

Features of DataQ are dependent on naming as it relies on class and assocition names to create mappings between database and models.

Instructions for use:

After downloading, run

bundle install

to install required gems such as pry

In pry run

pry(main) > load 'lib/dataq_object.rb'

A cats.sql file is provided for a default database. To set up the database manually run in command line:

cat cats.sql | sqlite3 cats.db

Current Classes in the database:

Cat
Human
House

Methods:

Class.all - Returns all objects in the database of Class
Class.first - Returns first object in the database of Class
Class.columns - Returns current columns in database of Class
```
Cat.columns 

=>[:id, :name, :owner_id]
```

Class.where(params) - Returns filtered results based on params of Class

Cat.where(:id => 1)

=> Cat @attributes={:id=>1, :name=>"Breakfast", :owner_id=>1}

Specific Associations

class Cat < DataQObject
  belongs_to :human, foreign_key: :owner_id
  has_one_through :home, :human, :house
end

class Human < DataQObject
  has_many :cats, foreign_key: :owner_id
  belongs_to :house
end 

class House < DataQObject
  has_many :humans
end

Cat

Cat.first.human
Cat.first.home

Human

Human.first.cats
Human.first.house

House

House.first.humans

jefang123 / dataQ