pon.cr

Maiha's private ORM for Crystal.

• crystal: 0.27.0

Usage

require "pon"
require "pon/adapter/mysql"

class Job < Pon::Model
  adapter mysql
  field   name : String
  field   time : Time::Span
end

Pon::Adapter::Mysql.setting.url = "mysql://root@127.0.0.1:3306/test"
Job.migrate! # drop and create the table

Job.count # => 0

job = Job.new(name: "foo")
job.name  # => "foo"
job.time? # => nil

job.save  # => true

API : Adapter

  def exec(sql) : Nil
  def lastval : Int64
  def scalar(*args)
  def reset! : Nil

  # CRUD
  def insert(fields, params)
  def all(fields : Array(String), as types : Tuple, where = nil, limit = nil)
  def one?(id, fields : Array(String), as types : Tuple)
  def count : Int32
  def delete(key) : Bool
  def delete : Nil
  def truncate : Nil

  # ODBC
  def databases : Array(String)
  def tables : Array(String)

  # Experimental
  def transaction(&block) : Nil # only sqlite and pg

API : Model

class Pon::Model
  # Databases
  def self.adapter : Adapter(A)
  def self.migrator : Migrator
  def self.migrate! : Nil

  # Core
  def self.table_name : String
  def new_record? : Bool
  def to_h : Hash(String, ALL_TYPES)

  # CRUD
  def self.create! : M
  def self.create : M
  def self.count : Int32
  def self.all : Array(M)
  def self.where(condition : String) : Array(M)
  def self.first : M
  def self.first? : M?
  def save : Bool
  def save! : Bool
  def self.delete_all
  def delete

  # Field "foo"
  def foo : T
  def foo? : T?

API : Module

Pon.logger=(v : Logger)      # logger
Pon.query_logging=(v : Bool) # writes queries into the logger or not

Roadmap

• Adapter Core
  • [x] connect lazily
  • [x] exec plain sql
  • [x] exec prepared statement
  • [x] count
  • [x] scalar
  • [x] quote
  • [ ] escape
  • [x] migrator
• Adapter Drivers
  • [x] reset connections
  • RDB
    • [x] mysql
    • [x] pg
    • [x] sqlite
  • KVS
    • [ ] redis
• Core
  • [x] pluralize table names
  • [ ] custom type
  • [x] multibytes
  • [x] record status
  • [x] inspect class and records
  • [ ] callbacks
  • [ ] validations
  • [x] natural keys
• CRUD
  • [x] all, count, first
  • [x] create
  • [x] delete, delete_all
  • [x] find
  • [x] save
• Relations
  • [ ] belongs_to
  • [ ] has_many
  • [ ] has_many through
• Misc
  • [ ] bulk insert
  • [ ] upsert

Installation

Add this to your application's shard.yml:

dependencies:
  pon:
    github: maiha/pon.cr
    version: 0.3.1

  # one of following adapter
  mysql:
    github: crystal-lang/crystal-mysql
    version: ~> 0.4.0
  sqlite3:
    github: crystal-lang/crystal-sqlite3
    version: ~> 0.9.0
  pg:
    github: will/crystal-pg
    version: ~> 0.14.1

Development

TODO: Write development instructions here

Contributing

1. Fork it ( https://github.com/maiha/pon.cr/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• maiha maiha - creator, maintainer

Thanks / Inspiration

• crecto
• AciveRecord
• active_record.cr