Mapless

Schema-less persistence for Smalltalk with support for multiple backends.

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Features

• Intuitive API for frictionless persistence.
• No need to create and maintain schemas.
• Composable.
• JSON friendly.
• No need to create accessors and mutators.
• Multiple backends to chose from.
• Enables smooth data migration/interoperation among backends.
• Via Redis PUB/SUB, scalable observer-pattern functionality across images.

Ambition

Mapless gives you performant state plasticity and high availability in a scale that goes beyond one Smalltalk image and without backend vendor locking nor object-mapping impedance mismatch.

Supported backends

1. MongoDB
2. Redis
3. Memory
4. PostgreSQL
5. UnQLite

Examples

"Instanciates a mapless object."
genius := DummyPerson new
	firstName: 'Aristotle';
	yourself.

"Saves it."
repository save: genius.	

"Loads one by known ID."
identified := repository findOne: DummyPerson atId: genius id.

"Loads all instances of that class that were stored in that database."
allOrEmpty := repository findAll: DummyPerson.

"Query to load all the instances that match the condition."
someOrEmpty := repository findAll: DummyPerson where: [ :each | each lastName = 'Peterson' ].

"Conditionally loading the first matching instance."
oneOrNil := repository findOne: DummyPerson where: [ :each | each lastName = 'Peterson' ].

Installation

Open a Pharo workspace and evaluate:

Metacello new
	baseline: 'Mapless';
	repository: 'github://sebastianconcept/Mapless:v0.5.0-alpha/src';
	load

Include as dependency

In BaselineOf or ConfigurationOf it can be added in this way:

spec
	baseline: 'Mapless'
	with: [ spec
			repository: 'github://sebastianconcept/Mapless:v0.5.0-alpha/src';
			loads: #('Core' 'Mongo' 'Memory' 'Redis' 'UnQLite') ]