laibon 0.0.17

Common library for django development

Laibon

Laibon is a collection of useful common classes that can go a long way to help in developing a django based web application.

Features

• Database Access: Abstract adapter pattern for clean separation between business logic and Django models
• Flow Management: Activity-based workflow execution with conditional jumps and error handling
• Container Pattern: Thread-safe key-value storage for passing data between activities
• JSON Validation: Schema-based request validation with caching for performance
• Exception Handling: Comprehensive exception hierarchy for different error scenarios

Installation

From PyPI:

python3 -m pip install laibon

From TestPyPI:

pip install --extra-index-url https://testpypi.python.org/pypi laibon

Quick Examples

Database Adapter Pattern

from laibon.db import Adapter, BaseModel

class UserAdapter(Adapter):
    def __init__(self, entity_id=None, name=None, email=None):
        super().__init__(entity_id)
        self.name = name
        self.email = email
    
    def to_model(self, existing=None):
        if existing:
            existing.name = self.name
            return existing
        return UserModel(name=self.name, email=self.email)

Flow Management

from laibon.rtf import FlowDefinition, FlowRunner

flow = FlowDefinition("User Registration")
flow.add(ValidateInputActivity) \
    .jump_if(ValidationResult.INVALID, ErrorActivity) \
    .jump_default(CreateUserActivity)

runner = FlowRunner(data_container)
runner.run_flow(flow)

JSON Validation

from laibon.rest import JSONSchemaValidator

try:
    JSONSchemaValidator.validate_schema(
        {"name": "John", "age": 30}, 
        "user/create_request.json"
    )
except JSONValidationException:
    # Handle validation error
    pass

Requirements

• Python >= 3.8
• Django >= 4.2
• jsonschema >= 4.0.0