Easily add soft-deletion to your SQLAlchemy Models.
Project description
SQLAlchemy Easy Soft-Delete
Easily add soft-deletion to your SQLAlchemy Models and automatically filter out soft-deleted objects from your queries and relationships.
This package can generate a tailor-made SQLAlchemy Mixin that can be added to your SQLAlchemy Models, making them contain a field that, when set, will mark the entity as being soft-deleted.
The library also installs a hook which dynamically rewrites all selects which are sent to the database for all tables that implement the soft-delete mixin, providing a seamless experience in both manual queries and model relationship accesses.
Mixin generation is fully customizable and you can choose the field name, its type, and the presence of (soft-)delete/undelete methods.
The default implementation will generate a deleted_at
field in your models, of type DateTime(timezone=True)
, and will also provide a .delete(v: Optional = datetime.utcnow())
and .undelete()
methods.
Installation:
pip install sqlalchemy-easy-softdelete
How to use:
from sqlalchemy_easy_softdelete.mixin import generate_soft_delete_mixin_class
from sqlalchemy.orm import declarative_base
from sqlalchemy import Column, Integer
from datetime import datetime
# Create a Class that inherits from our class builder
class SoftDeleteMixin(generate_soft_delete_mixin_class()):
# type hint for autocomplete IDE support
deleted_at: datetime
# Apply the mixin to your Models
Base = declarative_base()
class Fruit(Base, SoftDeleteMixin):
__tablename__ = "fruit"
id = Column(Integer)
Example Usage:
all_active_fruits = session.query(Fruit).all()
This will generate a query with an automatic WHERE fruit.deleted_at IS NULL
condition added to it.
all_fruits = session.query(Fruit).execution_options(include_deleted=True).all()
Setting include_deleted=True
(attribute name can be customized) in the query disables soft delete for that query.
License
- BSD-3-Clause
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