66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
from typing import Generic, Type, TypeVar, List, Optional, Any, Dict, Union
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from sqlalchemy.orm import Session
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from app.models.base import Base
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# Type variable bound to SQLAlchemy Declarative Base
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ModelType = TypeVar("ModelType", bound=Base)
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class BaseRepository(Generic[ModelType]):
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"""
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Generic Base Repository containing common CRUD database operations.
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Designed to reduce boilerplate code across all entities.
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"""
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def __init__(self, model: Type[ModelType]):
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self.model = model
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def get(self, db: Session, id: Any) -> Optional[ModelType]:
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"""Fetch a single record by its primary key ID."""
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return db.query(self.model).filter(self.model.id == id).first()
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def get_all(self, db: Session, skip: int = 0, limit: int = 100) -> List[ModelType]:
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"""Fetch a list of records with optional pagination limits."""
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return db.query(self.model).offset(skip).limit(limit).all()
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def create(self, db: Session, obj_in: Any) -> ModelType:
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"""Create a new database record from a dictionary or Pydantic model."""
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if hasattr(obj_in, "model_dump"):
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obj_data = obj_in.model_dump()
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elif hasattr(obj_in, "dict"):
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obj_data = obj_in.dict()
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else:
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obj_data = dict(obj_in)
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db_obj = self.model(**obj_data)
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db.add(db_obj)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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def update(self, db: Session, db_obj: ModelType, obj_in: Union[Any, Dict[str, Any]]) -> ModelType:
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"""Update an existing database record with new field values."""
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if isinstance(obj_in, dict):
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update_data = obj_in
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elif hasattr(obj_in, "model_dump"):
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update_data = obj_in.model_dump(exclude_unset=True)
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elif hasattr(obj_in, "dict"):
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update_data = obj_in.dict(exclude_unset=True)
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else:
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update_data = dict(obj_in)
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for field in update_data:
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if hasattr(db_obj, field):
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setattr(db_obj, field, update_data[field])
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db.add(db_obj)
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db.commit()
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db.refresh(db_obj)
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return db_obj
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def delete(self, db: Session, id: Any) -> Optional[ModelType]:
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"""Delete a record by its primary key ID."""
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db_obj = db.query(self.model).filter(self.model.id == id).first()
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if db_obj:
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db.delete(db_obj)
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db.commit()
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return db_obj
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