5bb78bd9be
- Create project structure with FastAPI - Add database models for blocks, transactions, arbitrages, pools, and DEXes - Implement Solana RPC client for fetching blockchain data - Create arbitrage detection algorithm - Implement comprehensive API endpoints for analytics - Set up database migrations with Alembic - Add detailed project documentation generated with BackendIM... (backend.im) Co-Authored-By: Claude <noreply@anthropic.com>
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
|
|
|
|
from fastapi.encoders import jsonable_encoder
|
|
from pydantic import BaseModel
|
|
from sqlalchemy.orm import Session
|
|
|
|
from app.db.base_class import Base
|
|
|
|
ModelType = TypeVar("ModelType", bound=Base)
|
|
CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
|
|
UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
|
|
|
|
|
|
class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
|
|
"""
|
|
Base class for CRUD operations on a SQLAlchemy model
|
|
"""
|
|
|
|
def __init__(self, model: Type[ModelType]):
|
|
"""
|
|
CRUD object with default methods to Create, Read, Update, Delete (CRUD).
|
|
|
|
**Parameters**
|
|
|
|
* `model`: A SQLAlchemy model class
|
|
* `schema`: A Pydantic model (schema) class
|
|
"""
|
|
self.model = model
|
|
|
|
def get(self, db: Session, id: Any) -> Optional[ModelType]:
|
|
"""Get a single record by ID."""
|
|
return db.query(self.model).filter(self.model.id == id).first()
|
|
|
|
def get_multi(
|
|
self, db: Session, *, skip: int = 0, limit: int = 100
|
|
) -> List[ModelType]:
|
|
"""Get multiple records with pagination."""
|
|
return db.query(self.model).offset(skip).limit(limit).all()
|
|
|
|
def get_count(self, db: Session) -> int:
|
|
"""Get total count of records."""
|
|
return db.query(self.model).count()
|
|
|
|
def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
|
|
"""Create a new record."""
|
|
obj_in_data = jsonable_encoder(obj_in)
|
|
db_obj = self.model(**obj_in_data)
|
|
db.add(db_obj)
|
|
db.commit()
|
|
db.refresh(db_obj)
|
|
return db_obj
|
|
|
|
def update(
|
|
self,
|
|
db: Session,
|
|
*,
|
|
db_obj: ModelType,
|
|
obj_in: Union[UpdateSchemaType, Dict[str, Any]]
|
|
) -> ModelType:
|
|
"""Update a record."""
|
|
obj_data = jsonable_encoder(db_obj)
|
|
if isinstance(obj_in, dict):
|
|
update_data = obj_in
|
|
else:
|
|
update_data = obj_in.model_dump(exclude_unset=True)
|
|
for field in obj_data:
|
|
if field in update_data:
|
|
setattr(db_obj, field, update_data[field])
|
|
db.add(db_obj)
|
|
db.commit()
|
|
db.refresh(db_obj)
|
|
return db_obj
|
|
|
|
def remove(self, db: Session, *, id: int) -> ModelType:
|
|
"""Delete a record."""
|
|
obj = db.query(self.model).get(id)
|
|
db.delete(obj)
|
|
db.commit()
|
|
return obj |