108 lines
4.6 KiB
Python
108 lines
4.6 KiB
Python
# app/crud/item.py
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.future import select
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from sqlalchemy import delete as sql_delete, update as sql_update # Use aliases
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from sqlalchemy.exc import SQLAlchemyError, IntegrityError, OperationalError
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from typing import Optional, List as PyList
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from datetime import datetime, timezone
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from app.models import Item as ItemModel
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from app.schemas.item import ItemCreate, ItemUpdate
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from app.core.exceptions import (
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ItemNotFoundError,
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DatabaseConnectionError,
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DatabaseIntegrityError,
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DatabaseQueryError,
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DatabaseTransactionError
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)
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async def create_item(db: AsyncSession, item_in: ItemCreate, list_id: int, user_id: int) -> ItemModel:
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"""Creates a new item record for a specific list."""
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try:
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async with db.begin():
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db_item = ItemModel(
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name=item_in.name,
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quantity=item_in.quantity,
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list_id=list_id,
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added_by_id=user_id,
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is_complete=False # Default on creation
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)
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db.add(db_item)
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await db.flush()
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await db.refresh(db_item)
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return db_item
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except IntegrityError as e:
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raise DatabaseIntegrityError(f"Failed to create item: {str(e)}")
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except OperationalError as e:
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raise DatabaseConnectionError(f"Database connection error: {str(e)}")
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except SQLAlchemyError as e:
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raise DatabaseTransactionError(f"Failed to create item: {str(e)}")
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async def get_items_by_list_id(db: AsyncSession, list_id: int) -> PyList[ItemModel]:
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"""Gets all items belonging to a specific list, ordered by creation time."""
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try:
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async with db.begin():
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result = await db.execute(
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select(ItemModel)
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.where(ItemModel.list_id == list_id)
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.order_by(ItemModel.created_at.asc()) # Or desc() if preferred
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)
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return result.scalars().all()
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except OperationalError as e:
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raise DatabaseConnectionError(f"Failed to connect to database: {str(e)}")
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except SQLAlchemyError as e:
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raise DatabaseQueryError(f"Failed to query items: {str(e)}")
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async def get_item_by_id(db: AsyncSession, item_id: int) -> Optional[ItemModel]:
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"""Gets a single item by its ID."""
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try:
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async with db.begin():
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result = await db.execute(select(ItemModel).where(ItemModel.id == item_id))
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return result.scalars().first()
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except OperationalError as e:
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raise DatabaseConnectionError(f"Failed to connect to database: {str(e)}")
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except SQLAlchemyError as e:
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raise DatabaseQueryError(f"Failed to query item: {str(e)}")
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async def update_item(db: AsyncSession, item_db: ItemModel, item_in: ItemUpdate, user_id: int) -> ItemModel:
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"""Updates an existing item record."""
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try:
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async with db.begin():
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update_data = item_in.model_dump(exclude_unset=True) # Get only provided fields
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# Special handling for is_complete
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if 'is_complete' in update_data:
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if update_data['is_complete'] is True:
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# Mark as complete: set completed_by_id if not already set
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if item_db.completed_by_id is None:
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update_data['completed_by_id'] = user_id
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else:
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# Mark as incomplete: clear completed_by_id
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update_data['completed_by_id'] = None
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# Ensure updated_at is refreshed (handled by onupdate in model, but explicit is fine too)
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# update_data['updated_at'] = datetime.now(timezone.utc)
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for key, value in update_data.items():
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setattr(item_db, key, value)
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db.add(item_db) # Add to session to track changes
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await db.flush()
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await db.refresh(item_db)
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return item_db
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except IntegrityError as e:
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raise DatabaseIntegrityError(f"Failed to update item: {str(e)}")
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except OperationalError as e:
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raise DatabaseConnectionError(f"Database connection error: {str(e)}")
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except SQLAlchemyError as e:
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raise DatabaseTransactionError(f"Failed to update item: {str(e)}")
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async def delete_item(db: AsyncSession, item_db: ItemModel) -> None:
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"""Deletes an item record."""
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try:
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async with db.begin():
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await db.delete(item_db)
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return None # Or return True/False
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except OperationalError as e:
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raise DatabaseConnectionError(f"Database connection error: {str(e)}")
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except SQLAlchemyError as e:
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raise DatabaseTransactionError(f"Failed to delete item: {str(e)}") |