127 lines
3.4 KiB
Python
127 lines
3.4 KiB
Python
from typing import List, Optional
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from uuid import UUID
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from sqlalchemy.orm import Session
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from sqlalchemy.exc import IntegrityError
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from datetime import datetime
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from models.fruit import Fruit
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from schemas.fruit import FruitCreate, FruitUpdate
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def get_all_fruits(db: Session) -> List[Fruit]:
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"""
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Retrieves all fruits from the database.
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Args:
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db (Session): The database session.
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Returns:
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List[Fruit]: A list of all fruit objects.
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"""
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return db.query(Fruit).all()
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def get_fruit_by_id(db: Session, fruit_id: UUID) -> Optional[Fruit]:
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"""
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Retrieves a single fruit by its ID.
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Args:
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db (Session): The database session.
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fruit_id (UUID): The ID of the fruit to retrieve.
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Returns:
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Optional[Fruit]: The fruit object if found, otherwise None.
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"""
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return db.query(Fruit).filter(Fruit.id == fruit_id).first()
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def get_fruit_by_name(db: Session, name: str) -> Optional[Fruit]:
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"""
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Retrieves a single fruit by its name.
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Args:
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db (Session): The database session.
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name (str): The name of the fruit to retrieve.
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Returns:
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Optional[Fruit]: The fruit object if found, otherwise None.
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"""
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return db.query(Fruit).filter(Fruit.name == name).first()
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def get_all_fruit_names(db: Session) -> List[str]:
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"""
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Retrieves a list of all fruit names.
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Args:
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db (Session): The database session.
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Returns:
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List[str]: A list of fruit names.
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"""
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fruits = db.query(Fruit.name).all()
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return [fruit[0] for fruit in fruits]
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def create_fruit(db: Session, fruit_data: FruitCreate) -> Optional[Fruit]:
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"""
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Creates a new fruit in the database.
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Args:
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db (Session): The database session.
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fruit_data (FruitCreate): The data for the fruit to create.
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Returns:
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Optional[Fruit]: The newly created fruit object, or None if creation fails.
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"""
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try:
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db_fruit = Fruit(**fruit_data.dict())
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db.add(db_fruit)
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db.commit()
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db.refresh(db_fruit)
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return db_fruit
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except IntegrityError:
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db.rollback()
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return None
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def update_fruit(db: Session, fruit_id: UUID, fruit_data: FruitUpdate) -> Optional[Fruit]:
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"""
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Updates an existing fruit in the database.
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Args:
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db (Session): The database session.
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fruit_id (UUID): The ID of the fruit to update.
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fruit_data (FruitUpdate): The update data for the fruit.
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Returns:
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Optional[Fruit]: The updated fruit object if found and updated, otherwise None.
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"""
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db_fruit = get_fruit_by_id(db, fruit_id)
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if not db_fruit:
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return None
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try:
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update_data = fruit_data.dict(exclude_unset=True)
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for key, value in update_data.items():
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setattr(db_fruit, key, value)
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db_fruit.updated_at = datetime.utcnow()
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db.commit()
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db.refresh(db_fruit)
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return db_fruit
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except IntegrityError:
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db.rollback()
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return None
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def delete_fruit(db: Session, fruit_id: UUID) -> bool:
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"""
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Deletes a fruit from the database.
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Args:
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db (Session): The database session.
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fruit_id (UUID): The ID of the fruit to delete.
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Returns:
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bool: True if the fruit was deleted, False if not found.
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"""
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db_fruit = get_fruit_by_id(db, fruit_id)
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if not db_fruit:
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return False
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db.delete(db_fruit)
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db.commit()
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return True |