65 lines
1.8 KiB
Python
65 lines
1.8 KiB
Python
from typing import Optional
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select
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from sqlalchemy.orm import aliased
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from db.models import Category
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class CategoriesRepository:
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async def get_category_by_id(
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self, session: AsyncSession, category_id: int
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) -> Optional[Category]:
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stmt = select(Category).where(Category.id == category_id)
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return await session.scalar(stmt)
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async def get_categories_by_parent_id(
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self, session: AsyncSession, parent_id: Optional[int] = None
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) -> list[Category]:
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stmt = select(Category).where(Category.parent_id == parent_id)
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result = await session.scalars(stmt)
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return list(result)
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async def get_category_path(self, session: AsyncSession, category_id: int):
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base = select(Category.id, Category.parent_id, Category.name).where(
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Category.id == category_id
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)
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cte = base.cte(name="path", recursive=True)
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parent = aliased(Category)
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cte = cte.union_all(
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select(parent.id, parent.parent_id, parent.name).join(
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cte, cte.c.parent_id == parent.id
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)
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)
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stmt = select(cte)
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result = await session.execute(stmt)
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rows = result.all()
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return list(reversed(rows))
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async def add_category(
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self, session: AsyncSession, *, name: str, parent_id: Optional[int]
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) -> Category:
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category = Category(name=name, parent_id=parent_id)
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session.add(category)
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await session.commit()
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return category
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async def update_category_name(
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self, session: AsyncSession, category_id: int, value: str
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):
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category = await self.get_category_by_id(session, category_id)
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category.name = value
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await session.commit()
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return category
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