78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
from typing import List, Optional, Sequence
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.orm import selectinload
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from app.domain.models import Course, CourseTeacher, Enrollment
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class CoursesRepository:
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def __init__(self, db: AsyncSession):
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self.db = db
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async def get_all(self) -> List[Course]:
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query = (
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select(Course)
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.options(
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selectinload(Course.teachers),
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selectinload(Course.enrollments)
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)
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)
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result = await self.db.execute(query)
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return result.scalars().all()
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async def get_all_for_teacher(self, user_id: int) -> Optional[Sequence[Course]]:
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query = (
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select(Course)
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.options(
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selectinload(Course.teachers),
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selectinload(Course.enrollments)
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)
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.join(Course.teachers)
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.filter(CourseTeacher.teacher_id == user_id)
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)
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result = await self.db.execute(query)
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return result.scalars().all()
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async def get_all_for_enrollment(self, user_id: int) -> Optional[Sequence[Course]]:
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query = (
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select(Course)
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.options(
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selectinload(Course.teachers),
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selectinload(Course.enrollments)
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)
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.join(Course.enrollments)
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.filter(Enrollment.user_id == user_id)
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)
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result = await self.db.execute(query)
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return result.scalars().all()
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async def get_by_id(self, course_id: int) -> Optional[Course]:
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query = (
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select(Course)
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.options(
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selectinload(Course.teachers),
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selectinload(Course.enrollments)
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)
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.filter_by(id=course_id)
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)
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result = await self.db.execute(query)
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return result.scalars().first()
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async def create(self, course: Course) -> Course:
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self.db.add(course)
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await self.db.commit()
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await self.db.refresh(course)
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return course
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async def update(self, course: Course) -> Course:
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await self.db.merge(course)
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await self.db.commit()
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return course
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async def delete(self, course: Course) -> Course:
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await self.db.delete(course)
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await self.db.commit()
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return course
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