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add filter on relation example

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This commit is contained in:
Jakub Miazek
2022-08-17 14:02:37 +02:00
parent 3e65b7f9a2
commit 04ccd80ad4
5 changed files with 81 additions and 6 deletions
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15
the_app/models/shakespeare.py
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@@ -8,7 +8,9 @@ from sqlalchemy import (
Table,
Text,
UniqueConstraint,
select,
)
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy.orm import relationship
from the_app.models.base import Base
@@ -120,6 +122,13 @@ class Paragraph(Base):
char_count = Column(Integer, nullable=False)
word_count = Column(Integer, nullable=False)
character = relationship("Character", back_populates="paragraph")
chapter = relationship("Chapter", back_populates="paragraph")
work = relationship("Work", back_populates="paragraph")
character = relationship("Character", back_populates="paragraph", lazy="selectin")
chapter = relationship("Chapter", back_populates="paragraph", lazy="selectin")
work = relationship("Work", back_populates="paragraph", lazy="selectin")
@classmethod
async def find(cls, db_session: AsyncSession, character: str):
stmt = select(cls).join(Character).join(Chapter).join(Work).where(Character.name == character)
result = await db_session.execute(stmt)
instance = result.scalars().all()
return instance