Adds relationships and CASCADE on deletes

.gitignore

@@ -153,4 +153,5 @@ dmypy.json
 
 ### Default user directories
 export/
+tmp/
 .pfbudget

alembic/versions/287fe9e6682a_add_relationships.py

@@ -0,0 +1,109 @@
+"""Add relationships
+
+Revision ID: 287fe9e6682a
+Revises: d3534f493239
+Create Date: 2022-12-03 16:43:39.633382+00:00
+
+"""
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "287fe9e6682a"
+down_revision = "d3534f493239"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(
+        "fk_categorized_id_originals",
+        "categorized",
+        schema="transactions",
+        type_="foreignkey",
+    )
+    op.create_foreign_key(
+        op.f("fk_categorized_id_originals"),
+        "categorized",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+        ondelete="CASCADE",
+    )
+    op.drop_constraint(
+        "fk_notes_id_originals", "notes", schema="transactions", type_="foreignkey"
+    )
+    op.create_foreign_key(
+        op.f("fk_notes_id_originals"),
+        "notes",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+        ondelete="CASCADE",
+    )
+    op.drop_constraint(
+        "fk_tags_id_originals", "tags", schema="transactions", type_="foreignkey"
+    )
+    op.create_foreign_key(
+        op.f("fk_tags_id_originals"),
+        "tags",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+        ondelete="CASCADE",
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(
+        op.f("fk_tags_id_originals"), "tags", schema="transactions", type_="foreignkey"
+    )
+    op.create_foreign_key(
+        "fk_tags_id_originals",
+        "tags",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+    )
+    op.drop_constraint(
+        op.f("fk_notes_id_originals"),
+        "notes",
+        schema="transactions",
+        type_="foreignkey",
+    )
+    op.create_foreign_key(
+        "fk_notes_id_originals",
+        "notes",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+    )
+    op.drop_constraint(
+        op.f("fk_categorized_id_originals"),
+        "categorized",
+        schema="transactions",
+        type_="foreignkey",
+    )
+    op.create_foreign_key(
+        "fk_categorized_id_originals",
+        "categorized",
+        "originals",
+        ["id"],
+        ["id"],
+        source_schema="transactions",
+        referent_schema="transactions",
+    )
+    # ### end Alembic commands ###

pfbudget/db/model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from sqlalchemy import (
     BigInteger,
     Enum,
@@ -7,7 +9,13 @@ from sqlalchemy import (
     String,
     Text,
 )
-from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, MappedAsDataclass
+from sqlalchemy.orm import (
+    DeclarativeBase,
+    Mapped,
+    mapped_column,
+    MappedAsDataclass,
+    relationship,
+)
 
 from decimal import Decimal
 from typing import Annotated, Optional
@@ -66,16 +74,26 @@ class Original(Base):
     bank: Mapped[bankfk]
     amount: Mapped[money]
 
-
-idfk = Annotated[int, mapped_column(BigInteger, ForeignKey(Original.id))]
+    category: Mapped[Category] = relationship(back_populates="original")
+    note: Mapped[Note] = relationship(back_populates="original")
+    tags: Mapped[set[Tag]] = relationship(
+        back_populates="original", cascade="all, delete-orphan", passive_deletes=True
+    )
 
 
-class Categorized(Base):
+idfk = Annotated[
+    int, mapped_column(BigInteger, ForeignKey(Original.id, ondelete="CASCADE"))
+]
+
+
+class Category(Base):
     __tablename__ = "categorized"
 
     id: Mapped[idfk] = mapped_column(primary_key=True)
     category: Mapped[str]
 
+    original: Mapped[Original] = relationship(back_populates="category")
+
 
 class Note(Base):
     __tablename__ = "notes"
@@ -83,6 +101,8 @@ class Note(Base):
     id: Mapped[idfk] = mapped_column(primary_key=True)
     note: Mapped[str]
 
+    original: Mapped[Original] = relationship(back_populates="note")
+
 
 class Nordigen(Base):
     __tablename__ = "nordigen"
@@ -93,8 +113,10 @@ class Nordigen(Base):
     invert: Mapped[Optional[bool]]
 
 
-class Tags(Base):
+class Tag(Base):
     __tablename__ = "tags"
 
     id: Mapped[idfk] = mapped_column(primary_key=True)
     tag: Mapped[str] = mapped_column(primary_key=True)
+
+    original: Mapped[Original] = relationship(back_populates="tags")