Add a CASCADE on delete for annotation_slim.document_id

h/migrations/versions/7418b43b64c3_anno_slim_document_cascade.py

@@ -0,0 +1,36 @@
+"""Add CASCADE on deletion for annotation_slim.document_id."""
+from alembic import op
+
+revision = "7418b43b64c3"
+down_revision = "3081971a50fc"
+
+
+def upgrade():
+    op.drop_constraint(
+        "fk__annotation_slim__document_id__document",
+        "annotation_slim",
+        type_="foreignkey",
+    )
+    op.create_foreign_key(
+        op.f("fk__annotation_slim__document_id__document"),
+        "annotation_slim",
+        "document",
+        ["document_id"],
+        ["id"],
+        ondelete="CASCADE",
+    )
+
+
+def downgrade():
+    op.drop_constraint(
+        op.f("fk__annotation_slim__document_id__document"),
+        "annotation_slim",
+        type_="foreignkey",
+    )
+    op.create_foreign_key(
+        "fk__annotation_slim__document_id__document",
+        "annotation_slim",
+        "document",
+        ["document_id"],
+        ["id"],
+    )

h/models/annotation_slim.py

@@ -69,7 +69,9 @@ class AnnotationSlim(Base):
         server_default=sa.sql.expression.false(),
     )
 
-    document_id = sa.Column(sa.Integer, sa.ForeignKey("document.id"), nullable=False)
+    document_id = sa.Column(
+        sa.Integer, sa.ForeignKey("document.id", ondelete="CASCADE"), nullable=False
+    )
     document = sa.orm.relationship("Document")
 
     user_id = sa.Column(