fix(fastapi): add backref cascade to Package{Keyword,License}

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/models/package_keyword.py

@@ -13,7 +13,8 @@ class PackageKeyword(Base):
         Integer, ForeignKey("PackageBases.ID", ondelete="CASCADE"),
         primary_key=True, nullable=True)
     PackageBase = relationship(
-        _PackageBase, backref=backref("keywords", lazy="dynamic"),
+        _PackageBase, backref=backref("keywords", lazy="dynamic",
+                                      cascade="all, delete"),
         foreign_keys=[PackageBaseID])
 
     Keyword = Column(

aurweb/models/package_license.py

@@ -14,14 +14,16 @@ class PackageLicense(Base):
         Integer, ForeignKey("Packages.ID", ondelete="CASCADE"),
         primary_key=True, nullable=True)
     Package = relationship(
-        _Package, backref=backref("package_license", uselist=False),
+        _Package, backref=backref("package_licenses", lazy="dynamic",
+                                  cascade="all, delete"),
         foreign_keys=[PackageID])
 
     LicenseID = Column(
         Integer, ForeignKey("Licenses.ID", ondelete="CASCADE"),
         primary_key=True, nullable=True)
     License = relationship(
-        _License, backref=backref("package_license", uselist=False),
+        _License, backref=backref("package_licenses", lazy="dynamic",
+                                  cascade="all, delete"),
         foreign_keys=[LicenseID])
 
     __mapper_args__ = {"primary_key": [PackageID, LicenseID]}