fix: Add unique key to combination of registry_id and group_id

src/ai/backend/manager/models/__init__.py

@@ -1,5 +1,6 @@
 from . import acl as _acl
 from . import agent as _agent
+from . import association_container_registries_groups as _association_container_registries_groups
 from . import container_registry as _container_registry
 from . import domain as _domain
 from . import dotfile as _dotfile
@@ -30,6 +31,7 @@
     "metadata",
     *_acl.__all__,
     *_agent.__all__,
+    *_association_container_registries_groups.__all__,
     *_container_registry.__all__,
     *_domain.__all__,
     *_endpoint.__all__,
@@ -58,6 +60,7 @@
 
 from .acl import *  # noqa
 from .agent import *  # noqa
+from .association_container_registries_groups import *  # noqa
 from .container_registry import *  # noqa
 from .domain import *  # noqa
 from .dotfile import *  # noqa

src/ai/backend/manager/models/alembic/versions/8f85e9d0bd4e_add_association_containerregistries_.py

@@ -32,6 +32,7 @@ def upgrade() -> None:
             GUID,
             nullable=False,
         ),
+        sa.UniqueConstraint("registry_id", "group_id", name="uq_registry_id_group_id"),
     )
 
 

src/ai/backend/manager/models/association_container_registries_groups.py

@@ -17,6 +17,11 @@
 
 class AssociationContainerRegistriesGroupsRow(Base):
     __tablename__ = "association_container_registries_groups"
+    __table_args__ = (
+        # constraint
+        sa.UniqueConstraint("registry_id", "group_id", name="uq_registry_id_group_id"),
+    )
+
     id = IDColumn()
     registry_id = sa.Column(
         "registry_id",