fix: modify the code logic to check for the existence of min/max in `…

…resource_limits`. (#1941)

changes/1941.fix.md

@@ -0,0 +1 @@
+To update image metadata, check if the min/max values in `resource_limits` are undefined.

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

@@ -23,6 +23,7 @@
 import graphene
 import sqlalchemy as sa
 import trafaret as t
+from graphql import Undefined
 from redis.asyncio import Redis
 from redis.asyncio.client import Pipeline
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -998,9 +999,9 @@ async def mutate(
             resources_data = {}
             for limit_option in props.resource_limits:
                 limit_data = {}
-                if limit_option.min is not None and len(limit_option.min) > 0:
+                if limit_option.min is not Undefined and len(limit_option.min) > 0:
                     limit_data["min"] = limit_option.min
-                if limit_option.max is not None and len(limit_option.max) > 0:
+                if limit_option.max is not Undefined and len(limit_option.max) > 0:
                     limit_data["max"] = limit_option.max
                 resources_data[limit_option.key] = limit_data
             data["resources"] = resources_data