Fix bug where we weren't properly caching enum values and we were always looking up the media type when constructing manifests

data/database.py

@@ -398,6 +398,16 @@ class QuayUserField(ForeignKeyField):
     super(QuayUserField, self).__init__(*args, **kwargs)
 
 
+@lru_cache(maxsize=16)
+def _get_enum_field_values(enum_field):
+  values = []
+  for row in enum_field.rel_model.select():
+    key = getattr(row, enum_field.enum_key_field)
+    value = getattr(row, 'id')
+    values.append((key, value))
+  return Enum(enum_field.rel_model.__name__, values)
+
+
 class EnumField(ForeignKeyField):
   """ Create a cached python Enum from an EnumTable """
   def __init__(self, model, enum_key_field='name', *args, **kwargs):
@@ -409,15 +419,9 @@ class EnumField(ForeignKeyField):
     super(EnumField, self).__init__(model, *args, **kwargs)
 
   @property
-  @lru_cache(maxsize=1)
   def enum(self):
     """ Returns a python enun.Enum generated from the associated EnumTable """
-    values = []
-    for row in self.rel_model.select():
-      key = getattr(row, self.enum_key_field)
-      value = getattr(row, 'id')
-      values.append((key, value))
-    return Enum(self.rel_model.__name__, values)
+    return _get_enum_field_values(self)
 
   def get_id(self, name):
     """ Returns the ForeignKeyId from the name field