Add htm skip for SolarSystem associated DiaSources

Modify test to start with 1 indexed ids for DiaObjects.

python/lsst/dax/apdb/apdbSql.py

@@ -775,7 +775,13 @@ def _add_src_htm_index(self, sources: pandas.DataFrame, objs: pandas.DataFrame)
 
         htm_index = np.zeros(sources.shape[0], dtype=np.int64)
         for i, diaObjId in enumerate(sources["diaObjectId"]):
-            htm_index[i] = pixel_id_map[diaObjId]
+            # DiaSources associated with SolarSystemObjects do not have an
+            # associated DiaObject hence we skip them and set their htmIndex
+            # value to 0.
+            if diaObjId == 0:
+                continue
+            else:
+                htm_index[i] = pixel_id_map[diaObjId]
         sources = sources.copy()
         sources[self.config.htm_index_column] = htm_index
         return sources

tests/test_apdbSql.py

@@ -70,8 +70,9 @@ def _makeObjectCatalogPandas(region, count: int, config: ApdbSqlConfig):
     object per pixel range). Coordinates of the created objects are not usable.
     """
     data_list = []
+    # 0 id'ed DiaObjects don't exist and is used as a Null value for the id.
     for oid, sp in enumerate(_makeVectors(region, count)):
-        tmp_dict = {"diaObjectId": oid,
+        tmp_dict = {"diaObjectId": oid + 1,
                     "ra": sp.getRa().asDegrees(),
                     "decl": sp.getDec().asDegrees()}
         data_list.append(tmp_dict)