Allow deeply nested search quantities.

nomad/metainfo/elastic_extension.py

@@ -153,8 +153,9 @@ class ElasticDocument(SectionAnnotation):
 
         # create an field for each sub section
         for sub_section in section.all_sub_sections.values():
+            sub_sectoin_prefix = '%s.%s' % (prefix, sub_section.name) if prefix else sub_section.name
             inner_document = ElasticDocument.create_document(
-                sub_section.sub_section, inner_doc=True, prefix=sub_section.name)
+                sub_section.sub_section, inner_doc=True, prefix=sub_sectoin_prefix)
             if inner_document is not None:
                 # sub sections with no elastic quantities get a None document
                 attrs[sub_section.name] = Object(inner_document)

nomad/metainfo/search_extension.py

@@ -125,7 +125,6 @@ class Search(Elastic):
         super().init_annotation(definition)
 
     def register(self, prefix, field):
-        # TODO support more deeply nested quantities
         domain_or_all = self.definition.m_parent.m_get_annotations('domain', '__all__')
 
         prefix_and_dot = prefix + '.' if prefix is not None else ''