Implement Shahim's suggestion to write a "NULL" for empty enums.

See #85.
cancerDHC · Oct 5, 2021 · 7ae64a3 · 7ae64a3
1 parent 47cde88
commit 7ae64a3
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/vendor/sheet2linkml/sheet2linkml/source/gsheetmodel/enum.py b/vendor/sheet2linkml/sheet2linkml/source/gsheetmodel/enum.py
@@ -209,11 +209,22 @@ def as_linkml(self, root_uri) -> EnumDefinition:
         self.mappings.set_mappings_on_element(enum)
 
         # Now generate LinkML for all of the values.
-        enum.permissible_values = {
+        pv_values = {
             str(enum_value.name): enum_value.as_linkml(root_uri)
             for enum_value in self.values
         }
 
+        # If we have no permissible values, then define a single PV named "null"
+        # (see https://github.com/cancerDHC/ccdhmodel/issues/85 for details)
+        if len(pv_values) == 0:
+            pv_values = {
+                'NULL': PermissibleValue(
+                    text='NULL'
+                )
+            }
+
+        enum.permissible_values = pv_values
+
         return enum