Add empty option for taxon rank

Closes #12228 (grafted from efa359afaf8b3f2169f4ba4ffb7866e1e6337b56) --HG-- branch : 6.0
2023-04-19 16:06:51 +02:00
parent cd0a3ed941
commit ac4c087d98
1 changed files with 1 additions and 0 deletions
@@ -20,6 +20,7 @@ class Taxon(classification_tree('product.taxon'), ModelSQL, ModelView):
    'Taxon'
    __name__ = 'product.taxon'
    rank = fields.Selection([
+            (None, ""),
            ('domain', 'Domain'),
            ('kingdom', 'Kingdom'),
            ('phylum', 'Phylum'),