[MRG] fix query_abundance column when --ignore-abundance is set (#…

…2251)

* check query_abundance when gather --ignore-abund is set

* check values for flat query

src/sourmash/search.py

@@ -507,6 +507,7 @@ def build_gather_result(self):
             self.f_unique_weighted = self.n_unique_weighted_found / self.total_weighted_hashes
         else:
             self.f_unique_weighted = self.f_unique_to_query
+            self.query_abundance = False
 
     def __post_init__(self):
         self.check_gatherresult_input()

tests/test_sourmash.py

@@ -3151,6 +3151,9 @@ def test_gather_csv(runtmp, linear_gather, prefetch_gather):
         assert row['query_md5'] == 'c9d5a795'
         assert row['query_bp'] == '910'
 
+        assert row['query_abundance'] == 'False'
+        assert row['n_unique_weighted_found'] == ''
+
 
 def test_gather_csv_gz(runtmp, linear_gather, prefetch_gather):
     # test 'gather -o csvfile.gz'
@@ -4718,6 +4721,9 @@ def test_gather_abund_10_1_ignore_abundance(runtmp, linear_gather, prefetch_gath
             assert row['median_abund'] == ''
             assert row['std_abund'] == ''
 
+            assert row['query_abundance'] == 'False', row['query_abundance']
+            assert row['n_unique_weighted_found'] == ''
+
         assert some_results