diff options
| -rw-r--r-- | wqflask/base/data_set.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/wqflask/base/data_set.py b/wqflask/base/data_set.py index 4d708e59..6c6deea9 100644 --- a/wqflask/base/data_set.py +++ b/wqflask/base/data_set.py @@ -749,8 +749,12 @@ class DataSet: (self.group.species,) ) results = dict(cursor.fetchall()) - sample_ids = [results.get(item) - for item in self.samplelist if item is not None] + sample_ids = [ + sample_id for sample_id in + (results.get(item) for item in self.samplelist + if item is not None) + if sample_id is not None + ] # MySQL limits the number of tables that can be used in a join to 61, # so we break the sample ids into smaller chunks |