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-rw-r--r--gn3/db/traits.py39
1 files changed, 22 insertions, 17 deletions
diff --git a/gn3/db/traits.py b/gn3/db/traits.py
index 68b6059..9d5ddd1 100644
--- a/gn3/db/traits.py
+++ b/gn3/db/traits.py
@@ -203,25 +203,30 @@ def delete_sample_data(conn: Any,
                  "AND Strain.Name = \"%s\"") % (trait_name,
                                                 phenotype_id,
                                                 str(strain_name)))
-            strain_id, data_id = cursor.fetchone()
 
-            cursor.execute(("DELETE FROM PublishData "
+            # Check if it exists if the data was already deleted:
+            if _result := cursor.fetchone():
+                strain_id, data_id = _result
+
+            # Only run if the strain_id and data_id exist
+            if strain_id and data_id:
+                cursor.execute(("DELETE FROM PublishData "
                             "WHERE StrainId = %s AND Id = %s")
-                           % (strain_id, data_id))
-            deleted_published_data = cursor.rowcount
-
-            # Delete the PublishSE table
-            cursor.execute(("DELETE FROM PublishSE "
-                            "WHERE StrainId = %s AND DataId = %s") %
-                           (strain_id, data_id))
-            deleted_se_data = cursor.rowcount
-
-            # Delete the NStrain table
-            cursor.execute(("DELETE FROM NStrain "
-                            "WHERE StrainId = %s AND DataId = %s" %
-                            (strain_id, data_id)))
-            deleted_n_strains = cursor.rowcount
-        except Exception as e: #pylint: disable=[C0103, W0612]
+                               % (strain_id, data_id))
+                deleted_published_data = cursor.rowcount
+
+                # Delete the PublishSE table
+                cursor.execute(("DELETE FROM PublishSE "
+                                "WHERE StrainId = %s AND DataId = %s") %
+                               (strain_id, data_id))
+                deleted_se_data = cursor.rowcount
+
+                # Delete the NStrain table
+                cursor.execute(("DELETE FROM NStrain "
+                                "WHERE StrainId = %s AND DataId = %s" %
+                                (strain_id, data_id)))
+                deleted_n_strains = cursor.rowcount
+        except Exception as e:  #pylint: disable=[C0103, W0612]
             conn.rollback()
             raise MySQLdb.Error
         conn.commit()