In tables with NULL default values, insert behavior is inconsistent:
If a dictionary-style insert is performed using a dictionary without a key corresponding to the default-null field, the operation proceeds. In the case of a dictionary-style insert where the default-null field is present and set to None, or in the case of a list-style insert with an appropriately given positional None, the operation fails.
However, on the fetch side, records are returned with None as a present and populated value.
>>> print(OtherNull.definition)
otherid: integer
---
otherthing=NULL: varchar(255)
>>> OtherNull().insert1({'otherid': 1})
>>> OtherNull().insert1({'otherid': 2, 'otherthing': None})
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/base_relation.py", line 137, in insert1
self.insert((row,), **kwargs)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/base_relation.py", line 278, in insert
itertools.chain.from_iterable((v for v in r['values'] if v is not None) for r in rows)))
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/connection.py", line 133, in query
cur.execute(query, args)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/pymysql/cursors.py", line 163, in execute
query = self.mogrify(query, args)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/pymysql/cursors.py", line 142, in mogrify
query = query % self._escape_args(args, conn)
TypeError: not enough arguments for format string
>>> OtherNull().insert1((2, None,))
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/base_relation.py", line 137, in insert1
self.insert((row,), **kwargs)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/base_relation.py", line 278, in insert
itertools.chain.from_iterable((v for v in r['values'] if v is not None) for r in rows)))
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/datajoint/connection.py", line 133, in query
cur.execute(query, args)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/pymysql/cursors.py", line 163, in execute
query = self.mogrify(query, args)
File "/Users/chris/Workspace/mlims-pipeline.ve/lib/python3.6/site-packages/pymysql/cursors.py", line 142, in mogrify
query = query % self._escape_args(args, conn)
TypeError: not enough arguments for format string
on the fetch side, None is used as a substitute:
>>> OtherNull()
*otherid otherthing
+---------+ +------------+
1 None
(1 tuples)
>>> OtherNull().fetch()
array([(1, None)], dtype=[('otherid', '<i8'), ('otherthing', 'O')])
>>> OtherNull().fetch1()
OrderedDict([('otherid', 1), ('otherthing', None)])
In tables with
NULLdefault values, insert behavior is inconsistent:If a dictionary-style insert is performed using a dictionary without a key corresponding to the default-null field, the operation proceeds. In the case of a dictionary-style insert where the default-null field is present and set to
None, or in the case of a list-style insert with an appropriately given positionalNone, the operation fails.However, on the fetch side, records are returned with
Noneas a present and populated value.on the fetch side, None is used as a substitute: