Python: werkzeug.exceptions.InternalServerError: 500 Internal Server Error: 'NoneType' object...

I've seen many solutions about this problem but any of them solved mine.

I've this INSERT query which is wrapped in a try/except and, although it works fine in the database (the data is properly inserted), a Traceback is called, the code jumps to the except and the code below the query execution is just ignored (which cannnot happen in my case).

It is something like this:

query = """
INSERT INTO
mytable(user_id, tcx_extension, user_email, created_date)
VALUES
{}
""".format("('12345678910', '6666', 'test123@test.com', '2020/01/06 00:00:00')")

self.pgsql.execute_query(query) // the error is triggered here

//important code below that is ignored when the error fires


the self.pgsql.execute_query function is shown below:

def execute_query(self, query, retry=0, format=True):
if self.pool is None:
self._open_pool(PGSQL["connection_string"])

try:
conn = self.pool.getconn()

cur = conn.cursor()
conn.autocommit = True

LOG.info("Executing query", extra={"query": query})
cur.execute(query)

if format is True:
data = Formatter.format_cursor(cur)
else:
data = None
self.pool.putconn(conn)
cur.close()

except pool.PoolError as e:
LOG.error("PoolError: {}".format(e), extra={"query": query})
if retry > MAX_RETRIES:
raise TooManyRetries("Too many retries: {}".format(e))

LOG.info("Will retry: {}".format(e), extra={"query": query})
time.sleep(1)
return self.execute_query(query, retry + 1)

return data


The Traceback is shown below:

[2021-01-06 15:28:15,421] ERROR in app: Exception on /members/manage_socket_members [POST]
Traceback (most recent call last):
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\flask_restful\__init__.py", line 480, in wrapper
resp = resource(*args, **kwargs)
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\views.py", line 84, in view
return self.dispatch_request(*args, **kwargs)
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\flask_restful\__init__.py", line 595, in dispatch_request
resp = meth(*args, **kwargs)
File "C:\Users\artur.santos\Documents\#salesforce\rc-analytics-api\src\decorators\auth.py", line 70, in wrap
return f(*args, **kwargs)
File "C:\Users\artur.santos\Documents\#salesforce\rc-analytics-api\src\members\manage_socket_members.py", line 30, in post
return abort(500, error)
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\werkzeug\exceptions.py", line 707, in abort
return _aborter(status, *args, **kwargs)
File "C:\Users\artur.santos\AppData\Local\Programs\Python\Python37\lib\site-packages\werkzeug\exceptions.py", line 687, in __call__
raise self.mapping

Código:

(*args, **kwargs)
werkzeug.exceptions.InternalServerError: 500 Internal Server Error: 'NoneType' object is not iterable


Any ideas on how to solve this?

EDIT 1: All the table fields are of type 'VARCHAR' except for the created_date.

EDIT 2: When I try to insert some values between double quotes the error changes (which is also a nonsense error for me). I don't know if gets me closer to the solution. Check it out the logs I printed

> query: INSERT INTO wfm.socket_user_relation (user_id, tcx_extension, user_email, created_date) VALUES (12345678937, 63, "test37@test.com.br", "2021/01/07 09:25:35")
> exception: column "test37@test.com.br" does not exist
LINE 1: ...ser_email, created_date) VALUES (12345678937, 63, "test37@te...
                                                             ^


EDIT 3: If I try to INSERT all of them double quoted, the error remains the same: Error: 500 Internal Server Error: 'NoneType' object is not iterable

[url="https://stackoverflow.com/questions/65601804/python-werkzeug-exceptions-internalservererror-500-internal-server-error-non"]Continue reading...[/url]