Typeerror: expected string or bytes-like Object Datefield

Question

I am having a very boring problem in Django to work with date. I am sending from my angular a date I select in a input data. In my view, i turn the date to that format: 2017-10-13

When I try to update my Datefield field, I get the error:

TypeError: expected string or bytes-like object

Field in the Model:

data_resgate = models.DateField('Data Resgate', null=True, blank=True)

How I’m doing the update:

model.data_resgate = str(datetime.datetime.strptime(data.get('data_resgate', None), "%Y-%m-%dT%H:%M:%S.000Z").date())

I’m with USE_L10N = True.

@UPDATE

The worst is, when I give one python manage.py shell to update manually, when I add the string 2017-10-13, it saves correctly without giving error.

@UPDATE2

When I just pick up the date received from input date, and try to generate a date with the datetime, it doesn’t even convert because I receive the input date otherwise.

File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/_strptime.py", line 565, in _strptime_datetime
    tt, fraction = _strptime(data_string, format)
  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/_strptime.py", line 365, in _strptime
    data_string[found.end():])
ValueError: unconverted data remains: T00:00:00.000Z

Answer 1

As it became a little difficult to know at what point you are receiving this error, I try to help you reproduce the same scenario (successfully) with a model called Test, as follows:

data = {'data_resgate': '2017-10-10'}
teste = Teste()
teste.data_resgate = datetime.datetime.strptime(data.get('data_resgate', None), "%Y-%m-%d").date()
teste.save()

Note that I only used the format %Y-%m-%d. Since the field is date only, I understand that it is not necessary to work with additional information related to hours and minutes or to worry about Time Zone. You don’t even need to cast a cast for str, since the field is a Datefield. Make sure, moreover, that data.get('data_rescue', None) returns a str because, if it returns another type of data or up to None (which was defined as default in case of absence of this key), the function strptime will also return an error.

If the error remains, post a more detailed stacktrace so that we can better identify the time and place where this error is occurring. I hope I’ve helped!