POST request uploading to Database but not getting custom response - flask

Question

So as the title suggest, I am able to send a POST request, and see in my postgresql database (through the pgAdmin client) that the data is being submitted and stored, however I run into a number of errors in the response output. It may have to do with the Authorization, as I have never worked with authorizing before. Both errors produce responses with 500 errors, contrary to what I would like.
The POST request is as follows:
def create():
"""
Create Student Function
"""
req_data = request.get_json()
try:
data = student_schema.load(req_data)
except ValidationError as err:
error = err.messages
return custom_response(error, 400)
#check if student exists in db
student_in_db = Student.get_user_by_email(data.get('email'))
if student_in_db:
message = {'error': 'Student already exists, please supply another email address'}
return custom_response(message, 400)
student = Student(data)
student.save()
ser_data = student_schema.dump(student).data
token = Auth.generate_token(ser_data.get('id'))
return custom_response({'jwt_token': token}, 201)
The custom_response is as so:
def custom_response(res, status_code):
"""
Custom Response Function
"""
return Response(
mimetype="application/json",
response=json.dumps(res),
status=status_code
)
Error 1
The new entry is stored, however the response to the server is still a 500 error. The error output is an attribute error pointing towards
ser_data = student_schema.dump(student).data
which is apparently a dict object, thus has no attribute data.
Error 2
Emails are declared unique in my database, thus when trying to create another user with the same email, I get a unique constraint failure, which leads to a 500 response, even though I have the built in function of checking if the student is already in the database.

Answer 1

With flask_sqlalchemy, I expect to see
db.session.add(student)
db.session.commit()
unless you're doing that in
student.save()