Error when submitting flask-wtf into database
Question:
I am quite new to flask and I ran into a dead-end.
I try to make a reservation form and save it into my database, but something is not working well.
Here is the form:
class ReservationForm(FlaskForm):
checkIn = DateField('Start Date', format='%Y-%m-%d', validators=(validators.DataRequired(),))
checkOut = DateField('End Date', format='%Y-%m-%d', validators=(validators.DataRequired(),))
guestNumber = IntegerField('Number of guests', validators=(validators.InputRequired(),))
numberOfRooms = IntegerField('Number of rooms', validators=(validators.InputRequired(),))
room_type = SelectField(choices=[(r, r) for r in Room.room_type.property.columns[0].type.enums])
amount = FloatField('Total', validators=(validators.InputRequired(),))
paymentType = SelectField(choices=[(p, p) for p in Payment.paymentType.property.columns[0].type.enums])
This is the route:
@auth.route('/reservation', methods=['GET', 'POST'])
def reservation():
form = ReservationForm()
if request.method == 'POST':
checkIn = form.checkIn
checkOut = form.checkOut
guestNumber = form.guestNumber
amount = form.amount
new_reservation = Reservation(checkIn=checkIn, checkOut=checkOut, guestNumber=guestNumber, amount=amount, status = "New")
db.session.add(new_reservation)
db.session.commit()
flash('Reservation created!', category='success')
return redirect(url_for('/'))
return render_template("reservation.html", form=form, user=current_user)
This is the database model:
class Reservation(db.Model):
id = db.Column(db.Integer, primary_key=True)
guestNumber = db.Column(db.Integer, nullable=False)
checkIn = db.Column(db.Date)
checkOut = db.Column(db.Date)
amount = db.Column(db.Integer, nullable=False)
status = db.Column(db.Enum('New', 'Canceled', 'Passed', name='ReservationStatus'), nullable=False)
And finally the HTML code:
{% extends "base.html" %}
{% block title %} Reservation {% endblock %}
{% block content %}
<form method="POST">
<h3 align="center">Make your reservation</h3>
{{ form.hidden_tag() }}
<div class="form-group">
<label for="checkIn">Check-in Date</label>
{{form.checkIn(class_='form-control', type='date')}}
</div>
<div class="form-group">
<label for="checkOut">Check-out Date</label>
{{form.checkOut(class_='form-control')}}
</div>
<div class="form-group">
<label for="numberOfRooms">Number of Rooms</label>
{{form.numberOfRooms(class_='form-control')}}
</div>
<div class="form-group">
<label for="guestNumber">Number of Guests</label>
{{form.guestNumber(class_='form-control')}}
</div>
<div class="form-group">
<label for="amount">Total</label>
{{form.amount(class_='form-control')}}
</div>
<br />
<button type="submit" class="btn btn-primary">Submit</button>
</form>
{% endblock %}
And this is the complete traceback of the error I get on submit:
Error on request:
Traceback (most recent call last):
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1719, in _execute_context
context = constructor(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1070, in _init_compiled
param = [
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1071, in <listcomp>
processors[key](compiled_params[key])
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemydialectssqlitebase.py", line 1068, in process
raise TypeError(
TypeError: SQLite Date type only accepts Python date objects as input.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packageswerkzeugserving.py", line 319, in run_wsgi
execute(self.server.app)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packageswerkzeugserving.py", line 306, in execute
application_iter = app(environ, start_response)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2095, in __call__
return self.wsgi_app(environ, start_response)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2080, in wsgi_app
response = self.handle_exception(e)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2077, in wsgi_app
response = self.full_dispatch_request()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1525, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1523, in full_dispatch_request
rv = self.dispatch_request()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1509, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
File "C:UsersmcraciunDocumentsMariaDisertatieWebAppForHotelManagementwebsiteauth.py", line 111, in reservation
db.session.commit()
File "<string>", line 2, in commit
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 1431, in commit
self._transaction.commit(_to_root=self.future)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 829, in commit
self._prepare_impl()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 808, in _prepare_impl
self.session.flush()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3363, in flush
self._flush(objects)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3502, in _flush
with util.safe_reraise():
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutillanghelpers.py", line 70, in __exit__
compat.raise_(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutilcompat.py", line 207, in raise_
raise exception
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3463, in _flush
flush_context.execute()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormunitofwork.py", line 456, in execute
rec.execute(self)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormunitofwork.py", line 630, in execute
util.preloaded.orm_persistence.save_obj(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormpersistence.py", line 245, in save_obj
_emit_insert_statements(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormpersistence.py", line 1238, in _emit_insert_statements
result = connection._execute_20(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1631, in _execute_20
return meth(self, args_10style, kwargs_10style, execution_options)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemysqlelements.py", line 326, in _execute_on_connection
return connection._execute_clauseelement(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1498, in _execute_clauseelement
ret = self._execute_context(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1725, in _execute_context
self._handle_dbapi_exception(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 2043, in _handle_dbapi_exception
util.raise_(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutilcompat.py", line 207, in raise_
raise exception
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1719, in _execute_context
context = constructor(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1070, in _init_compiled
param = [
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1071, in <listcomp>
processors[key](compiled_params[key])
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemydialectssqlitebase.py", line 1068, in process
raise TypeError(
sqlalchemy.exc.StatementError: (builtins.TypeError) SQLite Date type only accepts Python date objects as input.
[SQL: INSERT INTO reservation ("guestNumber", "checkIn", "checkOut", amount, status, hotel_id) VALUES (?, ?, ?, ?, ?, ?)]
[parameters: [{'status': 'New', 'amount': <wtforms.fields.numeric.FloatField object at 0x0000029F0B3BD510>, 'checkIn': <wtforms.fields.datetime.DateField object at ... (51 characters truncated) ... s.numeric.IntegerField object at 0x0000029F0B3BD2D0>, 'checkOut': <wtforms.fields.datetime.DateField object at 0x0000029F0B3BD210>, 'hotel_id': None}]]
Any help is much appreciated 🙂
Answers:
From your traceback:
TypeError: SQLite Date type only accepts Python date objects as input.
Therefore we can make a conclusion that you are sending a wrong data type to the database, try using datetime object in yoru view instead like:
from datetime import datetime
... your code ...
if request.method == 'POST':
checkIn = datetime.datetime.strptime(
request.form['checkOut'],
'%Y-%m-%d')
checkOut = datetime.datetime.strptime(
request.form['checkOut'],
'%Y-%m-%d')
... your code continues ...
Then it should work.
Thanks to @SLDem’s answer I was able to fix the error I was getting on the date fields, but I also noted that I was getting the values from the form wrongly.
Made this modification in the route and now the code works:
@auth.route('/reservation', methods=['GET', 'POST'])
def reservation():
form = ReservationForm()
if request.method == 'POST':
checkIn = datetime.strptime(
request.form['checkIn'], '%Y-%m-%d')
checkOut = datetime.strptime(
request.form['checkOut'], '%Y-%m-%d')
guestNumber = request.form['guestNumber']
amount = request.form['amount']
I am quite new to flask and I ran into a dead-end.
I try to make a reservation form and save it into my database, but something is not working well.
Here is the form:
class ReservationForm(FlaskForm):
checkIn = DateField('Start Date', format='%Y-%m-%d', validators=(validators.DataRequired(),))
checkOut = DateField('End Date', format='%Y-%m-%d', validators=(validators.DataRequired(),))
guestNumber = IntegerField('Number of guests', validators=(validators.InputRequired(),))
numberOfRooms = IntegerField('Number of rooms', validators=(validators.InputRequired(),))
room_type = SelectField(choices=[(r, r) for r in Room.room_type.property.columns[0].type.enums])
amount = FloatField('Total', validators=(validators.InputRequired(),))
paymentType = SelectField(choices=[(p, p) for p in Payment.paymentType.property.columns[0].type.enums])
This is the route:
@auth.route('/reservation', methods=['GET', 'POST'])
def reservation():
form = ReservationForm()
if request.method == 'POST':
checkIn = form.checkIn
checkOut = form.checkOut
guestNumber = form.guestNumber
amount = form.amount
new_reservation = Reservation(checkIn=checkIn, checkOut=checkOut, guestNumber=guestNumber, amount=amount, status = "New")
db.session.add(new_reservation)
db.session.commit()
flash('Reservation created!', category='success')
return redirect(url_for('/'))
return render_template("reservation.html", form=form, user=current_user)
This is the database model:
class Reservation(db.Model):
id = db.Column(db.Integer, primary_key=True)
guestNumber = db.Column(db.Integer, nullable=False)
checkIn = db.Column(db.Date)
checkOut = db.Column(db.Date)
amount = db.Column(db.Integer, nullable=False)
status = db.Column(db.Enum('New', 'Canceled', 'Passed', name='ReservationStatus'), nullable=False)
And finally the HTML code:
{% extends "base.html" %}
{% block title %} Reservation {% endblock %}
{% block content %}
<form method="POST">
<h3 align="center">Make your reservation</h3>
{{ form.hidden_tag() }}
<div class="form-group">
<label for="checkIn">Check-in Date</label>
{{form.checkIn(class_='form-control', type='date')}}
</div>
<div class="form-group">
<label for="checkOut">Check-out Date</label>
{{form.checkOut(class_='form-control')}}
</div>
<div class="form-group">
<label for="numberOfRooms">Number of Rooms</label>
{{form.numberOfRooms(class_='form-control')}}
</div>
<div class="form-group">
<label for="guestNumber">Number of Guests</label>
{{form.guestNumber(class_='form-control')}}
</div>
<div class="form-group">
<label for="amount">Total</label>
{{form.amount(class_='form-control')}}
</div>
<br />
<button type="submit" class="btn btn-primary">Submit</button>
</form>
{% endblock %}
And this is the complete traceback of the error I get on submit:
Error on request:
Traceback (most recent call last):
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1719, in _execute_context
context = constructor(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1070, in _init_compiled
param = [
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1071, in <listcomp>
processors[key](compiled_params[key])
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemydialectssqlitebase.py", line 1068, in process
raise TypeError(
TypeError: SQLite Date type only accepts Python date objects as input.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packageswerkzeugserving.py", line 319, in run_wsgi
execute(self.server.app)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packageswerkzeugserving.py", line 306, in execute
application_iter = app(environ, start_response)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2095, in __call__
return self.wsgi_app(environ, start_response)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2080, in wsgi_app
response = self.handle_exception(e)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 2077, in wsgi_app
response = self.full_dispatch_request()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1525, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1523, in full_dispatch_request
rv = self.dispatch_request()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagesflaskapp.py", line 1509, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
File "C:UsersmcraciunDocumentsMariaDisertatieWebAppForHotelManagementwebsiteauth.py", line 111, in reservation
db.session.commit()
File "<string>", line 2, in commit
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 1431, in commit
self._transaction.commit(_to_root=self.future)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 829, in commit
self._prepare_impl()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 808, in _prepare_impl
self.session.flush()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3363, in flush
self._flush(objects)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3502, in _flush
with util.safe_reraise():
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutillanghelpers.py", line 70, in __exit__
compat.raise_(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutilcompat.py", line 207, in raise_
raise exception
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormsession.py", line 3463, in _flush
flush_context.execute()
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormunitofwork.py", line 456, in execute
rec.execute(self)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormunitofwork.py", line 630, in execute
util.preloaded.orm_persistence.save_obj(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormpersistence.py", line 245, in save_obj
_emit_insert_statements(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyormpersistence.py", line 1238, in _emit_insert_statements
result = connection._execute_20(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1631, in _execute_20
return meth(self, args_10style, kwargs_10style, execution_options)
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemysqlelements.py", line 326, in _execute_on_connection
return connection._execute_clauseelement(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1498, in _execute_clauseelement
ret = self._execute_context(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1725, in _execute_context
self._handle_dbapi_exception(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 2043, in _handle_dbapi_exception
util.raise_(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyutilcompat.py", line 207, in raise_
raise exception
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginebase.py", line 1719, in _execute_context
context = constructor(
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1070, in _init_compiled
param = [
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemyenginedefault.py", line 1071, in <listcomp>
processors[key](compiled_params[key])
File "C:UsersmcraciunAppDataLocalProgramsPythonPython310libsite-packagessqlalchemydialectssqlitebase.py", line 1068, in process
raise TypeError(
sqlalchemy.exc.StatementError: (builtins.TypeError) SQLite Date type only accepts Python date objects as input.
[SQL: INSERT INTO reservation ("guestNumber", "checkIn", "checkOut", amount, status, hotel_id) VALUES (?, ?, ?, ?, ?, ?)]
[parameters: [{'status': 'New', 'amount': <wtforms.fields.numeric.FloatField object at 0x0000029F0B3BD510>, 'checkIn': <wtforms.fields.datetime.DateField object at ... (51 characters truncated) ... s.numeric.IntegerField object at 0x0000029F0B3BD2D0>, 'checkOut': <wtforms.fields.datetime.DateField object at 0x0000029F0B3BD210>, 'hotel_id': None}]]
Any help is much appreciated 🙂
From your traceback:
TypeError: SQLite Date type only accepts Python date objects as input.
Therefore we can make a conclusion that you are sending a wrong data type to the database, try using datetime object in yoru view instead like:
from datetime import datetime
... your code ...
if request.method == 'POST':
checkIn = datetime.datetime.strptime(
request.form['checkOut'],
'%Y-%m-%d')
checkOut = datetime.datetime.strptime(
request.form['checkOut'],
'%Y-%m-%d')
... your code continues ...
Then it should work.
Thanks to @SLDem’s answer I was able to fix the error I was getting on the date fields, but I also noted that I was getting the values from the form wrongly.
Made this modification in the route and now the code works:
@auth.route('/reservation', methods=['GET', 'POST'])
def reservation():
form = ReservationForm()
if request.method == 'POST':
checkIn = datetime.strptime(
request.form['checkIn'], '%Y-%m-%d')
checkOut = datetime.strptime(
request.form['checkOut'], '%Y-%m-%d')
guestNumber = request.form['guestNumber']
amount = request.form['amount']