Unable to save checkbox data - django

Question

i am really exhausted i didn't find any solution for this till now. I was trying to create a table to view all the data save by the user. The problem is that all the inputs in the models.py are saved excluding the parameters with checkbox. I don't know what is the problem. All these parameters in models.py are saved in the database.
This is my Models.py :
class Parameters(models.Model):
user = models.ForeignKey(User)
title = models.CharField('title', max_length=100, default='', blank=True, help_text='Use an indicative name, related to the chosen parameters')
type = models.CharField('forecast type', choices=FORECAST_TYPES, max_length=20, default="backtest")
#input characteristics
price_1_min = models.FloatField('1. Price, min', default=0.1, validators=[MinValueValidator(0.1), MaxValueValidator(20000)])
price_1_max = models.FloatField('1. Price, max', default=20000, validators=[MinValueValidator(0.1), MaxValueValidator(20000)])
stocks_num_2_min = models.IntegerField('2. Number of selected stock, min', default=3, validators=[MinValueValidator(0), MaxValueValidator(100)])
stocks_num_2_max = models.IntegerField('2. Number of selected stock, max', default=7, validators=[MinValueValidator(1),])
limit_3 = models.FloatField('3. Last price to upper straight, %', default=20, validators=[MinValueValidator(-200),])
learning_days_4_min = models.IntegerField('4. Number of Learning days, min', default=1, validators=[MinValueValidator(1),MaxValueValidator(30)])
learning_days_4_max = models.IntegerField('4. Number of Learning days, max', default=10, validators=[MinValueValidator(1),MaxValueValidator(30)])
evaluation_days_5 = models.IntegerField('5. Number of Evaluation days', default=10, validators=[MinValueValidator(1),MaxValueValidator(10)])
delay_days_6 = models.IntegerField('6. Number of “no quarterly reports” days (N)', default=10, validators=[MinValueValidator(0),MaxValueValidator(20)])
minimum_gain_7 = models.FloatField('7. Minimum gains for winners', default=0, validators=[MinValueValidator(0),MaxValueValidator(100)])
minimum_loss_8 = models.FloatField('8. Minimum losses for losers', default=0, validators=[MinValueValidator(-100),MaxValueValidator(0)])
total_gain_min_9 = models.FloatField('9. Minimum total gain', default=0, validators=[MinValueValidator(0),MaxValueValidator(100)])
winning_stock_percentage_min_10 = models.FloatField('10. Minimum percentage of winning stocks', default=60, validators=[MinValueValidator(0),MaxValueValidator(100)])
#input characteristics
period_start = models.DateField('period, start', default=datetime.date(2013, 9, 25))
period_end = models.DateField('end', default=datetime.datetime.today().date() - datetime.timedelta(days=16))
inital_capital = models.IntegerField('Total initial capital, USD', default=100000, validators=[MinValueValidator(10000),])
fraction_to_invest = models.FloatField('Percentage of the available capital to (re)invest', default=50, validators=[MinValueValidator(10), MaxValueValidator(90)])
minimum_cash = models.IntegerField('Minimum cash to invest, %', default=5, validators=[MinValueValidator(1), MaxValueValidator(50)])
trades_fees = models.FloatField('Trade fees, USD', default=8, validators=[MinValueValidator(0),])
stop_loss = models.FloatField('Stop-Loss, %', default=-2, validators=[MinValueValidator(-50), MaxValueValidator(-1)])
target_gain = models.FloatField('Target gain, %', default=5, validators=[MinValueValidator(1),])
created_at = models.DateTimeField(u'created', auto_now_add=True)
updated_at = models.DateTimeField(u'updated', auto_now=True)
This is the forms.py: All the inputs with multiplechoice field are empty after save
class BacktestForm(forms.ModelForm):
period_start = forms.DateField(initial=datetime.datetime.today().date() - datetime.timedelta(days=365+16), widget=forms.widgets.DateInput(format="%Y/%m/%d"), input_formats=["%Y/%m/%d"])
period_end = forms.DateField(initial=datetime.datetime.today().date() - datetime.timedelta(days=16), widget=forms.widgets.DateInput(format="%Y/%m/%d"), input_formats=["%Y/%m/%d"])
market = forms.MultipleChoiceField(required=False,widget=CheckboxSelectMultiple, choices=MARKET_CHOICES)
sector = forms.MultipleChoiceField(required=False,widget=CheckboxSelectMultiple, choices= MEDIA_CHOICES)
class Meta:
model = Parameters
exclude = [
'user',
'type',
'created_at',
'updated_at',
]
widgets={
'title': forms.TextInput(attrs={'placeholder':'for ex. highLimitLowPrice'}),
}
The function of save in view.py:
def backtest(request, pk=None):
if pk is not None:
param = get_object_or_404(Parameters, pk=pk, user=request.user)
form = BacktestForm(request.POST or None, instance=param)
else:
form = BacktestForm(request.POST or None)
if request.method == 'POST':
if form.is_valid():
if 'save' in request.POST:
obj = form.save(commit= False)
obj.user = request.user
obj.type = "backtest"
obj.save()
messages.info(request, 'Saved!')
return redirect(obj.get_backtest_url())
else:
messages.info(request, 'Please check entered data')
data = {
'active_page': 'backtest',
'form': form,}

Answer 1

In models.py
class Parameters(models.Model):
...
MARKET = (
(1,'First'),
(2,'Second')
)
SECTOR= (
(1,'First'),
(2,'Second')
)
market = models.CharField('Market', max_length=30, null=True)
sector= models.CharField('Sector', max_length=30, null=True)
def display_sector_label(self)
sectors= [(str(dict(self.SECTOR)[value])) for value in self.sector]
return ", ".join(sectors)
def display_market_label(self)
markets = [(str(dict(self.MARKET)[value])) for value in self.market]
return ", ".join(markets)
In forms.py
class BacktestForm(forms.ModelForm):
market = forms.MultipleChoiceField(
label='Market',
choices=Parameters.MARKET,
widget=forms.CheckboxSelectMultiple
)
sector = forms.MultipleChoiceField(
label='Sector',
choices=Parameters.SECTOR,
widget=forms.CheckboxSelectMultiple
)