django form failed to get values from request - django

Question

this is views.py
def registerItem(request):
print(request)
try:
print("====111", request.method)
if request.method == 'POST':
print("=========222", request.POST)
form = ItemForm(request.POST)
print("====333", form.is_bound)
print("====444", form)
print("====555", form.cleaned_data['mart_id']())
print("====666", form.is_valid())
if form.is_valid():
mart = MartModel.objects.get(id__exact=form.cleaned_data['mart_id'])
print("====666", mart)
seq = ItemModel.objects.filter(mart_id__exact=mart).values('seq').order_by('-seq')[:1]
if seq:
seq = seq[0]['seq']+1
else:
seq = 1
# form.save()
item = ItemModel(mart_id=mart, seq=seq, name=form.cleaned_data['name'], price=form.cleaned_data['price'], expirationDate=form.cleaned_data['expirationDate'], stockYn=form.cleaned_data['stockYn'])
item.save()
form = ItemForm()
return render(request, 'mobileWeb/admin/register_item.html', {'form':form})
else:
form = ItemForm()
return render(request, 'mobileWeb/admin/register_item.html', {'form':form})
except Exception as ex:
print('====777 : Error occured : ', ex)
request.POST value is correct. you can confirm it by log No.2.
form is bound correctly. you can confirm it by log No.3.
but the form failed to receive values. you can confirm it by log No.4.
this is forms.py
class MartForm(forms.ModelForm):
class Meta:
model = MartModel
fields = ['name', 'address', 'tell', 'phone', 'xPosition', 'yPosition']
class ItemForm(forms.ModelForm):
choicesQueryset = MartModel.objects.all().values('id', 'name')
choicesDic = []
for choice in choicesQueryset:
choicesDic.append((choice['id'], choice['name']))
mart_id = forms.CharField(label='mart', widget=forms.Select(choices=choicesDic))
class Meta:
model = ItemModel
fields = ['mart_id', 'name', 'price', 'expirationDate', 'stockYn']
this is models.py
class MartModel(models.Model):
name = models.CharField(max_length=20, blank=False)
address = models.TextField(blank=False)
tell = models.CharField(blank=True, max_length=12)
phone = models.CharField(blank=True, max_length=11)
imageFileNo = models.CharField(blank=True, max_length=3)
xPosition = models.FloatField(blank=False)
yPosition = models.FloatField(blank=False)
delete_yn = models.CharField(blank=False, default="N", max_length=1)
ins_dttm = models.DateTimeField(blank=False, auto_now_add=True)
ins_user = models.CharField(blank=False, max_length=20, default='ADMIN')
upt_dttm = models.DateTimeField(blank=False, auto_now=True)
upt_user = models.CharField(blank=False, max_length=20, default='ADMIN')
class ItemModel(models.Model):
mart_id = models.ForeignKey('martModel', models.DO_NOTHING)
seq = models.IntegerField(blank=False)
name = models.CharField(blank=False, max_length=20)
price = models.IntegerField(blank=False)
expirationDate = models.DateField(blank=False)
stockYn = models.CharField(blank=False, max_length=1, default='Y')
delete_yn = models.CharField(blank=False, default="N", max_length=1)
ins_dttm = models.DateTimeField(blank=False, auto_now_add=True)
ins_user = models.CharField(blank=False, max_length=20, default='ADMIN')
upt_dttm = models.DateTimeField(blank=False, auto_now=True)
upt_user = models.CharField(blank=False, max_length=20, default='ADMIN')
class Meta:
unique_together = (
('mart_id', 'seq')
)
I know about that it must be a instance not a value when deal with the foreignKey.
but the error occured on binding time.
is this concerend with foreignKey??
================
after advice
no mart name is here.
this is forms.py
class ItemForm(forms.ModelForm):
mart = forms.ModelChoiceField(queryset=MartModel.objects.all(), to_field_name='name')
class Meta:
model = ItemModel
fields = ['mart', 'name', 'price', 'expirationDate', 'stockYn']
this is views.py
from django.shortcuts import render
from .forms import *
# Create your views here.
def index(request):
try:
marts = MartModel.objects.all().values('id', 'name', 'imageFileNo', 'xPosition', 'yPosition')
items = ItemModel.objects.filter(stockYn__exact='Y').values('mart', 'name', 'price', 'expirationDate').order_by('mart_id', 'seq')
return render(request, 'mobileWeb/index/index.html', {'marts':marts, 'items':items})
except Exception as ex:
print('Error occured : ', ex)
def registerMart(request):
try:
if request.method == 'POST' :
form = MartForm(request.POST)
if form.is_valid():
form.save()
return render(request, 'mobileWeb/index/index.html')
else :
form = MartForm()
return render(request, 'mobileWeb/admin/register_mart.html', {'form':form})
except Exception as ex:
print('Error occured : ', ex)
def registerItem(request):
print(request)
try:
print("====111", request.method)
if request.method == 'POST':
print("=========222", request.POST)
form = ItemForm(request.POST)
print("====333", form.is_bound)
print("====444", form)
if form.is_valid():
mart = MartModel.objects.get(id__exact=form.cleaned_data['mart'])
print("====666", mart)
seq = ItemModel.objects.filter(mart__exact=mart).values('seq').order_by('-seq')[:1]
if seq:
seq = seq[0]['seq']+1
else:
seq = 1
# form.save()
item = ItemModel(mart=mart, seq=seq, name=form.cleaned_data['name'], price=form.cleaned_data['price'], expirationDate=form.cleaned_data['expirationDate'], stockYn=form.cleaned_data['stockYn'])
item.save()
form = ItemForm()
return render(request, 'mobileWeb/admin/register_item.html', {'form':form})
else:
form = ItemForm()
return render(request, 'mobileWeb/admin/register_item.html', {'form':form})
except Exception as ex:
print('====777 : Error occured : ', ex)
this is debug variable when make Item Form
this is debug variable about queryset
this is debug variable about 1st member of queryset
ofcourse I did makemigrations, migrate.

Answer 1

I don't know why are you trying to approach like this. ModelForm has very nice way to handle FK, and if you want to show name of the MartModel object, then you can use ModelChoiceField's to_field_name option. For example:
class ItemForm(forms.ModelForm):
mart_id = forms.ModelChoiceField(queryset=MartModel.objects.all(), to_field_name='name')
class Meta:
model = ItemModel
fields = ['mart_id', 'name', 'price', 'expirationDate', 'stockYn']
Also, please change the name of the field mart_id to mart, because underneath django creates a field name mart_id, if you assign the field name to mart.
Finally, in the view, you should not call cleaned_data[...] before calling form.is_valid(). Unless the form is validated, the data won't be available in cleaned_data.
Update
(from comments) Add a __str__ method at the bottom of MartModel class:
class MartModel(models.Model):
...
def __str__(self):
return self.name