POST request done successfully but data not saved in database - django

Question

I'm trying to save form data in database by POST request, request successfully done but data not saved in database.
models.py
class Image(models.Model):
user = models.ForeignKey(User, related_name='images')
tagName = models.CharField(max_length=255)
instance = models.CharField(max_length=255)
forms.py
class BuildImageForm(forms.ModelForm):
class Meta:
fields = ('user', 'tagName', 'instance')
model = Image
views.py
class BuildImage(LoginRequiredMixin, CreateView):
form_class = BuildImageForm
model = Image
template_name = 'images/buildImage.html'
success_url = 'user/gui'
def get(self, request, *args, **kwargs):
objectlist = request.user.instances.all()
return render(request, 'images/buildImage.html', {'form': forms.BuildImageForm,
'objectlist': objectlist})
def form_valid(self, form):
instance = form.save()
instance.user = self.request.user
instance.tagName = self.request.tagName
instance.instance = str(self.request.instance_name)
instance.save()
return HttpResponse(status=200)
Update - Edited
I have update my view as:
def post(self, request, *args, **kwargs):
if request.method == 'POST':
form = BuildImageForm(request.POST)
if form.is_valid():
data = form.cleaned_data
form.instance.user = self.request.user
form.instance.tagName = data['tagName']
form.instance.instance = data['instance']
form.save()
else:
print(form.errors)
return HttpResponse(status=200)
Now it prints that error in console:
<ul class="errorlist"><li>instance<ul class="errorlist"><li>This field is required.</li></ul></li></ul>
[23/Jul/2017 04:36:56] "POST /user/images/buildImage/ HTTP/1.1" 200 0

Answer 1

Try changing your view method like this,
def form_valid(self, form):
instance = form.save(commit=False)
instance.user = self.request.user
instance.save()
return HttpResponse(status=200)

Answer 2

you are actually saving the file before adding data
def form_valid(self, form):
instance = form.save(commit=False)
instance.user = self.request.user
instance.tagName = self.request.tagName
instance.instance = str(self.request.instance_name)
instance.save()
return HttpResponse(status=200)

Answer 3

My issue has been solved just by providing a title attribute in my template for instance input field.
Updated code as:
buildImage.html
<form class="form-horizontal" method="POST" id="dockerForm">
{% csrf_token %}
<fieldset>
{% if not objectlist %}
<h3><strong>Sorry!</strong> You couldn't have created any Instance yet! <strong>Let's Create One </strong></h3>
{% else %}
<div class="form-group">
<span class="col-md-1 col-md-offset-2 text-center"><label for="package">Select Your Instance:</label></span>
<div class="col-md-8">
<select class="form-control" name="instance" id="instance_id" title="Select your Instance">
{% for element in objectlist %}
<option value={{ element.name }}> {{ element.name }} </option>
{% endfor %}
</select>
{% endif %}
</div>
</div>
</fieldset>
</form>
forms.py
class BuildImageForm(forms.ModelForm):
class Meta:
fields = ('tagName', 'instance')
model = Image
views.py
def post(self, request, *args, **kwargs):
if request.method == 'POST':
form = BuildImageForm(request.POST)
if form.is_valid():
data = form.cleaned_data
form.instance.user = self.request.user
form.instance.tagName = data['tagName']
form.instance.instance = data['instance']
form.save()
else:
print(form.errors)
return HttpResponseRedirect(reverse('users:gui'))

Answer 4

try to set try and cache for database operation
may be there is some error cached in cache section
Update
try:
"save to database code here"
except Exception as e:
print "error here" print e