Hey everyone. I can’t seem to fix this, what I consider, basic concept for loading a datefield from an existing model object to a form for “editing”.
The object “Batch” has a datefield called “startdate”. It’s saved in the object, and I can see it in the form field. Yet, it’s not displayed/loaded in HTML, when I ‘GET’ with a ‘pk’ in my view.
models.py:
class Batch(models.Model):
def __str__(self):
return self.name
class Meta:
verbose_name_plural = 'batches'
name = models.CharField(max_length=50)
startdate = models.DateTimeField(auto_now=True)
enddate = models.DateTimeField(null=True, blank=True)
lotId = models.CharField(max_length=7, null=True)
size = DescriptiveQuantityField(base_units='liters', unit_choices=['liters','gallons'])
active = models.BooleanField(default=True)
fermenter = models.ForeignKey(Fermenter, on_delete=models.RESTRICT)
startingGravity = QuantityField(base_units="sg")
estimatedEndGravity = QuantityField(base_units="sg")
category = models.ForeignKey(BatchCategory, on_delete=models.RESTRICT, blank=True, null=True)
activity = models.ManyToManyField(ActivityLog, blank=True, related_name='batch')
recipe = models.ForeignKey(Recipe, on_delete=models.RESTRICT, null=True, blank=True)
def transfer(self,src_vessel, dst_vessel):
pass
def complete(self):
self.enddate = datetime.now()
self.active = False
def current_gravity(self):
pass
def percent_complete(self):
pass
forms.py:
class BatchAddForm(forms.Form):
name = forms.CharField(widget=forms.TextInput(attrs={'placeholder':'Name of Batch'}),required=True)
startdate = forms.DateField(label="Start Date",widget=DateInput(attrs={'type':'date'}),required=True)
size = forms.CharField(widget=forms.TextInput(attrs={'placeholder':'i.e. 6 gallons'}),label = "Batch Size", required=True)
fermenter = forms.ModelChoiceField(queryset=Fermenter.objects.all())
startingGravity = forms.CharField(widget=PrecisionTextWidget(precision=3, base_units='sg'), label="Starting Gravity", required=True)
estimatedEndGravity = forms.CharField(widget=PrecisionTextWidget(precision=3, base_units='sg'), label="Estimated End Gravity", required=True)
recipe = forms.ModelChoiceField(queryset=Recipe.objects.all())
views.py:
def addBatch(request, pk=None):
if request.method == "POST":
form = BatchAddForm(request.POST)
if form.is_valid():
batch = Batch()
batch.name = form.cleaned_data['name']
batch.startdate = form.cleaned_data['startdate']
batch.size = form.cleaned_data['size']
batch.startingGravity = form.cleaned_data['startingGravity']
batch.estimatedEndGravity = form.cleaned_data['estimatedEndGravity']
batch.fermenter = form.cleaned_data['fermenter']
newbatch = batch.save()
batch.recipe = form.cleaned_data['recipe']
batch.save()
return HttpResponseRedirect(reverse('batch', kwargs={'pk': batch.pk}))
else:
return render(request, template_name='batchthis/addBatch.html', context={'form': form})
else:
if pk:
batch = Batch.objects.get(pk=pk)
form = BatchAddForm(initial=model_to_dict(batch))
form.fermenter = batch.fermenter
form.startdate = batch.startdate
pdb.set_trace()
else:
form = BatchAddForm()
form.fields['fermenter'].queryset = Fermenter.objects.filter(vessel__status=Vessel.STATUS_READY)
return render(request, "batchthis/addBatch.html", {'form': form})
When doing a trace() in my views.py, prior to sending the render() I reviewed the data:
>(Pdb) form.startdate
datetime.datetime(2025, 2, 24, 0, 3, 51, 778136, tzinfo=datetime.timezone.utc)
>(Pdb) print(form.startdate)
2025-02-24 00:03:51.778136+00:00
Rendered HTML:
<div id="div_id_startdate" class="form-group">
<label for="id_startdate" class=" requiredField">
Start Date<span class="asteriskField">*</span>
</label>
<div>
<input type="date" name="startdate" class="dateinput form-control" required id="id_startdate">
</div>
</div>
