How to select and save foreign key object in django views - django-forms

Question

I am new to django and was trying to select and save a foreign key object from model ProcessCategory.name in the ProcessGroup view . It works fine in admin, but i couldn't get it to work in my html.
Here's the model, view and html code.
can anyone please help?
models.py:
class ProcessCategory(models.Model):
name = models.CharField(max_length=200, primary_key=True)
desc = models.CharField(max_length=250, null=True, blank=True)
def __str__(self):
return self.name
class ProcessGroup(models.Model):
proc_category = models.ForeignKey(ProcessCategory, on_delete=models.CASCADE)
name = models.CharField(max_length=200, primary_key=True)
desc = models.CharField(max_length=250, null=True, blank=True)
def __str__(self):
return self.name
views.py:
def ProGrp(request):
p_category = ProcessCategory.objects.all()
return render(request, 'manage_group.html', {'p_category': p_category})
def ProGrp_save(request):
if request.method != "POST":
return HttpResponse("Method Not Allowed")
else:
pro_cat = request.POST.get("pro_cat")
pro_group = request.POST.get("add_pro_group")
pro_desc = request.POST.get("add_pro_desc")
process_category = ProcessGroup(
proc_category=pro_cat)
process_group = ProcessGroup(name=pro_group)
process_desc = ProcessGroup(desc=pro_desc)
process_category.save()
process_group.save()
process_desc.save()
messages.success(request, "Successfully Added Process Group")
return HttpResponseRedirect('add_pro_grp')
urls.py:
urlpatterns = [
path('add_pro_grp', views.ProGrp, name='add_pro_grp'),
path('add_progrp_save', views.ProGrp_save, name='add_progrp_save'),
]
HTML
<select class="form-control" name = 'pro_cat' placeholder="Select Process Category">
{% for each in p_category %}
<option value = {{each.name}} > {{each.name}} </option>
{% endfor %}
</select>

Answer 1

My answer assumes that you only want to create one ProcessGroup with all three fields populated.
I would suggest using ProcessGroup.objects.create [docs]. This will create and save the ProcessGroup for you all in one statement.
This will correctly set the proc_category foreign key for you if pro_cat is the primary key (pk [docs]) of a ProcessCategory or is an instance of ProcessCategory.
process_group = ProcessGroup.objects.create(
proc_category=pro_cat,
name=pro_group,
desc=pro_desc,
)
Edit for HTML solution
The value= on the <option> is what gets passed to the POST data, so to ensure that the save view is getting a value it can save just change your option tag a little bit. Switch each.name to each.pk to give your view the value it needs.
<option value="{{ each.pk }}"> {{ each.name }} </option>