Django Saving selected values of ManytoMany Field - django

Question

Here I am trying to save selected fields in the manytomany field.
When I try to save the selected fields all fields other than selected are also saved. How can i save only the selected fields.
here is my model..
#model
class Products(models.Model):
name = models.CharField(max_length=128)
product_code = models.CharField(max_length=128)
cmp_id = models.ManyToManyField(Components, blank=True)
bay_id = models.ManyToManyField(ScanningBay, blank=True)
def __str__(self):
return self.name
#form
class ProductForm(forms.ModelForm):
name = forms.CharField(max_length=15,widget=forms.TextInput(attrs={'class':'form-control','placeholder': 'Product Name','size': '40'}))
product_code = forms.CharField(max_length=15, widget=forms.TextInput(
attrs={'class': 'form-control', 'placeholder': 'Product Code', 'size': '40'}))
bay = forms.ModelMultipleChoiceField(queryset=ScanningBay.objects.all())
component = forms.ModelMultipleChoiceField(queryset=Components.objects.all())
​
class Meta:
model = Products
fields = ('name', 'product_code','bay','component')"
​
#views
def products(request):
if request.method == 'POST':
p_form = ProductForm(request.POST or None)
new = p_form.save(commit=False)
new.save()
z = p_form.save_m2m()
print (z)
return HttpResponse("success")
else:
pdct_form = ProductForm()
return render(request, 'app/products.html', {'pdct':pdct_form})
this is the template rendered ​
<form id="test" class="impexform" action="{%url 'products'%}" method="POST">
{% csrf_token %}>
{{pdct}}
<button type="submit" class="btn btn-sm btn-danger mt-3"
style="background:#ed2526; border-radius: 30px; width: 8rem;">Add Product</button>
</form>

Answer 1

The fields in your form don't match the fields on your model:
class ProductForm(forms.ModelForm):
...
cmp_id = forms.ModelMultipleChoiceField(queryset=Components.objects.all())
​
class Meta:
model = Products
fields = ('name', 'product_code','bay','cmp_id')"