django filter field with operation code example

Example 1: filter field set in django formds

class AgregarProducto(forms.ModelForm):
    class Meta:
        model   = productos

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        super(AgregarProducto, self).__init__(*args, **kwargs)
        self.fields['secciones'].queryset = secciones.objects.filter(user=user)

Example 2: filter field set in django formds

from django.contrib.auth.decorators import login_required

@login_required
def agregar_producto(request):

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