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Django: creating dynamic forms

I have these models and I want to create forms based on data:

class Location(models.Model):
    name=models.CharField(max_length=255)
    location_id=models.CharField(max_length=255)
    organization=models.CharField(max_length=255)

    def __unicode__(self):
        return self.name

class Beverage(models.Model):
    name=models.CharField(max_length=255)
    location=models.ForeignKey(Location)
    fill_to_standard=models.IntegerField(max_length=10)
    order_when_below=models.IntegerField(max_length=10)

    def __unicode__(self):
        return self.name

class Inventory(models.Model):
    location=models.ForeignKey(Location)
    beverage=models.ForeignKey(Beverage)
    units_reported=models.IntegerField(max_length=10)
    timestamp=models.DateTimeField(auto_now=True)

This is what I want, when the user goes to update the inventory for a certain place, I want them to get a form that lists all the possible drinks for that location (drinks differ for each place), and then create a form Inventorythat will create a new row in the table Inventoryfor each Beveragefor this Location. Everyone needs a timestamp so we can have a story. I think that I get that I need forms, but I have not had any success figuring out how to implement them. So, this is a kind of two-partner:

  • Is my model design right for this problem?
  • , , ?
+3
1

1: - Inventory, Beverage . .

2: ...

forms.py

from django import forms
from my_project.my_app.models import Beverage

class InventoryForm(forms.ModelForm):
    units_reported = forms.IntegerField()
    class Meta:
        model = Beverage
        fields = ('name', 'id')

views.py

from django.forms.models import modelformset_factory
from my_project.my_app.models import Beverage, Inventory

def update_inventory(request, location_id):

    InventoryFormSet = modelformset_factory(Beverage, form=InventoryForm)
    qs = Beverage.objects.filter(location=location_id)
    formset = InventoryFormSet(queryset=qs)
    if request.method == 'POST':
        formset = InventoryFormSet(request.POST)
        if formset.is_valid():
            for form in formset:
                beverage = form.save(commit=False)
                units_reported = form.cleaned_data['units_reported']
                Inventory(beverage=beverage, units_reported=units_reported).save()
    ...

modelformset_factory () , , ModelForm .

+2

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