Accessing Django ManyToManyField via Ajax using its ID

Here are my models:

class Topping(models.Model):
    name=models.CharField(max_length=24)

class Pizza(models.Model):
    toppings=models.ManyToManyField(Topping)

Now, onto the views:

def get_pizza(request):
    if request.is_ajax():
        pizza_list=[]
        pizza_list=Pizza.objects.all()
        pizza_list_json = serializers.serialize('json', pizza_list)
        return JsonResponse({'result': 'OK', 'data': { 
            'pizza_list': pizza_list_json, 
        }})

Lastly, let's take a look at the Javascript code:

function get_pizza() {
    $.ajax({type: 'POST',
        url: '/path/get_pizza/',
        data: {
        },
        success: function (lista) {
            if (lista.result === 'OK') {
                var pizza_list_json=lista.data.pizza_list;
                pizza_list = JSON.parse(pizza_list_json);
                make_pizza(pizza_list);
            };
        }
    });
};

function make_pizza() {
    for (i=i; i<pizza_list.length; i++) {
        var myfield=toppings;
        var list_elem=pizza_list[i].fields[myfield];
    };
};

The issue arises when list_elem=[1, 4] contains object IDs instead of names like list_elem=[tomato, peperoni]. While to_field=name can be used with foreign keys, it doesn't work with ManyToManyField. Attempting myfield__name results in a myfield__name is not defined error. I'm wondering if there's a different approach to defining pizza_list in the view. What could be an efficient solution to handle this situation?

Thank you.

Answer №1

  1. Develop a fresh perspective by crafting a customized view that accepts the unique identifier as input and outputs the corresponding name in JSON format, for instance: {"name": "Jalapeno"}.
  2. Establish a functional mechanism that triggers a request to access the specified URL linked with the devised view, extracting the designated name variable from the JSON response.
  3. Integrate the retrieved value into your desired location using a designated function, such as displayElemName(elem_id).

The described approach provides a fundamental solution strategy for addressing your issue. It is worth noting that the potential downside might involve multiple database queries depending on the number of items in the list. Consider this aspect if you are comfortable with this method's efficiency.

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