Intergrate Chart.js with Django ( data not showing )

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You are returning Response(data). I have no idea what type of Response this is. Better return a JsonResponse.

from django.http import JsonReponse
class ChartData(APIView):
    # your code
    def get(self, request, format=None):
        # your code
        return JsonResponse(data)

Then in your js script, specify the dataType as json, or parse the data explicitly.

// Specify the dataType as json
$.ajax({
    method: "GET",
    urls: endpoint,
    dataType: "json",
    // rest of your code
});

// Explicitly parse data
$.ajax({
    success: function(data){
        jsonData = JSON.parse(data);
        labels = jsonData.labels;
        defaultData = jsonData.default;
        setChart();
    },
    // rest of your code
});

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