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Accepted
Fernando Javier León
Asked: 2022-06-02 21:09:41 +0800 CST 2022-06-02 21:09:41 +0800 CST

Convert object to json in view from django rest framework

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I have a view in django rest framework that allows me to generate a pdf, I want to get the data from models, I have this function in views.py:

def generaPdf(request):
    
    stu = models.ConfiguracionCv_Personalizado.objects.filter(id_user=4)
    serializer = ConfiguracionCv_PersonalizadoSerializer(stu, many=True)
    print(serializer.data)
    json_data = JSONRenderer().render(serializer.data)

    
    # PDF = generapdf.PDF
    pdf = PDF()
    pdf.alias_nb_pages()
    pdf.add_page()
    pdf.set_font('Times', '', 11)
    for k, v in json_data.items():
        pdf.cell(0, 10, f"{k}: {v}", 0, 1)
    pdf = pdf.output(dest='S').encode('latin-1')
    response = HttpResponse(pdf, content_type='application/pdf')
    response['Content-Disposition'] = 'attachment; filename="mypdf.pdf"'
    return(response)

In serializers.pyI have this:

class ConfiguracionCv_PersonalizadoSerializer(serializers.ModelSerializer):
    class Meta:
        model = ConfiguracionCv_Personalizado
        fields = ('__all__')

I am trying to convert models.ConfiguracionCv_Personalizado.objectsto json to loop through it in the for and add the information to the pdf, but I am getting this error 'bytes' object has no attribute 'items'. How can I convert models.ConfiguracionCv_Personalizado.objectsit to json and be able to go through it in the for. I hope you can help me. Thanks in advance.

python

1 Answers

  1. Best Answer

    the json cannot be traversed directly as you mention, to traverse it you must first convert it into a dictionary which python does understand, remember that although the json looks like the dictionary they are different objects so json cannot be traversed directly with a for loop use this line

    json_data=json.loads(json_data)

    right after the line. Jsonrenderer()....etc json_data with your current code, it's already a json object but it's not yet a dictionary object to go through with your for loop so this line converts json_data to a dictionary so you can iterate over it

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