django convert model instance to dict

Question

I am a beginner in Django. And I need to convert Model instance in to dictionary similar as Model.objects.values do, with relation fields. So I write a little function to do this:

def _get_proper(instance, field): if field.__contains__("__"): inst_name = field.split("__")[0] new_inst = getattr(instance, inst_name) next_field = "__".join(field.split("__")[1:]) value = _get_proper(new_inst, next_field) else: value = getattr(instance, field) return value def instance_to_dict(instance, fields): return {key: _get_proper(instance, key) for key in fields}

So, i can use it in such way:

user_obj = User.objects.select_related(...).get(...) print instance_to_dict(user_obj, ["name", "city__name", "city_id"])

May you propose the better solution? Thanks! P.S. Sorry for my English.

Possible duplicate of Convert Django Model object to dict with all of the fields intact — Zags
– Zags, Commented Oct 18, 2016 at 20:44

Sachin Kolige · Accepted Answer · 2018-03-14 14:29:54Z

27

This actually already exists in Django, but its not widely documented.

from django.forms import model_to_dict my_obj = User.objects.first() model_to_dict(my_obj, fields = [...], # fields to include exclude = [...], # fields to exclude )

edited Mar 14, 2018 at 14:29

Sachin Kolige

3732 silver badges7 bronze badges

answered Feb 27, 2015 at 4:39

user764357

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3 Comments

Taras Protsenko Over a year ago

I know about it, but this function doesn't work with related fields like city__name

jackbravo Over a year ago

The link didn't work. This is the updated link: timsaylor.com/convert-django-model-instances-to-dictionaries

Dimitrios Mistriotis Over a year ago

And the link in the link (to source code) is github.com/django/django/blob/master/django/forms/models.py#L70

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