I can not change the date format in django drf - django

Question

I have drf model which is containe DateField. That field default format is "YYYY-MM-DD" just i want to convert "DD-MM-YYYY" how can is possible.
from rest_framework import serializers
from.models import SpaUser
from djoser.serializers import UserCreateSerializer as BaseUserRegistrationSerializer
import datetime
from rest_framework.settings import api_settings
class SpaUserSerializer(serializers.ModelSerializer):
date_joined = serializers.ReadOnlyField()
birthdate = serializers.DateField(format="%d-%m-%Y", input_formats=['%d-%m-%Y',])

Answer 1

If it is universal, in your settings file add "DATE_INPUT_FORMATS" to REST_FRAMEWORK settings like:
REST_FRAMEWORK = {
"DATE_INPUT_FORMATS": ["%d-%m-%Y"],
...
}
for more details check http://www.django-rest-framework.org/api-guide/settings/#date-and-time-formatting

Answer 2

To have it correctly work, input_formats is the argument you need to assign the format needed, format is the output format
birthdate = serializers.DateField(input_formats=['%d-%m-%Y',])
or you can set the default input format in your settings
DATE_INPUT_FORMATS = [
("%d-%m-%Y"),
]

Answer 3

By combining all your solutions, it works
REST_FRAMEWORK = {
# "DATE_INPUT_FORMATS": "%d-%m-%Y", doesn't works
'DATE_INPUT_FORMATS': [("%d-%m-%Y"),],it works
'DEFAULT_AUTHENTICATION_CLASSES': (
'rest_framework_jwt.authentication.JSONWebTokenAuthentication',
),
}

Answer 4

From DRF documentation regarding DateField
Format strings may either be Python strftime formats which explicitly
specify the format, or the special string 'iso-8601', which indicates
that ISO 8601 style dates should be used. (eg '2013-01-29')
So in your case format should be
format="%d-%m-%Y"

Answer 5

Although this thread is quite old, I found it when trying to solve a similar problem. Although the responses didn't give me the entire answer, they did push me to simply read DRF's quite helpful documentation on the topic:
https://www.django-rest-framework.org/api-guide/settings/#date-and-time-formatting
In my case, I am building a events calendar using Vuetify's v-calendar, Vue JS, and DRF. The v-calendar requires the format YYYY-MM-DD HH:MM, and prefers a string. I could simply store the string in my DB, but I preferred to store the datetime fields in native Python formatting for server-side processing should I ever need them. So, in my settings.py file, I added the following to my REST_FRAMEWORK setting:
'DATETIME_INPUT_FORMATS': ['%Y-%m-%d %H:%M',],
'DATETIME_FORMAT': '%Y-%m-%d %H:%M',
The first one takes a list (hence the brackets and comma), the second just takes a string. Then, in my serializer, I use:
start = serializers.DateTimeField()
On the front end, I take in the dates as the string objects, pass them to the calendar for display, and it works. When POSTing data, I simply pass them back in that same string format, and the DRF serializer encodes them as native Python for storage.

Answer 6

We have to differentiate between all these:
DATE_INPUT_FORMATS
To specify the date format for the input in POST request API.
DATETIME_FORMAT
To specify the DateTime format for serialized data like with GET request.
DATE_FORMAT
To specify the Date format for serialized data like with GET request.
And this is an example of how to use these settings in the settings.py file.
REST_FRAMEWORK = {
'DATE_INPUT_FORMATS': ["%Y-%m-%d %H", ],
'DATETIME_FORMAT': '%Y-%m-%d %H',
'DATE_FORMAT': '%Y-%m-%d %H'
}
Note: You should use these settings just if you want your serializer to have the same data or DateTime format.
But in case you have changed in some field you can just change the format for that field and here is an example of how to do like this:
class YourSerializer(serializers.ModelSerializer):
...
def to_representation(self, instance):
representation = super(YourSerializer, self).to_representation(instance)
representation['created_at'] = instance.created_at.strftime('%Y-%m-%d %H)
return representation
Or in a similar way
class YourSerializer(serializers.ModelSerializer):
created_at = serializers.DateTimeField(format='%Y-%m-%d %H')

Answer 7

In settings.py include:
REST_FRAMEWORK = {
'DATE_FORMAT': '%d-%m-%Y'
}