from django.contrib.auth.models import User
from rest_framework import serializers
from rest_framework.validators import UniqueTogetherValidator
from standards.models import Standards

class StandardsSerializer(serializers.ModelSerializer):

    username = serializers.SerializerMethodField('getCreatedByUser')
    last_modified_on = serializers.SerializerMethodField('getFormatedLastModified')

    class Meta:
       model = Standards
       fields = ["id", "name", "last_modified_on", "username", "content"]

    def getCreatedByUser(self, standard):
        return standard.created_standard_by.first_name + " " + standard.created_standard_by.first_name

    def getFormatedLastModified(self, standard):
        return standard.last_modified_on.strftime("%d.%m.%Y %H:%M")