tuxtitlan

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

tuxtitlan

import base64

from django.core.files.base import ContentFile
from rest_framework import serializers


class Base64ImageField(serializers.ImageField):
    def from_native(self, data):
        if isinstance(data, basestring) and data.startswith('data:image'):
            # base64 encoded image - decode