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@marcgibbons
marcgibbons / concat_json_expression.py
Last active September 12, 2023 19:05
Expression to concatenate Django Postgres JSONField
from django.db.models.expressions import CombinedExpression, F, Value
from django.contrib.postgres.fields import JSONField
expression = CombinedExpression(
F('my_json_field'),
'||',
Value({'fizz': 'buzz'}, JSONField())
)
import pandas as pd
import numpy as np
@bzamecnik
bzamecnik / process_memory_usage_osx.sh
Last active January 24, 2021 15:37
Process memory usage on OSX using GNU time
# On Linux we can use native GNU time, on OSX we have to install gnu-time
# manually, since native time doesn't measure memory.
# http://man7.org/linux/man-pages/man1/time.1.html
# http://braumeister.org/formula/gnu-time
$ brew install gnu-time
# can be called via gtime, since time is a bash command
# %M - Maximum resident set size of the process during its lifetime, in Kbytes.
@apollo13
apollo13 / chromelogger.py
Last active May 12, 2022 01:09
Django logging to Firefox/Chrome devtools
"""
License: MIT - https://opensource.org/licenses/MIT
ChromeLogger is a protocol which allows sending logging messages to the Browser.
This module implements simple support for Django. It consists of two components:
* `LoggingMiddleware` which is responsible for sending all log messages
associated with the request to the browser.
* `ChromeLoggerHandler` a python logging handler which collects all messages.
@lockie
lockie / trigram_migration.py
Last active January 14, 2018 11:45
A Django migration to add PostgreSQL trigram search, aka pg_trgm
# -*- coding: utf-8 -*-
# XXX this is actually useful for very special use cases, e.g. misspel suggestions:
# https://www.postgresql.org/docs/9.6/static/pgtrgm.html#AEN180626
from __future__ import unicode_literals
from django.db import migrations
from django.contrib.postgres.operations import TrigramExtension
class Migration(migrations.Migration):
operations = [
@pylover
pylover / a2dp.py
Last active May 13, 2026 04:42
Fixing bluetooth stereo headphone/headset problem in ubuntu 16.04, 16.10 and also debian jessie, with bluez5.
#! /usr/bin/env python3
"""Fixing bluetooth stereo headphone/headset problem in debian distros.
Workaround for bug: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1577197
Run it with python3.5 or higher after pairing/connecting the bluetooth stereo headphone.
This will be only fixes the bluez5 problem mentioned above .
Licence: Freeware
@raprasad
raprasad / test_unmanaged_models.md
Last active November 1, 2023 00:04
Ignoring migrations during Django testing (unmanaged databases, legacy databases, etc)

Scenario

  • Django 1.9 application with two databases:
    • Legacy database with readonly access via unmanaged models. Both Django models (models.py) and related migrations have "managed" set to False
      • 'managed': False
    • Default database holding django specific tables (e.g. auth_user, django_content_type, etc)

Testing Woes

@pauloxnet
pauloxnet / signals.py
Last active April 1, 2016 08:45 — forked from jefftriplett/signals.py
Django management command to trace / list all signals. My fork is just a few cleanups where CommandError wasn't referenced, etc.
# coding:utf-8
import gc
import inspect
import weakref
from django.core.management.base import BaseCommand, CommandError
from django.dispatch import Signal
from django.dispatch.weakref_backports import WeakMethod
from optparse import make_option
@jmichalicek
jmichalicek / PrimaryKeyInObjectOutRelatedField.py
Created February 23, 2016 18:19
Django Rest Framework RelatedField allows a PK for input but returns a fully serialized model in response
class PrimaryKeyInObjectOutRelatedField(relations.PrimaryKeyRelatedField):
"""
Django Rest Framework RelatedField which takes the primary key as input to allow setting relations,
but takes an optional `output_serializer_class` parameter, which if specified, will be used to
serialize the data in responses.
Usage:
class MyModelSerializer(serializers.ModelSerializer):
related_model = PrimaryKeyInObjectOutRelatedField(
queryset=MyOtherModel.objects.all(), output_serializer_class=MyOtherModelSerializer)
@arthuralvim
arthuralvim / permissions.py
Created September 10, 2014 14:27
Django Rest Framework - Only ajax requests are permitted.
from rest_framework.permissions import BasePermission
class IsAjaxPermission(BasePermission):
"""
Check is request is ajax.
"""
def has_object_permission(self, request, view, obj):
return request.is_ajax()