Brad's Blog

web dev, django, running, food, or whatever

Published: 2017-01-03

Why is runserver/daphne so slow?

channels daphne django node node_modules react

(tl;dr) I installed django-channels and now my runserver command is very very slow. django-debug-toolbar was sort of the culprit (not really, because it was my own fault) The problem I've just started a new project using django-channels. Websockets + channels is incredibly powerful, but I noticed something strange: While running django in debug mode, the development server was incredibly slow (on the average of 60s-90s per response). After a bit of digging, it seemed that django-debug-toolbar was to blame ...

Published: 2016-12-10

2016 St Jude Memphis Marathon

It's been exactly one week since I participated in the St. Jude Memphis Marathon, and I wanted to take a moment to say thank you to everyone who helped me get so close to my fundraising goal. Together, we raised $1435 of $1500, and I'm really happy about that (although, you can still give up 'till January!). As for the race, well... I'm glad I ran it. This year, I've run a 50k, a 50-miler, and ...

Published: 2016-05-21

Help me support St Jude

fundraising marathon running stjude

If you've known me for a while, you might know that I'm a runner. Since I live in (near) Memphis, TN it's hard not to get excited about the St Jude Memphis Marathon. Surprisingly, this will only be my second marathon, and this year I've decided to run the race as a St. Jude Hero. What's a St. Jude Hero? Well, I've pledged to raise at least $1500 in donations for St. Jude, and ...

Published: 2016-04-29

Let's convert a Word Doc to HTML

html pandoc python word

tl;dr I wrote a python script to convert Word documents to mostly-clean html. Get it at Ah, Microsoft Word... That glorious business-class software used all-around the world. It's perfect for those long, legal documents consisting of nothing but headers, paragraphs, and bulleted lists. All of which we an easily convert into simple HTML, right. Right? File > Save As > Web Page (.htm). Easy as... No wait, was that supposed to be File ...

Published: 2016-03-11

50 miles

lhrl running ultra

Saturday, March 5, 2016. I woke up around 4:30am, and we drove out into the middle of nowhere in southern Mississippi. We arrived around 5:30am, and people were already lining up for the 6:00am start. It was 40°F, but the high for the day was supposed to hit the low-mid 70's. This was the Mississippi Trails 50. I'd run my first 50k in mid-January, but this was my first attempt at a 50-miler—a staple ...

Published: 2016-02-09

Young Coders at PyTennessee 2016

On February 6, 2016 I had the pleasure of teaching the Young Coders class at PyTennesse. It was an incredibly fun and rewarding experience, and I'm looking forward to doing this again at some point in the future. The class We had ten young coders ranging in ages from 12 to 17, and spent most of Saturday morning quickly plowing through examples of using python as a calculator, exploring data types like integers, floats, strings, and lists. We kicked ...

Published: 2015-12-16

Ignoring SuspiciousOperation requests for fun and (profit?)

If you run a Django site, you're probably familiar with those periodic emails due to a SuspiciousOperation exception; it happens when your site receives a request that contains a host header that's now found in the ALLOWED_HOSTS setting. Yes, they're annoying, and while it's good to know when this happens, I've found that there will typically be one or two requests that you get frequently (I'm looking at you, request for /azenv.php from ...

Published: 2015-10-18

A custom __date lookup for Django

database django lookups orm postgres python

⚠ Django 1.9 now includes a built-in __date lookup. If possible, you should use that instead of the code below, which doesn't support timezones. In my post last week on date lookups, I ended with a promise to take a look at building a custom django lookup (namely, a __date lookup). Django includes a basic Lookup class, and to build your own lookup expressions, all you really need to do is: Subclass django.db.models.Lookup define a ...

Published: 2015-10-10

Date lookups in Django

database django lookups orm postgres python

A while ago I tweeted out something that I've wanted to see in Django for a very long time, yet have never really taken the time to investigate or implement it: I wish #django had this: M.objects.filter(datetimefield__date=, 6, 29)) Has that ever been attempted?— Brad Montgomery (@bkmontgomery) June 29, 2015 Django's ORM has a very rich set of field lookups, but at present, it doesn't support an exact ...

Published: 2015-09-30

Django Admin Filters from ArrayFields

admin array arrayfield django filter postgresql

I've written before about the cool ArrayField support in Django, and this is another such post. In this one, we'll take a look and see how to turn your model's ArrayField values into filters in the admin. To start out, let's assume we have a model that contains a simple title (a CharField) and some keywords (an ArrayField). It might look something like this: from django.db import models class Item(models.Model): title = models.CharField ...