Aurora Borealis

GitHub Secure Code Game

Thu, 19 Dec 2024 07:00:00 +0000

While randomly surfing the Internet, I found an interesting repo from GitHub. It’s called Secure Code Game. I have tried the first level from the first season. It’s quite interesting. It was about underflow bug. We’ve heard more about overflow.

I’ll try fo find time to work on other levels.

Multiple OS on WSL

Fri, 27 Sep 2024 07:00:00 +0000

Hi there,

How are you? How’s everything?

I just want to post it here, that it turns out, we can have multiple OS on WSL.

PS C:\ wsl --list --online

Django Post Idea

Tue, 22 Jan 2019 02:20:00 +0000

Wow, it’s already 2019! And I just skipped 2018 without even a single post! For this post, I just want to write short.

So far, I have two ideas on writing a new post. They are:

Migrating legacy Django hash password
Testing Django form with real data

Let’s hope I can write this soon. See you!

Improve Programmers Skill

Tue, 12 Sep 2017 15:20:00 +0000

Recently, I attended PyCon APAC 2017 which was held in Kuala Lumpur, Malaysia. It’s always nice to meet new people and share stories.

It turned out, the most interesting talk for me was one of the session in lightning talk. It was delivered by Ivan.

Ivan shared that programmers should always upgrade their skill and it can’t be done by working on our daily routine. We should take class, do some side projects, or even try some code contest.

For example, solving a simple problem but only using the standard library. If most of the time we are requests library to make HTTP access, now try not to use requests library. Instead just use Python standard library.

I definitely want to always upgrade my skill. I just have to find the time and the method that suits me. I found reading still important, but I guess problem solving still the best way to practice.

Test Python/Django Script

Mon, 27 Mar 2017 15:00:00 +0000

Now I am thinking a better approach on testing Python/Django script. I have a Python script which runs in a Django application. For example, this script will send an email with how many new users registered in this week.

So far, I use the manual approach, which requires me to have new user registered within this week. I am not very satisfied with this approach, as the script is getting complex, I need to manually prepare the data.

Any idea?

Fail Running Test Code

Wed, 26 Oct 2016 16:56:24 +0000

I was recalling, how did I run the test code. Until I found that I had written the snippet. I copy-paste it… and the test code was fail. Something wrong. No changes in the test code since my last commit.

I tried the other test code. Looks OK. I tried to rename the fail test code filename, still no good. So, what’s the problem?

Until I found this stackoverflow question.

So, I tried to import the modules written in the test code via shell. Finally now I know which part of the code that fails to import the library.

MelbDjango Camp

Wed, 16 Dec 2015 16:56:24 +0000

It’s almost a month passed by from MelbDjango camp. I was planning to write a short review about it. So, let’s just give it a start. Better late than never.

For me, Django community in Melbourne has been a very vibrant community. You name it! They have meetups, school, hack weekend and lastly the camp initiative. And I’ve learned a lot from the community.

The camp lasted for two days and two nights. Basically we working on our own Django projects. And when you got stuck on something, there’s always someone who will help you.

I was working on two Django projects. The first one, I was trying to visualize a Django app using d3.js Then the second one, I was trying to build a geographic information Django app. I also learned how to setup Django using PostgreSQL as the backend.

Other than that, there were three workshops. The first one was Django-low down (Django slow down). We’re going through the Django docs and start creating a Django application from the scratch.

The second was creating a vulnerable Django application. The reason was to prevent creating a vulnerable application by getting know what is a vulnerable Django application.

And the last workshop was about Django template. What has Django template working for us, why Django template is slow, and so on.

This camp was a great experience for me! I knew about redshift: an app that adjust your computer screen according to your position. At first I was surprised when I saw other’s monitor screen turning into red. Then I knew how to work on Django project tickets.

Get Lost

Wed, 25 Nov 2015 19:04:24 +0000

Working with multiple monitors seem like a programmer’s heaven. Yes, it is. I like it. And now, I really enjoying my first vertical screen ever. Unfortunately I might only use this rotateable monitor this weeend.

The difficult thing about working with multiple monitors (then multiple tabs) is finding which the tab that currently you need it. Sometimes I need to scroll each tab to find the right tab and move mouse pointer to other monitors.

And the other get lost thing is when english is not your native language. You might miss the context in a informal conversation since mostly I learn english in a formal context.

I am a bit tired actually when writing this post. I’ve tried to get my Django app to return JSON value. Now I need to visualize this using d3.js In the morning, we had a djangolow-down by Mitch and we just finished OWASP Top 10 in Django by Brenton.

Then when I tried to post a blog on my wordpress blog, the Internet was not working. So, I wrote this blog in a git post. Hopefully the git push will work.

Host Sphinx Documentation at GitHub Pages

Fri, 06 Nov 2015 07:17:24 +0000

Today I released a documentation to which we wrote using sphinx to GitHub (project) pages. After did git push origin gh-pages, I saw the HTML is not pretty. Later, my friend found it was failed loading the CSS.

So this is the solution. Add a .nojekyll file. And voila!

Django Filter Query Exception

Mon, 29 Jun 2015 11:44:20 +0000

While looking for answers on this question: “Does multiple monitor increase programmer’s productivity?”, I found interesting tips from Joelon Software blog post. It’s the fourth Joel’s Test: A Bug Database.

Since, I still don’t know yet what tool will help us to store our bugs, I’ll write my first bug in this blog post. And also I’d like to know how to write snippet in Jekyll, which powered this blog.

So, let’s give it a shot!

Example, I am querying database using Django query filter.

try:
	borrowed_books = Book.objects.filter(borrow_date__lte=datetime.date.today(), 
		user=request.user, borrow_status=True)
except Book.DoesNotExist:
	raise Http404("You're not borrowing any books")

This code will not return the exception eventhough there is no match with the filter rule. No match filter query will only return empty list. So, I need to fix the code.

Let’s try to debug using the django shell.

>>> from aurora.apps.users.models import User
>>> u1 = User.objects.get(email='borrower101@aurora.co')
>>> from aurora.apps.books.models import Book
>>> borrowing = Book.objects.filter(borrow_date__lte=datetime.date.today(), 
		user=u, borrow_status=True)
[]
>>> u2 = User.objects.get(email='borrower102@aurora.co')
>>> borrowing = Book.objects.filter(borrow_date__lte=datetime.date.today(), 
		user=u, borrow_status=True)
[<Book: Dahl, Roald>, <Book: Griffith, Andy>]

So user u1 doesn’t borrow any books while u2 borrows 2 books. What to do to improve this code? We could check the query length. If the query length equalas to zero then we could throw the exception.

borrowed_books = Book.objects.filter(borrow_date__lte=datetime.date.today(), 
	user=request.user, borrow_status=True)

if borrowed_books.count() == 0:		
	raise Http404("You're not borrowing any books")

That’s all for now.