abidibo.net

Weblog

Using django-mptt TreeNodeChoiceField in a TabularInline admin form

django django-admin django-mptt

I use to use the django-mptt package to deal with tree like models. I also use to have my backoffice autogenerated by django admin.

Now one of the problems I've encountered was to add an inline form of a model which contains a "tree" field in a way the user can deal with a select input well formatted (showing parents and children in a clear way).

This task is easily reached in a normal form by defining the form ...

read the full post


Two must-have apps for android sysadmins

android mobile tips

This is only a short post to speak about two free awesome applications which I considered essential (especially the keyboard one) to perform sysadmin task from remote.

android

The terminal

I've tried a lot of them, and finally I decided to stay with Android Terminal Emulator, is fast and clean, and works well on my SGS.

The keyboard

Well, for those like me who can't edit text without vim the first problem to face when editing from mobile is ...

read the full post


moogallery, release 0.2

moogallery mootools programming webmaster javascript

Ok, the release 0.2 of moogallery is out!, Check out the updated demo here.

The new release offers some new interesting features:

  • Youtube and vimeo videos support
  • Audio support, mpeg and ogg encoding to assure cross browser capability
  • Mobile detection and swipe event handler to navigate through media in the lightbox view (requires Christoph Pojer's mootools-mobile plugin)

Maybe in the future I'll integrate a listener for the changes in the device orientation so that the gallery reloads recalculating the available dimensions. Such thing may be already done manually.

Check out the new release and comment here to let me know which improvements you'd add to the plugin.


Django, add properties to model instances

django programming tips

I've just discovered a great thing on django. Like in javascript, it is possible to add dynamically properties to a model instance, and use them inside a template. This is extremely useful in my opinion because saves us from creating a new dictionary mapping the object properties with the addition of the properties that we want to add.

Here a short example: I have a model WorkingPlace which is related to a model Case in the sense that every ...

read the full post


Welcome moogallery

javascript moogallery mootools

moogallery plugin has just been released and charged to the mootools forge. Actually the plugin was already available from ajs, the javascript "addon" library for mootools which I populate with scripts I often use in my work.

moogallery is a plugin for mootools that allows you to create a gallery of images in a table format with tips and lightbox included. It 's enough to provide the container which has to contain the gallery and the path to the thumb and the whole images with related information (title, description, credits) to generate an autosized gallery inside the container in which the thumbs are loaded sequentially. Each thumb has attached an over event (showing the image title) and a click event ...

read the full post


Protected members in mootools classes

javascript mootools programming

Some times ago I wrote about the private static and instance members in mootools classes. Now it's time to speak about the protected members in mootools classes.

So the goal here is to obtain some members which are inherited from the parent class and accessible to a child class but not outside.

The trick is to use the Object.merge function to merge together the private properties of the parent exposed to the children through a protected method and the private properties of the child. Look at the following code:

  1. var ids = 1;

  2. var myParentClass = (function(){

  3.   var _protected_prop = {};

  4.   return new Class({

  5.     initialize: function(id, par1, par2) {
  6.       this.id = id;
  7.       ...

read the full post


Deploy django applications with nginx, uwsgi, virtualenv, south, git and fabric, part 5

deploy django fabric git nginx programming south uwsgi virtualenv

This is the fifth and last part of the django deploy environment, you may find the fourth part here.

In this part we'll see how to automate the deployment using fabric.

What the hell have fabric to do?

Well, fabric have to do all the work for me in the sense that once I've done some changes to my project and pushed them to the bare repository I want to update the production environment with only one command. I'd like also to setup initially the whole environment with only one command.

How does it work?

First of all install it, so with the virtualenv activated:

$ pip install fabric

Done.

Now reading from the official site:

Fabric is a Python (2.5 or higher) library and command-line tool for streamlining the use of SSH for application deployment or systems administration tasks. It provides a basic suite of operations for executing local or remote shell commands (normally or via sudo) and uploading/downloading files, as well as auxiliary functionality such as prompting the running user for input, or aborting ...

read the full post


Deploy django applications with nginx, uwsgi, virtualenv, south, git and fabric, part 4

deploy django fabric git programming virtualenv

This is the fourth part of the django deploy environment, you may find the third part here.

In this part we'll see how to freeze the project requirements, use versioning and prepare all in order to automate the deployment in production with fabric (which will be the argument of the last post, part 5).

Create a requirements.txt

As said in all previous posts, all the packages used by our project have been installed in a virtualenv which is strictly connected to our project. And if you were asking yourself why this is a convenient way to approach the django developement issue here comes the answer.

Activate the virtualenv, go inside the container folder of your django project and then perform this simple command

$ pip freeze > requirements.txt

This command simply creates a requirements.txt files which contains all the project dependencies, look at the image illustrating the project folder structure in the part 2, you'll see the same file there.

The nice part here is that you may setup an equivalent environment, with all the dependencies ...

read the full post


Deploy django applications with nginx, uwsgi, virtualenv, south, git and fabric, part 3

deploy django nginx programming wsgi

This is the third part of the django deploy environment, you may find the second part here.

In this part we'll see how to set up nginx and uwsgi to work with our django project.

Let's install and configure uwsgi

Be sure to have the virtualenv activated (see part 2), and then install uwsgi

$ pip install uwsgi

Ok now we have to configure our project to work with uwsgi, open and edit the myproject/myproject/wsgi.py file, mine looks like this:

"""
WSGI config for sic2012 project.

This module contains the WSGI application used by Django's development server
and any production WSGI deployments. It should expose a module-level variable
named ``application``. Django's ``runserver`` and ``runfcgi`` commands discover
this application via the ``WSGI_APPLICATION`` setting.

Usually you will have the standard Django WSGI application here, but it also
might make sense to replace the whole Django WSGI application with a custom one
that later delegates to the Django one. For example, you could introduce WSGI
middleware here, or combine a Django application with an application of another
framework.

"""
import os ...

read the full post


Deploy django applications with nginx, uwsgi, virtualenv, south, git and fabric, part 2

deploy django programming virtualenv south

Ok, this is the second part of the django deploy environment, you may find the first part here.

In the prevoius post we have seen how to install nginx webserver an some system packages, both in locale and remote, now it's time to start our developement in locale.

Let's create a new virtualenv

The use of virtualenv is incredibly comfortable and lets you keep separated environment for different projects. So first of all create a new virtualenv in the place you prefer

$ mkdir ~/virtualenv
$ cd ~/virtualenv
$ virtualenv --no-site-packages myproject

Done, now we can activate the virtualenv so that every new python package will be installed in it, so

$ source ~/virtualenv/myproject/bin/activate

MySQL as the database server

Why MySQL? Only because I'm easy with it, I know its syntax, I'm accustomed with it and because I use it at work.
But, since the role of mysql in the whole deploy structure finishes here, you may want to use a different db server, more efficient, lightweight and which uses less system resources

In the first post ...

read the full post


Your Smartwatch Loves Tasker!

Your Smartwatch Loves Tasker!

Now available for purchase!

Featured