http://www.mdgart.com Art & Programming Thu, 12 Jan 2012 11:56:28 +0000 http://backend.userland.com/rss092 en Yesterday I had a weird problem with a Django application that should primarily work on computer behind a proxy server: for some reason that I didn't understand yet, the proxy lost the session's cookie, but only when a form send data (via POST) to a view that is visible only ... http://www.mdgart.com/2011/01/15/django-auth-behind-proxy-server/ If you use the Django Auth Framework you may need to know the existence of this constant that you can set in the settings.py of your project: SESSION_COOKIE_DOMAIN = ".yourdomain.com" when you login, your cookies session will be set to be valid on every subdomain, so you will be still logged in ... http://www.mdgart.com/2011/01/15/django-tip-cross-domain-cookies/ I'm working on a project and I'm using the incredible django admin. So, yesterday I needed a way to hide some fields in a model for user that didn't have superuser permissions. After some googling, I found a method in the ModelAdmin class that was perfect (well, I think that ... http://www.mdgart.com/2010/04/08/django-admin-how-to-hide-fields-in-a-form-for-certain-users-that-are-not-superusers/ According to w3c browser statistics ie6 is less then 10% of the market today, and ie7 is 11%. IE8 is growing (about 15%) and, although it is not the best browser on earth it is a big step forward. A preview release of IE9 has been unveiled, and it seems ... http://www.mdgart.com/2010/04/06/time-to-change/ Many people asked me how to implement the basic CRUD functionalities for the D&D Tree, so here it is: Download persistentTreeCRUD.zip I use the simpletree callback function afterDblClick for the modify functionality, and a simple jQuery click for add and delete. I also used nyroModal for the popup windows. In this example ... http://www.mdgart.com/2009/08/04/persistent-drag-and-drop-tree-with-jquery-php-and-mysql-crud/ If you are (like me) a mac fan and you use the excellent Panic Coda to develop, you should know that is now possible to write plugins with every languages you want (if you have the interpreter installed on your system). Python is bundled on every mac, and is also a ... http://www.mdgart.com/2009/03/31/how-to-develop-a-plug-in-for-panic-coda-with-python/ In this second part of this article (this is the first part) i'm going to show you how to retreive and serialize the tree structure using jQuery and sent the serialized data to a php script (using ajax) that saves it on the database. In this way, we can have ... http://www.mdgart.com/2009/03/29/persistent-drag-and-drop-tree-with-jquery-php-and-mysql-part-2/ I'm developing a website that have a catalog with nested categories; this categories are also ordered and with a not predefined depth levels. I needed to find a way to manage with category in a fast and intuitive way for the user, so i decided to use a directory like ... http://www.mdgart.com/2009/03/15/persistent-drag-and-drop-tree-with-jquery-php-and-mysql-part-1/ I had to find a regex to match not a string that contain something, but a string that not contain something, and in particular i had to check that a link entered in a form does not begin with http://. I needed to use a regex for this that work ... http://www.mdgart.com/2009/01/23/regex-link-not-beginning-with-http/