Django with Google App Engine - Tutorial Resources - django

I know there have been a lot of questions of this, however those were either few years ago or did not really answer my specific question.
Main:1 - Anyone has any good recommendation, given the following of my needs:
I don't want to use any technology that is restricted within the App Engine infrastructure (e.g I know Google App Engine provides their framework too)
Some tutorial resources where it assumes that the person doesn't know App Engine and Django but with Python basics.
Main:2 - My second main question is that, does Django serves as one of the best web frameworks for hosting under Google App Engine?
I would appreciate anyone who's willing to share your knowledge on this !

Your requirements are unmeetable. Whatever framework you use, you are stuck with the fact that GAE uses Google's proprietary non-relational db. You can use Django along with Django-nonrel to paper over some of the differences, but they'll always be there.

Related

Twitter in Django

I have to create web application similar to twitter with a few tweaks using django. I am clueless if I have to use a CMS for this or any other existing django-application. Working from ground up is quite tedious to be honest. Can anyone recommend me which CMS( or anything else) I should attempt trying?
There is a project called trillr1. According to its page:
"Trillr is a Twitter-like microblogging service enhanced with user directory and group discussion features. " that's maybe what you want.
https://contributions.coremedia.com/trillr1
I guess, the closest you can come with an out-of-the-box software to imitate Twitter is Status.net, the software, that powers identi.ca. However, this is a PHP application.
I'm not aware of something similar in the Django world.

What is a simple way to make a basic website with graph database backend for newbie?

Graph database systems like ne04j seem to becoming very popular of late. I am a newbie user who is trying to set-up a website that needs to display some data which is best displayed using a graph database (essentially i will visualize this on the website).
I am designing this website using CMS Drupal but i am open to changing to other CMS or in worst case a web application framework like Django. Can anyone suggest me a basic template, website or extension to a CMS that enable graph databases or a good way to start learning web app development using graph databases for a noob ?
Well, if you're curious about using Drupal to manage graphs, I'd recommend looking over these contributed modules:
http://drupal.org/project/graphapi
http://drupal.org/project/charts
http://drupal.org/project/views_charts
http://drupal.org/project/charts_graphs
There is http://structr.org/, a CMS built on Neo4j and very Open and capable. Other bindings, you might take a look at REST bindings and neo4j embedded bindings to get going.
If you're looking for even more alternatives for charting in Drupal, then you may want to start from the Comparison of charting module, which includes information and links about quite a lot of charting related modules in Drupal.
If you're aware of other modules not included in it, please update that docu if you can, or let me know about it.

Django Admin site and Forms on AppEngine

i'm developing a web site hosted on AppEngine and wanted to use Django for some tasks. I've read these two answers:
Django on Google App Engine
Django and App Engine
But those are pretty old, and my question is a little more specific. I've taken a look at django-nonrel and seems good, but i've not used it and cant affirm anything.
So, the question is. Can I use the Admin site and the forms from Django with this package? If not, do you know any other patch that allow me to use them?
Thank you very much!
If you use django-nonrel, then you can use the Django admin site but it will be limited to the types of queries you can do on app engine. I personally found it easier to code my own simple admin interfaces that to type to make things work in Django Admin.
Regarding forms, regular Django Forms and ModelForms work quite well.
Yes, you can (both Admin and forms).
(definitely) :)
I installed djangoappengine 3 months ago and work on it daily under Eclipse (Windows).
If you have some expericence with Django it should be easy, I faced much more problems with Eclipse integration, but nothing unfeseable (even for a newbie - as I'm still).
You just have to start from here:
http://www.allbuttonspressed.com/projects/djangoappengine#installation
Be careful anyway: there are some limitations due to the Datastore capabilities.
A lot of work has been done to circumvent them (dbindexer, specifics decorators...) and if you're planning to develop an app from scratch you will find your way (keeping " noSQL " in mind) but if you plan to migrate a plain vanilla SQL app, it may cause you some pain...
Last point: instances handling Django and all its libraries may be long to start with App Engine ; an issue to consider:
http://code.google.com/p/googleappengine/issues/detail?id=1695
Hope it helps.
Florent

Django on Google App Engine

How much of a pain is it to run a Django App on App Engine? Also, does the Datastore work as-is with Django?
I spent some time trying to answer the same question... it seems to me that the most difficult thing to transfer to GAE are django's models... in the sense that they require various modifications and rethinking, mainly because GAE's backend is not a standard relational DB, but google's BigTable. I found a nice intro to this here:
http://www.youtube.com/watch?v=rRCx9e38yr8
Anyways, it's worth downloading one of those 'patches' and have a go with it!
For me the best solution is the 'app-engine-patch'. I downloaded the sample project and it worked straightaway! (Mind that you need to have GAE's SDK installed separately) A killer-feature for me is the fact that the django-admin and many other classic django functionalities have been ported too!!!
http://code.google.com/p/app-engine-patch/
The documentation is still quite minimal in my opinion, but it's good enough to get you going. It'll help you to skim though the official GAE docs though!
Just Yesterday (depending on your time zone), Google released a new SDK for Python on Appengine that supports django 1.0 out of the box.
You need to use django-nonrel (source).
You will still find loads of issues:
Many2Many relations not supported
Fake joins increase number of queries
App Engine doesn't allow any python lib with socket or C dependencies (sentry, lxml...)
You can try to get early access to CloudSQL.
Otherwise you are not constraint to use App Engine, you can think about using:
Heroku
Gondor
Cheaper and more control with support requirement files like pip.
31.01.2012, Google released App Engine 1.6.2 that supports Django out-of-the box.
App Engine includes version 0.96 of Django out-of-the-box, but it is quite crippled.
App Engine Helper and app-engine-patch supposedly fix this problem to some degree, but I haven't tried either myself.
http://code.google.com/appengine/articles/appengine_helper_for_django.html
http://code.google.com/appengine/articles/app-engine-patch.html
The amount of pain depends on how much existing code you want to reuse. Unfortunately because of the Datastore does not support SQL, you often cannot just take any django-pluggable app and use it on your GAE project.
App-engine-patch http://code.google.com/p/app-engine-patch/ looks to be ahead of the other django helpers in bringing the standard applications (Sites, ContentTypes, Flatpages) over to GAE. I have used app-engine-patch on several gae projects, and once you understand how to port a django-sql model to a django-gae model and converting sql to datastore queries things can be done very quickly - but there is always a learning curve.
appengine-helper tries to bridge the Datastore gap by providing a model so you don't have to change your model superclasses, but I've found that you end up having to change ManyToMany relationships and any sql anyway, so the advantage ends up being minimal. ae-patch has a roadmap to try to provide an ae-datastore backend, but it probably won't happen for a while.
Google has now launched their Cloud SQL storage. That is actually MySQL 5.5 in the cloud. IMO that's a very nice way to migrate your Django app into the cloud. They have a free trial up to June 1, 2013.
If you need some tips how to set up your Django project for Appengine and Cloud SQL I've written a tutorial for that.

Web technology for a first small web project

I'm a C++ developer with basic Python skills. Here's the task, a friend of mine is running a small company and he asked me if I can make a website for him. I have no real deadline so I think it's a perfect opportunity to try sth new and do some web development.
User has to be able to add photos, change texts ect.
Do you think that Django would be an overkill for this kind of project? I have no experience with it. Perhaps I should try to customize some blog engine or Google Sites?
You may be interested in Google App Engine (http://code.google.com/appengine) which recently exhibited a rise in popularity. The application runs on Google's servers, eliminating the need to maintain Apache and worry about up-time. You basically get a Django-based solution with a data store, with an SDK which allows you to conveniently develop an application on your desktop and then upload it to appspot.com for everyone to use.
The documentation is great, and even if you eventually decide not to use it, the tutorial is excellent for getting you up to speed on Python and webapp design. There is also a codelab which contains a simple Wiki example.
If you need to set up quickly a very simple website, Wordpress can be the perfect choice.
Wordpress is born as a blogging platform, but in the newer version you can manage pages, contact form and so on. And you can find good plugins to expand its capabilities.
The administration interface of wordpress is clean and easy to use, the page or article editor is simple and powerful. Add an image in a post or in a page is easy and intuitive as in no other opensource CMS I've seen.
Django is a pretty flexible framework, it tends to scale well both up and down. It may be overkill to have to learn the whole API for just a simple site, but if you're looking to learn something new, and have some time to spare, then it's a fun platform to learn and work from. My suggestion would be to install the API and have a play around with it, read the Django book and see how you get on.
Maybe before diving into Joomla or Django a first step should be working with the technologies in a raw, pure way. Create a simple web page that excutes some server side script (python? php?) that retrieves data from a mySQL database and displays it. Throw in a little javascript too. Just so that you feel comfortable with the bare-bones fundamentals.
Then when you dive into the big frameworks and libraries, they won't seem so magical.
If you're really asking what the best tool for the job is, then you are going to have to give a little more detail than "first small web project." If what you are asking is more along the lines of you want to learn web application development and what you already know is C++ and python so what would be a good web application stack where you can leverage your current skillset, then here are some more suggestions.
Django is pretty cool. Every one has already talked about it here. As mentioned earlier, the google app engine is sort of based on Django.
Also, consider zope which is another python based web application container.
If you wanted to leverage your C++ knowledge instead, then consider Wt.
Why don't you take a look at the hello world examples for all three and decide which one looks the most interesting to you?
There are a multitude of website frameworks and kits that you could go with as opposed to starting development work from the ground up. It really depends on what kind of technology you want to go with, and how comfortable you feel with the language's potential. As mentioned above, there are things like Joomla, and If you want to stick to PhP frameworks, you could also use Drupal, which has a ton of documentation and support, and is relatively easy to understand.
If you want to venture into the Microsoft realm, you could look into DotNetNuke. It too is much like Drupal and Joomla, so it's a nice CMS framework, which you might feel more comfortable with since ASP.Net is based off of a programming language as opposed to a a scripting language, unlike Classic ASP or PhP. If you're going to go the Microsoft route, I also recommend taking a look at their BizSpark developer program - but that's more dependent on how serious your friend is on running his site as a business.
Then you also have a lot of things offered up by Google, such as their charts and visualizations -- which doesn't seems like something you're looking for, but for future reference, or cool little things like a map mashup.
It really depends on how much you're willing to learn and how much time you have and sometimes not having a rough deadline is the worst possible thing that could happen. Naturally everything starts to take longer. By the time you're done, the tech is either out of date, or you've taken so long that the business plan has changed.
using django it is easy, there is already an application for photo albums available at http://code.google.com/p/django-photologue/ it becomes with tagging too and maybe you just need to add some jquery effects to get done your site.
To get this done you just create a django project, add the applications to your settings, configure your urls and templates, and thats it.
Also i f you need a small version you can just use this code as a base of your new app.
have fun with django!!
sergio
Pylons is an excellent Python web framework based on WSGI standard. It has ported many of the features of Ruby on Rails so is great for rapid development.
I've been using it for a few years now combined with SQLAlchemy for my database layer and I've found it perfect for development of all my web sites.
It is easily good enough for production sites too.
The one downside I've found is slight complications getting it deployed on shared hosting but as long as you have shell access to your host, you should be fine.
You may try to install and customize Joomla (http://www.joomla.org/) It's full of stuff, easy to use and easy to customize also.
Everybody reaches for a framework, but, assuming this is running on Apache, why not just server side includes, and, since you have Python experience, Python CGI scripts that emit JSON for use in the UI by Javascript. By going with CGI/SSI you defer your decisions about framework and/or templating system until later, when you have more experience under your belt, but you should be able to get a reasonable amount of re-use of whatever Python code you write.
I'll cast my vote for Drupal (http://www.drupal.org)
I think LOVDbyLess might do exactly what you want. If all you need is basic blog and photo upload and a simple SNS, then check out this Ruby-on-Rails open-source thing. It's been evolving with new features and is pretty easy to set up.