I haven’t written to the blog in a while. Quite frankly, I’ve been busy. In the last 30 days, I have released 3 software new packages, updated 1, deprecated 1, participated in a sprint that lasted a virtual 2 weeks, closed countless tickets, and pushed forward TG2 functionality.
TG2b4 was released last Saturday. This was mostly a bug-fix release, but b3 is where the new functionality really came into the scene. TG2b3 is the first build to include Sprox, a new library for schema-generated widget generation. Sprox is the offspring of DBSprockets. I decided I liked the declarative part of DBSprockets so much I wanted to spin it off as it’s own entity. Sprox looses DBSprocket’s table-based dependency, utilizing the mapping provided by SQLAlchemy. I realized that much of DBSprocket’s code was doing precisely what SQLSoup was designed to do, and decided to focus my efforts on making and extremely configurable widget base. The result was a considerable removal of the cruft that was associated with DBSprockets. Sprox releases with an excellent documentation base provided by Sphinx.
There has been a bit of resistance to Sprox, people were/are confused/upset about my providing yet more options for schema based widget generation. The fact is I have yet to find anything that performs as well as Sprox from a developer/speed standpoint, and I needed to provide our TurboGears user base with a better way to administrate their site, and also allow them to use that tool component-wise in their system. I think this method for developing widgets is well done in other frameworks, and we need a solid answer to this problem. Sprox is just that.
The next step was to re-work Catwalk to use Sprox. This took a little effort, and I put in RESTful URLs while I was at it, but struggled with making the URLs work within TG2’s dispatch system. The result was as close to REST as you can get without conforming to a set standard.
The result of hacking REST into Catwalk got me thinking, and I decided to implement content-type dispatch as well as RESTful dipatch in TG2. I went back for another round on Catwalk, and converted it over to the standard.
I’ve also been toying around with Dojo at NREL. I’m pretty much done with ExtJS due to licensing issues, a not-so-hot codebase, and weak support from IRC. It’s bad when you go on to ask a question on the channel as a 6 month-user of a software project and end up spending all your time answering everyone else’s questions (as the most experienced person in the room). Something must be said for an organization that does not push paid consulting as a primary focus on their website… #dojo has been an exceptional resource for getting my work done. Those guys know their software, and lend a great hand to help you with it.
Back to the topic at hand… I was able to shoe-horn Dojo into Sprox with little effort, and implemented DojoCatwalk, which worked, but was ultimately not what I wanted. What I really wanted was configurability. I started work on tgext.admin, which was supposed to provide enough functionality to replace tgcrud, a command to auto-create crud in your own TG application. To support tgext.admin, I created a new package called tgext.crud, which provided a CrudRestController, which is a simple way of providing crud for any object in your model. AdminController combines this functionality with that of Mark’s lookup code to provide a fast, configurable set of tables/forms/etc for all objects in your model. AdminController takes a declarative AdminConfig as input which provides a consistent way to create your administrative toolset. Did I mention it does Dojo tables with ajax loading? Yeah.
I’m not done with this binge yet. Catwalk is going to mutate one more time before I’m through with it. It is going to become a default-configured AdminController specifically designed to work within the context of a quickstarted TG2 application. I had one blocker ticket which was solved last weekend, so it’s time to get Catwalk good and finished.
Tags: Dojo, Python, Sprox, tgext, Turbogears
Really great work!
Wondering if you had used jquery? I have not done a lot with the ui stuff yet but I have found the other parts of the framework very usable. The product I used Dojo for I am not sure I could use jquery ui at the time it was built but I found Dojo heavy and a lot more typing than jquery.
Sprox is excellent. There should be no resistance. In minutes you can write an admin interface with all the dirty work done by Sprox
thanks for all your hard work.
@Lateef Jackson
I have been grappling with what library to use for this. The real answer is that Sprox will work with any JS library, and there is currently interest in making it work with both ExtJS and Mootools. Anyone interested in supporting jQuery is hereby encouraged to step forward. I did play with JQuery this summer, since my GSoC student did a few widgets for his project using it. I like jQuery, definitely, but I think the table support needs a bit of work before it is ready for Sprox. I think Dojo has a really great code base, and I think the concerns of it’s heft can be addressed by making custom builds. Here is a great article on some of Dojo’s Myths: http://www.sitepen.com/blog/2008/10/27/debunking-dojo-toolkit-myths/.
@dazzawazza
Thanks for the support.
@all
If anyone has questions, head over to #turbogears on irc.freenode.net, and chat me up.
Awesome work Chris! I really appreciate all the new stuff you are getting into TG and I’ll love to see sprox grow, keep up the good work and I’ll join you soon TM.
re, extjs I totally agree. Oh my it seems I’m starting to get good at it because the same thing has happen to be before.
PS: we need to get you a nicer wordpress theme
Thank you for your hard work.
Sounds really good, and certainly be of TG2’s “spotlight” features.
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