Bootstrap – The hidden gem in Turbogears

I’ve been trying to tidy up my Mako templates within my Turbogears 2 project.  As part of that I was looking at some of them that are quickstarted including one which is the About page.

What was curious was there was all this CSS work all done already for you, including icons.  Digging further I found out that one of the many projects Turbogears takes in, is Bootstrap.  It’s website describes Bootstrap as “Sleek, intuitive, and powerful front-end framework for faster and easier web development.”  but what it means to me is a bunch of guys who understand HTML and CSS way better than me have made it easy for me to build a decent web application.

While the framework won’t suit everyone’s tastes, it makes a lot of the formatting decisions so much easier.  The thing is, in all the Turbogears documentation I have read I’ve not heard it mentioned. Not sure why, its pretty awesome (not SQLAlchemy awesome but not many things are).

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Pre-selecting ToscaWidgets jqgrid values in TurboGears

My Turbogears project has recently reached an important milestone; one of the back-end processes now runs pretty much continuously and the plugins it use (or at least the ones I can see) are also working.  That means I can turn to the front-end which displays the data the back-end collected.

For some of the data I am using a ToscaWidgets (or TW2) widget called a jqGridWidget which is a very nice jquery device that separates the presentation and data using a json query.  I’ve mentioned previously about how to get a jqGridWidget working but left the pre-filtering out until now.  This meant that my grid showed all the items in the database, not just the ones I wanted to see, but it was a start.

Now this widget displays things called Attributes which are basically children of another model called Hosts. Basically, Attributes are things you want to check or track about a Host.  My widget used to show all Attributes but often on a Host screen, I want to see its hosts only. So, this is how I got my widget to behave; I’m not sure this is THE CORRECT way of doing it, but it does work.

First, in the Hosts controller you need to create the widget and pass along the host_id that the controller has obtained.  I was not able to use the sub-classing trick you see in some TW2 documentation but actually make a widget instance.

class HostsController(BaseController):
    # other stuff here
    class por2(portlets.Portlet):
        title = 'Host Attributes'
        widget = AttributeGrid()
        widget.host_id = host_id

Next, the prepare() method in the Widget needs to get hold of the host_id and put it into the postData list.  I needed to do it before calling super() because the options become one long string in the sub-class.

class AttributeGrid(jqgrid.jqGridWidget):
    def prepare(self, **kw):
        if self.host_id is not None:
            self.options['postData'] = {'hostid': self.host_id}
        super(AttributeGrid, self).prepare()

This means the jqgrid when it asks for its JSON data will include the hostid parameter as well.  We need that method to “see” the host ID so we can filter the database access.

Finally in the JSON method for the Attribute we pick up and filter on the hostid.

    @expose('json')
    @validate(validators={'hostid':validators.Int()})
    def jqsumdata(self, hostid=0, page=1, rows=1, *args, **kw):
        conditions = []
        if hostid > 0:
            conditions.append(model.Attribute.host_id == hostid)
        attributes =model.DBSession.query(model.Attribute).filter(and_(*conditions))

From there you run through the attributes variable and build your JSON reply.

 

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procps 3.3.6 and Mudlet 2.0

Mudlet - Graphical MUD clientYesterday was a busy Debian day for me with the release of not one but two packages.

procps

procps version 3.3.6 was released both as an upstream and a Debian package.  While there were many bug fixes in this release, the main new feature for it was the top inspect feature.

The top inspect feature allows you to run top in the normal way then you can inspect a specific process you have selected within top for more information.  Examples of this include fuser or lsof type output to see what files or libraries are open but really the limit is how clever the operator is and how often you would need this information.  Even scripts can be run off this feature if you have some customised or cooked output you need to see.  Once the output is there, you can search for text.

There will be a small hold-up with the Debian packages as the section for the  library has been moved to libs, where it should be. At least I think that’s why there is a delay.

procps infrastructure

procps currently has only an email list and a gitorious git repository.  While this works most of the time, there are two main problems with this setup.

The first is that the only two ways you can report bugs is send an email to the list or create a git merge request. The email has the problem with tracking and gathering history while the git sets the bar pretty high for reporting something has gone wrong.

Second problem is there is no tarball file repository.  gitorious does have the feature of downloading tarballs of the tag checkpoints, but this is the raw repository.  When you make a tarball with “make dist” there are some generated files included in the tarball that don’t appear in the gitorious ones, which means its not a simple for some as you expect.

So I’ll be creating a project for these two features soon.  Not sure where they will be but I use sourceforge for both these for a few other projects so that might be where they end up.

 

Mudlet

Mudlet, the multi-user dungeon or MUD client, has finally made it to version 2.0!  It looks a lot more stable and polished at least from the scripting side than the previous RC versions but has all the features that we’ve come to expect with it.  The most important thing is that the developers have finally put a line in the sand and said “this is version 2.0”.  The Debian package was uploaded yesterday and should be on its way to your local mirror soon.

 

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