webware-discuss

Re: [Webware-discuss] PSP interface to middlekit videos application (sorry about crazy html message)

[Geoffrey T. <gta...@na...>]

At 02:18 PM 1/8/02 +0000, McDonald, Ross wrote:
>Sorry about the garbled message, I think its to do with hotmail and slow
>internet connection.
>Anyway, the gist of it was, are their any examples lying about of good
>practices to employ in psp pages where we seek to separate content from
>presentation, and are their any sample pages of the type where we connect to
>a middlekit layer and therefore access sql database?

I don't have any samples to refer you to.  But I can at least mention the 
way I separate content from presentation.

I put the methods that provide the "content" into base classes that are 
derived from Page.  Actually I have a whole hierarchy of base classes 
depending on the type of web page.  These base classes are located in a 
separate Python package -- they are not in the context directory.

Then the context contains PSPs which are used to present the content as 
HTML.  This is done by making the PSP inherit from the correct base class 
(see the PSP documentation for details on how to do this) and then the PSP 
utilizes the methods of the base class to fetch the content and format it 
appropriately as HTML.  In this way you can have a very minimal amount of 
Python code in your PSP's -- just a few imports, looping, conditionals, 
calls to formatting functions, etc.


--

- Geoff Talvola
   gta...@Na...

Re: [Webware-discuss] PSP interface to middlekit videos application (sorry about crazy html message)

[Jason H. <ja...@pe...>]

At 02:18 PM 1/8/02 +0000, McDonald, Ross wrote:
>Sorry about the garbled message, I think its to do with hotmail and slow
>internet connection.
>Anyway, the gist of it was, are their any examples lying about of good
>practices to employ in psp pages where we seek to separate content from
>presentation, and are their any sample pages of the type where we connect to
>a middlekit layer and therefore access sql database?

The only samples I've found of using the middlekit from a servlet are 
the MKBrowser source files (part of middlekit itself), located under
Webware/MiddleKit/WebBrowser.  

Hope that helps.

Peace,
Jason

[Webware-discuss] MK Object generation from CSV

[John H. <jho...@to...>]

I've been learning about MiddleKit today and something struck me as peculiar-

the Quickstart says to design your objects in a CSV spreadsheet, and that it
will then generate code. It also says that regenerating the code is often
needed as design changes.

But I might want to add additional methods etc to the objects. Wouldn't that
code be lost in the regeneration? That sounds like it would be kind of a pain.

Is that actually a problem in use of MiddleKit?

John

Re: [Webware-discuss] MK Object generation from CSV

[Ian B. <ia...@co...>]

Each MK object is composed of a generated portion, and a subclass that
you can customize.  You'll notice the subclass (which is just
boilerplate) is very boring, and will not change as you change your
model, so you are safe.  The superclass (named, I think, as *Gen) will
get overwritten, and you should not edit that code.  I think MK places
those generated classes in a different directory.

On Wed, 2002-01-09 at 17:09, John Holland wrote:
> I've been learning about MiddleKit today and something struck me as peculiar-
> 
> the Quickstart says to design your objects in a CSV spreadsheet, and that it
> will then generate code. It also says that regenerating the code is often
> needed as design changes.
> 
> But I might want to add additional methods etc to the objects. Wouldn't that
> code be lost in the regeneration? That sounds like it would be kind of a pain.
> 
> Is that actually a problem in use of MiddleKit?
> 
> John
> 
> _______________________________________________
> Webware-discuss mailing list
> Web...@li...
> https://lists.sourceforge.net/lists/listinfo/webware-discuss
> 

Re: [Webware-discuss] MK Object generation from CSV

[John H. <jho...@to...>]

OK, I've been thinking about this a bit - how does one use inheritance
in this system? Can the CSV file declare an object is a subclass of
another CSV-based object?

On Wed, Jan 09, 2002 at 05:23:03PM -0600, Ian Bicking wrote:
> Each MK object is composed of a generated portion, and a subclass that
> you can customize.  You'll notice the subclass (which is just
> boilerplate) is very boring, and will not change as you change your
> model, so you are safe.  The superclass (named, I think, as *Gen) will
> get overwritten, and you should not edit that code.  I think MK places
> those generated classes in a different directory.
> 
> On Wed, 2002-01-09 at 17:09, John Holland wrote:
> > I've been learning about MiddleKit today and something struck me as peculiar-
> > 
> > the Quickstart says to design your objects in a CSV spreadsheet, and that it
> > will then generate code. It also says that regenerating the code is often
> > needed as design changes.
> > 
> > But I might want to add additional methods etc to the objects. Wouldn't that
> > code be lost in the regeneration? That sounds like it would be kind of a pain.
> > 
> > Is that actually a problem in use of MiddleKit?
> > 
> > John
> > 
> > _______________________________________________
> > Webware-discuss mailing list
> > Web...@li...
> > https://lists.sourceforge.net/lists/listinfo/webware-discuss
> > 
> 
> 
> 
> _______________________________________________
> Webware-discuss mailing list
> Web...@li...
> https://lists.sourceforge.net/lists/listinfo/webware-discuss

Re: [Webware-discuss] MK Object generation from CSV

[John H. <jho...@to...>]

Doh! I just looked at the Quick Start again and saw how it does it.

John

On Wed, Jan 09, 2002 at 07:50:25PM -0500, John Holland wrote:
> OK, I've been thinking about this a bit - how does one use inheritance
> in this system? Can the CSV file declare an object is a subclass of
> another CSV-based object?
> 
> On Wed, Jan 09, 2002 at 05:23:03PM -0600, Ian Bicking wrote:
> > Each MK object is composed of a generated portion, and a subclass that
> > you can customize.  You'll notice the subclass (which is just
> > boilerplate) is very boring, and will not change as you change your
> > model, so you are safe.  The superclass (named, I think, as *Gen) will
> > get overwritten, and you should not edit that code.  I think MK places
> > those generated classes in a different directory.
> > 
> > On Wed, 2002-01-09 at 17:09, John Holland wrote:
> > > I've been learning about MiddleKit today and something struck me as peculiar-
> > > 
> > > the Quickstart says to design your objects in a CSV spreadsheet, and that it
> > > will then generate code. It also says that regenerating the code is often
> > > needed as design changes.
> > > 
> > > But I might want to add additional methods etc to the objects. Wouldn't that
> > > code be lost in the regeneration? That sounds like it would be kind of a pain.
> > > 
> > > Is that actually a problem in use of MiddleKit?
> > > 
> > > John
> > > 
> > > _______________________________________________
> > > Webware-discuss mailing list
> > > Web...@li...
> > > https://lists.sourceforge.net/lists/listinfo/webware-discuss
> > > 
> > 
> > 
> > 
> > _______________________________________________
> > Webware-discuss mailing list
> > Web...@li...
> > https://lists.sourceforge.net/lists/listinfo/webware-discuss
> 
> _______________________________________________
> Webware-discuss mailing list
> Web...@li...
> https://lists.sourceforge.net/lists/listinfo/webware-discuss

[Webware-discuss] trying out MiddleKit

[John H. <jho...@to...>]

I've just started looking at MiddleKit, using Webware 6.0 and the docs that
come with it. I'm trying to do the tutorial bit with the Videos .csv file.
when I run the generate.py, I get errors as shown below. Can anyone help me
get past this?

$ python ~jholland/Webware/MiddleKit/Design/Generate.py --db My
SQL --model Videos
Generating SQL...
Traceback (most recent call last):
  File "/home/jholland/Webware/MiddleKit/Design/Generate.py", line 150, in ?
      Generate().main(sys.argv)
        File "/home/jholland/Webware/MiddleKit/Design/Generate.py", line 81,
in main
    outdir=os.path.join(outdir, 'GeneratedSQL'))
      File "/home/jholland/Webware/MiddleKit/Design/Generate.py", line 146,
in generate
    generator.generate(outdir)
      File "/home/jholland/Webware/MiddleKit/Design/SQLGenerator.py", line
59, in generate
    self._model.writeInsertSamplesSQL(self, dirname)
      File "/home/jholland/Webware/MiddleKit/Design/SQLGenerator.py", line
95, in writeInsertSamplesSQ
L
    self.writeInsertSamplesSQLForLines(lines, generator, file)
      File "/home/jholland/Webware/MiddleKit/Design/SQLGenerator.py", line
113, in writeInsertSamplesS
QLForLines
    klass = self.klass(tableName)
      File "/home/jholland/Webware/MiddleKit/Core/Model.py", line 69, in klass
          return self._klasses[name]
	    File "/usr/local/lib/python2.1/UserDict.py", line 14, in __getitem__
	        def __getitem__(self, key): return self.data[key]
		KeyError: Thing
		
		

Re: [Webware-discuss] trying out MiddleKit

[Jason H. <ja...@pe...>]

On Wed, 2002-01-09 at 11:00, John Holland wrote:
> I've just started looking at MiddleKit, using Webware 6.0 and the docs that
> come with it. I'm trying to do the tutorial bit with the Videos .csv file.
> when I run the generate.py, I get errors as shown below. Can anyone help me
> get past this?

<snip>

>           return self._klasses[name]
> 	    File "/usr/local/lib/python2.1/UserDict.py", line 14, in __getitem__
> 	        def __getitem__(self, key): return self.data[key]
> 		KeyError: Thing

I'm pretty sure that the problem lies in the Samples.csv file, because
if you're using the one from MiddleKit/Resources/Template.mkmodel, it doesn't
match up with the schema as described in the tutorial.  You can either fix it 
or mv it out of the way, and then generate again.

Cheers,
Jason