Re: [Gusdev-gusdev] perl object layer:::

[Steve F. <st...@pc...>]

Michael-

see below.

Steve

MICHAEL LUCHTAN wrote:

>Hello all:
>A couple of q's for the FAQ:
>I'm trying to get started using the perl object layer.  I wonder if anyone
>has any documentation, like a short description of the object, followed be
>the methods that are available, and the parameters required by each
>method.  I can't seem to find this sort of documentation anywhere.  Where
>can I find this type of documentation?
>
There isn't any up-to-date documentation.  The (perl) object layer 
consists of five pieces:
  - core classes that represent a: database, database handle, database 
table database row.  These utilize the Perl DBI package.  Find these in 
$PROJECT_HOME/GUS/ObjRelP/lib/perl
  - objects that represent each GUS table and view, and rows in them. 
 Their API is pretty simple: setters and getters for attributes, get/add 
child methods; get/set parent methods.   Find these in 
$PROJECT_HOME/GUS/Model/lib/perl/*/.  
  - a superclass for all row objects.  Look here to find methods that 
are shared by all row objects.  It is: 
$PROJECT_HOME/GUS/Model/lib/perl/GusRow.pm
  - a code generator that automatically generates the GUS table and row 
objects by reading the info in the TableInfo table.  Find this in  Find 
these in $PROJECT_HOME/GUS/ObjRelP/lib/perl/generator
  - "hand-edited" objects:  these augment the automatically generated 
methods with advanced "business logic".  Find these in 
$PROJECT_HOME/GUS/Model/lib/perl/DoTS/*.pm.man

>
>Much of the code that I have seen used on the web makes use of perl
>objects from GUS2 code.  Is there a reason that
>Objects::dbiperl_utils::DbiDatabase is used instead of
>GUS::ObjRelP::DbiDatabase?
>  
>
Yes,  that was the old location of DbiDatabase in gus2 code.  It has 
been repackaged into GUS::ObjRelP::DbiDatabase to conform to the new Gus 
3 cvs structure, etc.

>Does anyone have a simple 5-10 line example code for how to login to a
>database and submit a query, printing the results?
>  
>
For basic queries, with no associated logic, we use sqlplus on the unix 
command line.  
To see how to do something like this in a script, look at 
$PROJECT_HOME/GUS/Common/bin/dumpSequencesFromTable.pl.  It issues an 
SQL query directly, not using the object layer.  To see the object layer 
in action, take a look at plugins.  

>Thanks in advance:
>
>Michael Luchtan
>http://www.cs.uga.edu/~luchtan
>
>
>
>
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