Re: [Generateds-discuss] Export of an enumerated string restriction attribute with a default value

[Dave K. <dku...@da...>]

Andrii,

I took a little time for me to find those solutions: (1) the
"--always-export-defaults" command line option and (2)
`use="required"` in the XML schema.

And, now I've had time to test them.  They both seem to work,
depending on what you want them to do.

1. The "--always-export-defaults" command line option affects all
    attributes (and perhaps some other things, too.

2. The `use="required"` in the XML schema can be applied more
    selectively to specific attributes declarations.

I've attached files that you can use to run a test.  You might have
to edit `test.sh` a bit.

Here is the results of running a test:

     $ ./test.sh
     + python generateDS.py -f -o tmp01sup.py test01.xsd
     + python generateDS.py -f -o tmp02sup.py --always-export-default  
test01.xsd
     + python generateDS.py -f -o tmp03sup.py test02.xsd
     + python tmp01sup.py test01.xml
     <?xml version="1.0" ?>
     <collection>
         <item>
             <ident>item01</ident>
         </item>
         <item units="TB">
             <ident>item02</ident>
         </item>
     </collection>
     + python tmp02sup.py test01.xml
     <?xml version="1.0" ?>
     <collection>
         <item units="GB">
             <ident>item01</ident>
         </item>
         <item units="TB">
             <ident>item02</ident>
         </item>
     </collection>
     + python tmp03sup.py test01.xml
     <?xml version="1.0" ?>
     <collection>
         <item units="GB">
             <ident>item01</ident>
         </item>
         <item units="TB">
             <ident>item02</ident>
         </item>
     </collection>

Hope this helps.  Let me know when you have more questions.

Dave
Quoting Andrii Iudin <an...@eb...>:

> Dear Dave,
>
> Please could you help with writing out to XML an enumerated string  
> restriction attribute with a default value? It looks like this:
> <xs:attribute default="GB" name="units">
>     <xs:simpleType>
>         <xs:restriction base="xs:string">
>             <xs:enumeration value="TB"/>
>             <xs:enumeration value="GB"/>
>             <xs:enumeration value="MB"/>
>         </xs:restriction>
>     </xs:simpleType>
> </xs:attribute>
>
> When writing out and the value is set to "GB", no units are output  
> into the XML.
>
> It appears that the skip is happening in the following generated logic:
>     def _exportAttributes(self, outfile, level, already_processed,  
> namespaceprefix_='', name_='datasetSizeType'):
>         if self.units != "GB" and 'units' not in already_processed:
>             already_processed.add('units')
>             outfile.write(' units=%s' %  
> (self.gds_encode(self.gds_format_string(quote_attrib(self.units),  
> input_name='units')), ))
>
> At this point in code already_processed is just an empty set().
>
> Is there any switch or change in schema that we might do to ensure  
> "GB" units are added even if the value is the same as the default one?
>
> Many thanks and best regards,
> Andrii
>
>
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-- 
Dave Kuhlman
http://www.davekuhlman.org