[mapguide-users] Services API: 'SelectFeatures' can't accept null properties?

[Mauricio Villablanca]

The same issue happens in Mapguide Enterprise 2009 and I hope it will be
fixed soon. I work with a database that has a lot of null attributes and
querying data by attribute is unreliable.


Jackie Ng wrote:
> 
> 
> I believe it is because the MgFeatureReader now throws exceptions when
> accessing null values and that the http handler hasn't been updated to
> check
> for nulls first.
> 
> I've already made a ticket for this issue here:
> 
> http://trac.osgeo.org/mapguide/ticket/708
> 
> - Jackie
> 
> 
> Carl wrote:
>> 
>> I tried Services API 'SelectFeatures' of 'Feature' on
>> http://localhost/MapGuide/mapagent/index.html.
>> 
>> fill the Resource id with a MS SQL Server 2008 feature source
>>     the Class name with a table name
>> and left other field as default.
>> 
>> the return is as follows:
>> 
>> Value for Prj_SpatialData property is null.
>> Value for Prj_SpatialData property is null. Exception occurred in method
>> MgNullableProperty.CheckNull at line 73 in file
>> d:\buildforgeprojects\mapguide_open_source_v2.0\build_23.8\mgdev\common\foundation\Data/NullableProperty.cpp
>> 
>> Prj_SpatialData is of nullable varchar(MAX) field.
>> 
>> When I manually update Prj_SpatialData='', OK, no error messages shown.
>> 
>> I tried several tables. Once one table contains a row with null field
>> value, the above message will be shown.
>> 
>> It seems SelectFeatures can't accept the null field value. If so, is it a
>> bug?
>> 
> 
> 
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> 
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