[Qgis-developer] NULL handling and numeric data types

Matthias Kuhn matthias.kuhn at gmx.ch
Wed Sep 24 08:13:22 PDT 2014


Just implemented it for text edit (when using QgsFilterLineEdit or
QLineEdit). [1]

Please let me know if it works and if you are missing it in other places
as well.

Matthias

[1]
https://github.com/qgis/QGIS/commit/3f8a860503c78689c981234f874771f8b1277c97

On 24.09.2014 16:59, Matthias Kuhn wrote:
> Hi Andreas,
>
> I think we can. It should be quite easy. Let me give it a try.
>
> Matthias
>
> On 24.09.2014 16:51, Andreas Neumann wrote:
>> Hi,
>>
>> I frequently have data with NULL values and still have problems with
>> QGIS correctly handling them.
>>
>> While QGIS displays NULL values of text types correctly as NULL, NULL
>> values of numeric data types (e.g. smallint, double, numeric) just
>> display as an empty string. I would rather like to see NULL instead of
>> the empty string in the widget.
>>
>> Can we do something about that so that NULL values are correctly
>> displayed as NULL also for numeric data types?
>>
>> QGIS server even displays numeric values with NULL values as "0" instead
>> of "NULL" - which is wrong in my opinion. It is misleading as 0 and NULL
>> are not the same.
>>
>> My data is in Postgis and I tested both with 2.4 and current master.
>>
>> Thanks,
>> Andreas
>>
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