[Qgis-user] QGIS 2.16 Form View and Field Calculator Buggy?

[DelazJ]

Hi,


2016-07-24 10:59 GMT+02:00 Lene Fischer <lfi at ign.ku.dk>:

> Hi Kory,
>
>
> Field calculator :
> It works fine here - If you select a feature - and update - please
> remember the toggle for 'Only update selected feature'
> So if you have selected one feature and then updated.
> Also remember - that a calculation is only values at that moment. It is
> not a dynamic calculation. You have to update if you move your feature.
>
> And to complete Lene's answer, if you want the value to be live-updated,
you might use virtual field
<http://docs.qgis.org/2.14/en/docs/user_manual/working_with_vector/attribute_table.html#editing-attribute-values>

Harrissou

Regards
> Lene Fischer
>
>
>
>
>
> -----Oprindelig meddelelse-----
> Fra: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] På vegne af
> Kory Roberts
> Sendt: 24. juli 2016 10:18
> Til: qgis-user at lists.osgeo.org
> Emne: [Qgis-user] QGIS 2.16 Form View and Field Calculator Buggy?
>
> I'm running into all kinds of seemingly buggy behaviors with the form view
> and field calculator on QGIS 2.16.  Here are some actions and results:
>
> FORM VIEW
> 1) Start a fresh QGIS project.
> 2) Create a new point Shapefile layer.
> 3) Add a new field "test_num" as a decimal number and "text_txt" as text
> data.
> 4) Toggle edit mode and add a point.  Give id as "1", others as NULL.
> 5) Save layer edits.
> 6) Open attribute table in table view and enter some text in "text_txt".
> 7) Switch to form view.
> ---- BUG 1?: "text_txt" displays NULL instead the text.  Clicking around
> and even saving does not seem to refresh the view.  The only thing that
> seems to work is to click off of the item in column preview and then select
> it again.
> 8) In form view, open field calculator.
> 9) Select update existing field and "text_num".
> 10) Enter a number in the expression space and click OK.
> ---- BUG 2?: "text_num" displays no change.
>
> FIELD CALCULATOR
> 11) Add another point to the canvas.
> 12) Save edits.
> 13) Open field calculator.
> 14) Enter "$x" in the expression space and check the output preview.
> 15) Select the other point.
> 16) Recheck the value for "$x"...It's the same as before.
> ---- BUG 3?: This might be me misunderstanding how these variables work,
> but I thought $x and $y should change depending on the current feature
> selected or being edited?  In an actual work layer with many points, I keep
> getting the same values for $x and $y regardless of what I try.
>
> Trying similar actions to bug hunt has resulted in at least 2
> freezes/crashes of QGIS along the way, too.
>
> ~Kory
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