[QGIS-Developer] Run processing model on selected features only
nirvn.asia at gmail.com
Mon Dec 11 23:23:44 PST 2017
You could also use is_selected() it your refactor fields' expressions.
if( is_selected(), <new value>, <retain old value>)
On Mon, Dec 11, 2017 at 9:37 PM, Andreas Neumann <a.neumann at carto.net>
> Hi Mathieu,
> If I run "Save selected features" before the rest of my model I also loose
> the whole context of widgets and relations, because it is a new virgin
> layer then with no link to the original layer configuration (widgets,
> relations) - right?
> Thanks for your reply,
> On 2017-12-11 15:15, Mathieu Pellerin wrote:
> You could use the "save selected features" algorithm in your model against
> the vector layer input.
> On Dec 11, 2017 21:10, "Andreas Neumann" <a.neumann at carto.net> wrote:
>> Hi Mathieu,
>> Thanks for the information. Unfortunately I cannot use "Feature Source"
>> as an input in my model.
>> Matthias told me that I have to use "Vector layer" as an input, because
>> my model relies on certain features that aren't available on "feature
>> source" inputs. I need to use refactor fields in a model with expressions
>> support for relation_aggregates and represent_value (which requires
>> information on widget configuration).
>> Is there any chance this checkbox could also be introduced for "Vector
>> layer" inputs? Should I open an issue?
>> I also find it quite confusing that the inputs come with zero
>> documentation. I think for probably 99% of the users who are not devs it
>> isn't obvious when to use which input. Could we introduce a very simple
>> tooltip that explains with 1 or 2 sentences what the input implies - esp.
>> for the "Vector layer" vs. "Feature Source" vs. "Layer field" ?
>> On 2017-12-11 15:01, Mathieu Pellerin wrote:
>> The global use only selected features option is gone (yay) in favor of a
>> checkbox which can be activated on a per-use basis. I believe iterating
>> through selected features only requires a vector source input.
>> On Dec 11, 2017 20:57, "Andreas Neumann" <a.neumann at carto.net> wrote:
>>> In QGIS master (version 3), with a Vector Layer input, I am failing to
>>> find the option to run a processing model only on the selected features.
>>> Can you please help me find the setting? I looked in the "Options" -->
>>> "Settings" --> "Processing" or watched out for a checkbox in the "Run model
>>> dialog" - but both did not show an option to restrict on selected features
>>> Thanks for a hint,
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