[Qgis-developer] refresh joined layers cache through python

[Rouzaud Denis]

Hi,

There is a PR open for this
https://github.com/qgis/QGIS/pull/771 <https://github.com/qgis/QGIS/pull/771>

Open for quite a long time though.

Denis


> On 08 Mar 2015, at 18:54, Olivier Dalang <olivier.dalang at gmail.com> wrote:
> 
> Dear List,
> 
> I'm posting this to qgis-dev since I got no answer on qgis-user and it's a bit technical.
> 
> 
> I'm using layers joins in my projects, and need to use the memory cache for performance reasons.
> 
> This means that when I'm making changes on the joined layers, they won't appear on the base layer until the project is reloaded.
> 
> Is there a way to trigger a refresh of the joined layer cache "manually" through python ?
> 
> I looked at the API, but didn't find how to do so...
> 
> I found this class : QgsVectorLayerJoinBuffer which has a createJoinCaches method, but I couldn't find how to get a reference to it from the VectorLayer.
> 
> There's also the createJoinCaches method of QgsVectorLayer, but it seem it has no effect if the cache was already created (and that's what the docstring says as well).
> 
> If there's no way to do it, does anyone have a workaround, hopefully a bit lighter than reloading the project ?
>  
> Thanks a lot !
> 
> Olivier
> 
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