[QGIS-Developer] Question on @atlas_featureid

[Andreas Neumann]

Hi,

I haven't worked on an Atlas for a while, now again in QGIS 3.16.

I was surprised to see that @atlas_featureid is not equal to the primary 
key of the atlas coverage layer.

Is this expected or a bug? I know, I can access the primary key through 
attribute(@atlas_feature,'pkey_name'), but it is a little more 
complicated than @atlas_featureid - and I'm pretty sure that 
@atlas_featureid was using the pkey column in th past?

My data source for the atlas coverage layer is a Postgis View.

Thanks if you have any info on this issue,

Andreas
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