[Qgis-user] troubles with QGis Atlas

[Nyall Dawson]

On 12 Jan 2016 8:36 AM, "didier peeters" <dpeeter1 at ulb.ac.be> wrote:
>
> Thank you Nyall.
>
> Oh, this could be the reason.  To clarify a little bit, my field is not
called « id » and my coverage layer is a Postgis table, the field I use has
a PK and the geometry layer is a Postgis view with numerical values that I
represent with proportional circles.
> Does it mean that what I want to do is not possible ?  Or should I use
another data source ?

It should be possible. Can you share a few rows from both tables?

Nyall

>
> Didier
>
>
> > Le 11 janv. 2016 à 21:26, Nyall Dawson <nyall.dawson at gmail.com> a écrit
:
> >
> > On 12 January 2016 at 02:18, didier peeters <dpeeter1 at ulb.ac.be> wrote:
> >> Hello,
> >>
> >> I’ve started to use the Atlas in QGis composer: I use a non-geometry
table
> >> as coverage layer, providing the feature id’s and corresponding labels
for
> >> my maps, and I display always the same extent but with different data
of
> >> course, using a rule-based style like ‘ "field" = @atlas_featureid'.
At
> >> first it worked fine but now, the atlas mistakes @atlas_featurenumber
for
> >> @atlas_featureid, i.e. instead of displaying the data corresponding to
the
> >> feature id it displays the data corresponding to the number of the
feature
> >> (~ the row number, as some are filtered out), but selects properly the
> >> labels corresponding to the feature value.  So I obtain maps with a
title
> >> which is not related to the content !
> >> In the expression editor @atlas_featureid and @atlas_featurenumber are
> >> previewed with the same Current value although they are different !
> >>
> >> Does anyone have an idea about this ?
> >
> > Keep in mind that feature id's might not be predictable, depending on
> > your data source. They aren't user visible, and as such aren't
> > suitable for a join like this.
> >
> > Did you mean instead to use a field called "id" from your coverage
layer?
> >
> > Nyall
> >
> >>
> >> I use QGis 2.12.1 on Mac.
> >>
> >> Didier
> >>
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