[Qgis-user] troubles with QGis Atlas

[didier peeters]

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 ?

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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