[Qgis-user] How to change what fields QGIS layout text tool reads?

[Andreas Neumann]

Hi, 

What expression did you use? 

Here are some ideas what you could do: 

 	* get_feature() / get_feature_by_id() and attribute() - here you need
some logic how to retrieve the related feature from the other layer
 	* relation_aggregate() - allows you to have more than one match in the
other layer and create aggregates
 	* joins on layer properties - for 1:1 joins - needs to be done on
layer properties

If you clarify more specifically what you want to do, we can more easily
help. 

Also, if you have your expressions to share that you tried, it would
help. 

Greetings, 

Andreas 

On 2019-06-26 09:06, Ville Koivisto wrote:

>> 

> HI LIST, 
> 
> I'm trying to add several texts to my layout and configure their contents by an expression. The problem is that the fields that expression dialog offers me under _fields and values _are from one certain layer and I need them from another one. I'm struggling to find a way to fetch fields from two other layers participating in the layout. 
> 
> If I try to use their fields in an expression I get: 
> 
> _Eval error: Column "Field" not found_ 
> 
> _ _ 
> 
> How to solve this? Thank you for your attention. 
> 
> BEST REGARDS, 
> 
> Ville Koivisto 
> 
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