QField - display of entries for 1:n relationships

Question

I'm working on a QField project where I've defined 1:n relationships between points/polygons and tables. The relationship itself works fine, and the information is recorded in the tables as planned however the entries in the QField interface look unspecific - there are only rows with zeroes like shown the picture below.

How do I need to adjust the settings that the name of a specific field is shown in this field?

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I tried different settings in the display properties without any changes in the appearance of this field.

Answer 1

You need to configure Display name in Display properties in Layer properties (https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/vector_properties.html#display-properties).

Answer 2

Facing the same problem, I came along the following solution:

As @BlackTesta stated, you need to configure Display Name in Display properties (https://docs.qgis.org/3.34/en/docs/user_manual/working_with_vector/vector_properties.html#display-properties)

The key function you need to use is relation_aggregate().

Since at least for me, the help-documentation didn’t provide an example for all the arguments I needed, I present you my expression:

relation_aggregate(    
relation:='name_of_relation',    
aggregate:='concatenate',    
expression:=concat("Field1",': ',"Field2" ),    
concatenator:='\n',    
order_by:=concat("Field1"+"Field3"))

In my example, the concatenator '\n' creates a new line for every related object (which you only see in QField, but not in QGis).

I was also happy to find out that one can even concat several fields for sorting the values (order_by).