[Qgis-user] How to set field alias expression in PyQGIS ?

[Yann Voté]

Hi list,

I'm stuck at configuring field alias expressions programmatically, 
didn't found helplful documentation, so any help would be appreciated.

What I want is the field label in form to looks like "Code (last used: 
XXX)" where XXX is, well, the last used code. And this is easily done in 
GUI, in the layer properties, form tab (feature introduced in 3.14).

But I want to do it programmatically in PyQGIS. What I tried so far is 
the following two lines

 >>> prop = QgsProperty.fromExpression("format('Code (last used: %1)', 
maximum(code))", isActive=True)
 >>> 
layer.editFormConfig().dataDefinedFieldProperties('code').setProperty(QgsEditFormConfig.Alias, 
prop)

But then the following command

 >>> 
layer.editFormConfig().dataDefinedFieldProperties('wetland_code').hasProperty(QgsEditFormConfig.Alias)

still returns False.

What am I missing ?

Thx a lot!

-- 
Yann Voté - ygversil at lilo.org