QGIS » QGIS Application

When a domain like this is defined in the public schema:

CREATE DOMAIN public.farbdomain
AS text
COLLATE pg_catalog."default"
CONSTRAINT domainconstraint CHECK (VALUE = ANY (ARRAY['rot'::text, 'geld'::text, 'blau'::text]));
ALTER DOMAIN public.farbdomain
OWNER TO postgres;

And it's defined for a column in no matter what schema:
CREATE TABLE boekat.farben
(
id integer NOT NULL,
farbe farbdomain,
geom geometry(Geometry,25832),
CONSTRAINT farben_pkey PRIMARY KEY (id)
)

We can select a column with the type farbdomain it as an enumeration drop down in the attribute form.

But when the domain is not in public schema, enumeration as a widget type is not available and it appears as text.