cubicweb #3244054 support constraints on EntityType [open]
My current use case, given:
class rel_1(RelationDefinition): subject = ('A', 'B') object = 'C' cardinality = '?*' # cannot put '1*' class rel_2(RelationDefinition): subject = 'A' object = 'B'
I'd like to express a constraint saying that:
hence ensuring that there's always a link (direct or indirect) between A and C, through the rel_1 relation, before creating A.
class A(EntityType): ... constraints = [RQLConstraint('X rel_1 Y OR (X rel_2 Z, Z rel_1 Y)')]
|done in||<not specified>|
|closed by||<not specified>|