cubicweb #636936 read_permission relation should not be mandatory [resolved]

Description

We should be able to define Entity / Relation without a read permission (for use w/ internal session only). It's currently not possible because of the read_permission cardinality.

Error

ValidationError: 1749 (read_permission): at least one relation can be read by is required on Entity type (1749

ValidationError: 1740 (read_permission): at least one relation can be read by is required on Relation type (1740)

priorityimportant
typebug
done in3.6.0
load0.100
load left0.000
closed by<not specified>