I try to increase lenght field "Description" from 250 to 1000 (for example) on administration module for some class. CMDBuild apply my changes. But when I enter (on management module) string bigger that 250 letters I get an error.
And when I press "Clear cache" in Server management menu lenght field "Description" reset to 250 letters value.
The attribute “Description” is inherited from “Class”, then you should operate directly on the Postgres database by changing the length of “Class”.“Description”.
The solution that we recommend, which is less risky, is to use the “Description” as a short description and add in your class an additional attribute “ExtendedDescription” of type text.
CMDBuild Team