Read only attributes

Hello,

I am a beginner in Documentum and I am just making some tests with custom types, relation types, taking into account client requirements. One of this requirements is that we must have objects with read.only attributes. I have created a new type with an attribute marked as read-only and with a default value. If I try to change the attribute value from DFS, I can modify the value programmatically. If I try to do it from Webtop it is not possible to change the value. Why am I able to modify it from DFS if the attribute is read only? Is there any way from DFS to not modify read-only attribute values?

I am also testing relation types,Is it possible to define attributes for a new relation type, I haven't seen the option in composer.

Thank you very much

Javier Martinez

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Comments

prabhu

Are you using super user session in DFS to modify the attributes ??

javinott

Yes, I am using superuser to make the tests. Could it be a matter with permissions?

mszurap

Hi,

Read-only option for an attribute is only for well-behaving applications (like Webtop), so it is up to the application whether it allows the modification of the attribute or not. You cannot restrict the modification of an attribute - because then you could never fill it's value.

If you need to simulate a "Write-once Read-many" functionality, then you could create a TBO for your object type and throw an exception on the onSave method if the old value wasn't empty. But this won't help by default for Webtop, as it would always show the attribute as read-only or as non-read-only (of course you can customize the attributes component to achive it).

In theory you can add a new attribute for a relation type, I think it's a known limitation to Composer that it does not allow it right now.

prabhu

OK. It has nothing to do with permissions. Also it looks like even IDfValidator doesnt catch this.

One possible solution is you can check if the attribute is read-only or not and then set the value for the attribute.

You may get the information by quering "read_only" attribute from "dmi_dd_attr_info" table.

javinott

Hi all,

Thank you for your responses