An interesting question came up today in the OTN JDev forum. The use case is to use an af:query component to qurey a db table, but make some of the attributes available in the table invisible in the query panel.
You can archive this using viewCriteria, but in this case you still can reach the other attributes in advanced mode.
The way to go is to make the attribute which you want to hidenot queryable in the view definition. For this we open the VO and select the attribute node.
Queryable Attribute in a VO
Here we remove the check mark from the ‘Queryable’ checkbox like I did for the JobId attribute in the picture below
Not queryable attribute in a VO
Now when we use this VO in a af:query component we see all queryable attributes but not the ones where we removed the check box. In the sample I removed the checkmark for JobId, ManagerId and DepartmentId in the EmployeesView. The resulting query panel which I build using the ‘All Queriable Attributes’ from the ‘Names Criteria’ section of the EmployeesView
Build Query Panel
looks like the picture below in the running application. As you can see JobId, ManagerId and DepartmentId are not part of the query panel but can be seen the result table.
Query Panel
In advanced mode you can’t add the missing attributes
Query Panel Advanced Mode
You can remove the checkbox from the EO too, but this would mean that no VO build on this EO can query the attributes. If you only remove the checkbox in the VO you can build an other VO based on the same EO and make all attributes queriable.
You can download the sample workspace, build with JDev 11.1.2.1.0 and depending on hte HR db schema, from here: BlogCascadingTable.zip
Please rename the file to ‘.zip’ after downloading it!
Timo Hahn
