Automatic building of parent once child is build

Some user requires the successful build of the child project immediately after Build and Release of parent project , without following : - build the parent project before building the child project .

The steps are :
1. The parent project is build and released .
2. Then from project group summary page - build the child project .. It shows the error -

[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).

Project ID: null:training-core:jar:null

Reason: Cannot find parent: sample.project:training for project: null:training-core:jar:null for project null:training-core:jar:null