Workflow Post function to reopen parent issue automatically when one of the subtasks is reopened

[E]

I need a script that checks if the parent is closed upon subtask's reopening and if the parent is closed, then reopen parent and have a comment at parent issue "subtask reopened".

Would appreciate any tips. I am just starting with groovy.

Thanks

[Fidel Castro]

An alternative implementation using JIRA Workfow Toolbox: Automatically reopen parent issue when any of its subtasks is reopened

[Indranil Mondal]

can you please explain how does this plugin work for this problem? I have installed the trial version of the plugin and seeing too many fields. I dont know what to do with them to implement it.

[RambanamP]

you can develop post function using script runner plugin, check this

https://jamieechlin.atlassian.net/wiki/display/GRV/Script+Runner

and lots of discussions you can find on this forum, check few

https://answers.atlassian.com/questions/153486/jira-auto-transition-between-parent-and-sub-task

https://answers.atlassian.com/questions/129331/help-with-parent-transitions-upon-sub-tasks-transitioning