How do I view all Sub-Tasks of all Stories with a particular custom field?

[Chris]

Hello,

I have a custom field (dropdown) where all Stories must be assigned a value:
  Dropdown: Story Type 
    1. UI
    2. Back-end
    3. Miscellaneous

I'd like a Quick Filter where I can click "UI" and it'll show all Stories and Sub-Tasks that have the "UI" field selected. Sub-Tasks don't get assigned the "Story Type", so the regular JQL query will only display all of the Stories with "UI" and none of the Sub-Tasks are shown.

This is the JQL query that I'm using that shows no Sub-Tasks because none of the Sub-Tasks use the "Story Type" dropdown:
    IAM Story Type" = UI

How do I have a JQL query show all Sub-Tasks of a parent Story filter?

(I cannot afford the $750 for the ScriptRunner add-on for JIRA)

[Daniel Turczanski - JQL Search Extensions]

Hi, an alternative is to use JQL Search Extensions

[Alexey Matveev]

If you do not want to use an add-on then you should add the Story Type dropdown to sub-tasks as well and fill it upon creation a new sub-task. It is inconvenient but you do not have to pay for add-ons. 

Or you can develop your own JQL function, but it would require some skills.

[Chris]

I see. Are you saying that there is no JQL function that can do what I'm looking for without an add-on?

[Alexey Matveev]

There is no JQL, which would let you choose subtasks for issues, out of the box