Custom query: filter by "component starts with..."

[vincent.privat@…]

The JOSM Trac instance defines about a dozen "Core xxx" and a hundred "Plugin xxx" components.

Currently Trac only allows to filter queries by "equals" or "not equals" criteria. Could we have two new choices to search for components starting (or not) with a string?

[anonymous]

The Milestones field has the same problem. I often use the wiki:TracQuery#QueryLanguage trick as a workaround:

^=	the field content starts with one of the values
!^=	the field content does not start with any of the values
…	…

Examples:

• ​query:status=reopened&component^=Core
• ​query:status=reopened&component!^=Core

The Custom Query UI will claim the filter is Component [is |▾] [Core |▾] but it actually shows the desired results in the table below. The trick stops working when you use the interactive query builder to change any filter though.

The main problem to fixing this is probably that this "would require the value field to morph into a text field instead of a drop-down menu, so this isn't easy" as discussed in: #1901, #548, #5979

[Jun Omae]

PoC can be found in jomae.git@t13089+1.2.

• Unit tests should be added.
• Query builder works well without javascript before the changes, but it doesn't after the changes.