"Add to campaign" on versioned GridFields

[chillu]

Overview

At the moment you can only add pages and files to campaigns via the UI. Other DataObjects can be implicitly added through a custom $owns relationship on a page or a file, but not separately through the UI.

Acceptance Criteria

• I can add a DataObject to an existing or new campaign when viewing it in ModelAdmin
• I can add a DataObject to an existing or new campaign when viewing it in GridField (e.g. nested in the pages section)
• The functionality should be enabled by default on GridFields managing versioned records
• I can find out about these capabilities through https://docs.silverstripe.org/en/4/developer_guides/model/versioning/

Notes

• Remove duplicated existing logic, move to campaign admin
• Related: Make it easier to add items to a campaign

[bergice]

@chillu

Need clarification on whether any DataObject can be added to campaign or just Pages and Files.

[chillu]

@bergice Yep, any dataobject. It might not have a way to be previewed within the campaign admin (unless defined by the dev?), but that should be handled gracefully already in the UI.

[clarkepaul]

@chillu FYI I've added this to backlog/discussion pipeline as this should be something we do (along with the ability to add content blocks to a campaign without the page it belongs too).

[KINKCreative]

Has there been any movement on this? Are there other workarounds to add a custom DataObject to a Campaign?

[UndefinedOffset]

Not sure if there's been movement on this side but I put something together on webbuilders-group/silverstripe-add-to-campaigns we've used it on a few projects and it seems to work well.