Collection Item Dropdown support choose multiple items

[loongmxbt]

Describe the Improvement

Now Collection Item Dropdown only support choosing one item. I think it's useful to enable multiple selection.

[danmaze]

You can create a one-to-many relational field to support this - will need a corresponding separate collection to hold this relation which some might not like. However, I think this approach keeps the data model more normalized than if an array of item IDs were used.

[loongmxbt]

Hi @danmaze, I think this feature is an alternative to "many-to-many" scenarios. One-to-Many cannot be used alone and need another M2O to correspond with. For example, many of my collections are related to tags collection, thus results many "M2M hidden collections". If I don't want them I can just create a dropdown with multiple items.

[JoshTheDerf]

This would be helpful for a different use-case: Flows. Flow trigger modals can't select relational data apart from using a collection item dropdown. If you need multiple collection item dropdowns in your flow trigger right now, you have to use a repeater + collection item dropdown interface.

[Dominic-Marcelino]

Facing the same - did you found a good solution aside from wrapping an Collection-Item-Dropdown inside a repeater? 🤔

[danmaze]

Yeah, repeater + collection item dropdown is probably the only option if you prefer not creating a separate relational collection. Note that you have to select "JSON" type when creating the field to see the collection item dropdown option.

cc @loongmxbt

[SergeyRe]

Take a look to my extension directus-extension-keep-related-collection-ids-in-csv
Its way to keep relation in form csv array (work both for M2M and M2O types of relation)
The main advantage of CSV field is to use it for conditions ( not possible for standard M2M)

[JamesW1]

Thanks for the suggestion! We've moved feature requests over to our public roadmap at https://roadmap.directus.io/roadmap - please submit this there instead. Thanks!