Compatibility and limits

Compound Field uses the field types provided by your installed modules. See available field types for common choices and required modules.

Boundaries that affect a design

Capability	Supported scope
Outer cardinality	One, a finite number, or unlimited compound items.
Sub-field cardinality	A finite cap of at least one. More slots require more database columns.
Nesting	Compounds can contain other compounds; cycles and schemas beyond the column budget are refused.
Translation and revisions	Values follow the host. There is no independent revision or translation entity per compound item. See translation and moderation.
Sub-field configuration	Sub-fields share the compound definition. They do not each have a separate exported field configuration.
Core Migrate	A process plugin accepts the documented nested wire shape.
Feeds	No Compound Field target plugin is provided.
Layout Builder	Host compound blocks and optional sub-field blocks. No layout editor for a compound's own internal display.
Composition	Use the Composition tab or the includes configuration key to share sub-field definitions.

Changes can remove history

Removing a populated sub-field or lowering its cap can destroy values in current and historical revision tables, across every field using the compound. The UI requires explicit consent. A normal content revision cannot recover dropped columns. Keep a database backup and use the removal tutorial.

Deleting a host field leaves deleted data awaiting purge. The compound must stay installed until purge finishes. Remove a compound in order.

Contrib and release status

Sub-field widgets, formatters and field-type plugins still need evaluation with your site's settings. A contrib feature that expects its own persisted field.field.* configuration may need explicit integration.

Entity Reference Revisions can retain orphaned paragraphs held through a compound. The upstream purger does not recognize every composite parent field. Keep that storage cost in mind when choosing revision references.

Compound Field is pre-alpha. Features and configuration may change between versions. Rehearse upgrades and structural changes on a copy of the site.