Filter plugins

Custom Field provides filter plugins for datetime, daterange and entity_reference subfields, since none of core's generic filter handlers account for values living inside a Custom Field's own subfield columns.

custom_field_datetime

Class: CustomFieldDate

Filters datetime and daterange subfields. Extends core's numeric Date filter (rather than the string filter) to get sensible date comparison operators, while formatting comparisons using string-based date SQL to match how Custom Field stores its values.

Adds a value-type toggle so the exposed filter can accept either an absolute date or a relative offset (e.g. +1 day, -2 hours -30 minutes), and adapts its exposed widget based on whether the underlying subfield stores a date-only or full datetime value.

custom_field_entity_reference

Class: CustomFieldEntityReference

Filters entity_reference subfields. Extends core's EntityReference filter, but scopes the autocomplete/select value options to only the entities actually referenced in that specific subfield's column — via a subquery against the Custom Field table — rather than every entity of the target type. Also supports restricting the option list by target bundle.