search help/value help is not implemented in the classic way (with SE11 search helps + F4 help). Instead, RAP follows the Fiori and OData paradigm:

• Search Help (free text search): Implemented via @Search annotations on CDS views.
• Value Help (F4 help / dropdowns): Implemented via associations + @Consumption.valueHelpDefinition annotations.

1. Search Help in RAP

Search is enabled using annotations in the Projection View or Consumption View.

@Search.searchable: true
define view entity ZI_Book
as select from zbook
{
key book_id,
title,
author,
publisher
}

• @Search.searchable: true → Allows free-text search across all fields.
• You can refine it:

@Search.defaultSearchElement: true
title,

@Search.defaultSearchElement: true
author

2. Value Help in RAP

For dropdowns or F4 helps, you define associations and annotate them.

Step 1: Define Value Help View

@EndUserText.label: ‘Value Help for Publishers’
define view entity ZI_PublisherVH
as select from zpublisher
{
key publisher_id,
name
}

Step 2: Add Association in Main View

define view entity ZI_Book
as select from zbook
association [0..1] to ZI_PublisherVH as _Publisher
on $projection.publisher_id = _Publisher.publisher_id
{
key book_id,
title,
publisher_id,
_Publisher
}

Step 3: Annotate Value Help

@Consumption.valueHelpDefinition: [
{ entity: { name: ‘ZI_PublisherVH’, element: ‘publisher_id’ } }
]
publisher_id,

Now in Fiori, publisher_id will show F4 help with dropdown based on ZI_PublisherVH.