Single attachment

db/index.cds

@@ -1,6 +1,7 @@
 // The common root-level aspect used in applications like that:
 // using { Attachments } from '@cap-js/attachments'
 aspect Attachments : sap.attachments.Attachments {}
+type Attachment : sap.attachments.Attachment;
 
 using {
   managed,
@@ -10,16 +11,19 @@ using {
 
 context sap.attachments {
 
-  aspect MediaData @(_is_media_data) {
+  type Attachment @(_is_media_data) {
     url       : String                                    @UI.Hidden;
-    content   : LargeBinary                               @title: '{i18n>Attachment}'; // only for db-based services
+    content   : LargeBinary                               @title: '{i18n>Attachment}' @Core.MediaType: 'application/octet-stream'; // only for db-based services
     mimeType  : String default 'application/octet-stream' @title: '{i18n>MediaType}';
     filename  : String                                    @title: '{i18n>FileName}';
-    hash      : String                                    @UI.Hidden                   @Core.Computed;
-    status    : String default 'Unscanned'                @title: '{i18n>ScanStatus}'  @Common.Text: statusNav.name  @Common.TextArrangement: #TextOnly;
+    hash      : String                                    @UI.Hidden                  @Core.Computed;
+    status    : String default 'Unscanned'                @title: '{i18n>ScanStatus}' @readonly;
+    lastScan  : Timestamp                                 @title: '{i18n>LastScan}'   @Core.Computed  @readonly;
+  }
+
+  aspect MediaData : Attachment {
     statusNav : Association to one ScanStates
                   on statusNav.code = status;
-    lastScan  : Timestamp                                 @title: '{i18n>LastScan}'    @Core.Computed;
   }
 
   entity ScanStates : CodeList {
@@ -48,7 +52,7 @@ context sap.attachments {
   annotate MediaData with @UI.MediaResource: {Stream: content} {
     content  @Core.MediaType: mimeType  @odata.draft.skip;
     mimeType @Core.IsMediaType;
-    status   @readonly;
+    status   @Common.Text: statusNav.name  @Common.TextArrangement: #TextOnly;
   }
 
   annotate Attachments with  @UI: {

lib/csn-runtime-extension.js

@@ -26,6 +26,17 @@ function collectAttachments(
   return resultSet
 }
 
+function getInlineAttachmentPrefixes(entity) {
+  if (entity?.["@_is_media_data"]) return [] // entity itself is composition-based
+  const prefixes = []
+  for (const [name, elem] of Object.entries(entity?.elements ?? {})) {
+    if (name.endsWith("_content") && elem?.["@_is_media_data"]) {
+      prefixes.push(name.slice(0, -"_content".length))
+    }
+  }
+  return prefixes
+}
+
 function hasAttachmentsComposition(entity, visitedEdges = new Set()) {
   if (!entity?.compositions) return false
 
@@ -57,6 +68,12 @@ Object.defineProperty(cds.builtin.classes.entity.prototype, "_attachments", {
       get isAttachmentsEntity() {
         return !!entity?.["@_is_media_data"]
       },
+      get inlineAttachmentPrefixes() {
+        return getInlineAttachmentPrefixes(entity)
+      },
+      get hasInlineAttachments() {
+        return getInlineAttachmentPrefixes(entity).length > 0
+      },
     }
   },
 })