progress

server/src/main/kotlin/books/db/schema/BookDAO.kt

@@ -20,7 +20,11 @@ object BooksTable : IntIdTable("books") {
     var type = integer("type")
     var read = bool("read").default(false)
     var comments = varchar("comments", 255)
-    var parentBook = optReference("parent_book_id", id)
+
+    // Dieses Buch ist Teil eines Sammelbands.
+    // Null bedeutet: kein übergeordneter Sammelband.
+    var parent = optReference("parent_id", id)
+    
     val cover = blob("cover").nullable()
 }
 
@@ -48,10 +52,12 @@ class BookDAO(id: EntityID<Int>) : IntEntity(id) {
     val tags by TagsToBookDAO referrersOn TagsToBookTable.bookId
 
     // Verweis auf Sammelband (falls dieses Buch ein Teilroman ist)
-    var parentBook by BookDAO optionalReferencedOn BooksTable.parentBook
+    var parent by BookDAO optionalReferencedOn BooksTable.parent
 
     // Enthaltene Einzelromane (falls dieses Buch der Sammelband ist)
-    val containedBooks by BookDAO optionalReferrersOn BooksTable.parentBook
+    val containedBooks by BookDAO optionalReferrersOn BooksTable.parent
+
+    val samplerEntry by SamplerDAO optionalBackReferencedOn SamplerTable.bookId
 }
 
 fun bookDaoToModel(dao: BookDAO, includeChildren: Boolean = true): Book = Book(
@@ -72,12 +78,15 @@ fun bookDaoToModel(dao: BookDAO, includeChildren: Boolean = true): Book = Book(
     series = if (dao.series != null) Series(dao.series!!.id.value, dao.series!!.name) else null,
     seriesIndex = dao.seriesIndex,
 
-    dao.parentBook?.id?.value,
+    parentBookId = dao.parent?.id?.value,
     containedBooks = if (includeChildren) {
-        dao.containedBooks.map { bookDaoToModel(it, includeChildren = false) }
+        dao.containedBooks.map { child ->
+            bookDaoToModel(child, includeChildren = false)
+        }
     } else {
         emptyList()
     },
+    isSampler = dao.samplerEntry != null,
 
     artists = dao.artists.map {
         ArtistForBook(