Collection form: add a button to remove added books

internal/query/querycollections.go

@@ -20,6 +20,16 @@ func FetchCollectionHeader(db *gorm.DB, collectionId uint) (CollectionHeader, er
 	return collection, res.Error
 }
 
+func FetchCollectionHeaderFromItem(db *gorm.DB, itemId uint) (CollectionHeader, error) {
+	var collection CollectionHeader
+	query := db.Model(&model.Collection{})
+	query = query.Select("collections.name, collections.user_id")
+	query = query.Joins("left join collection_items on (collection_items.collection_id = collections.id)")
+	query = query.Where("collection_items.id = ?", itemId)
+	res := query.Find(&collection)
+	return collection, res.Error
+}
+
 type CollectionsQueryResult struct {
 	ID        uint
 	UserID    uint