From 2b017a2ae3ead28d70f73e2f6a08387eace7f077 Mon Sep 17 00:00:00 2001
From: Book Pauk <bookpauk@gmail.com>
Date: Wed, 7 Dec 2022 19:57:59 +0700
Subject: [PATCH] =?UTF-8?q?=D0=A0=D0=B0=D0=B1=D0=BE=D1=82=D0=B0=20=D0=BD?=
 =?UTF-8?q?=D0=B0=D0=B4=20=D1=80=D0=B0=D1=81=D1=88=D0=B8=D1=80=D0=B5=D0=BD?=
 =?UTF-8?q?=D0=BD=D1=8B=D0=BC=20=D0=BF=D0=BE=D0=B8=D1=81=D0=BA=D0=BE=D0=BC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Search/SelectExtSearchDialog/SelectExtSearchDialog.vue    | 3 +++
 server/core/DbSearcher.js                                     | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/client/components/Search/SelectExtSearchDialog/SelectExtSearchDialog.vue b/client/components/Search/SelectExtSearchDialog/SelectExtSearchDialog.vue
index be370d4..026796b 100644
--- a/client/components/Search/SelectExtSearchDialog/SelectExtSearchDialog.vue
+++ b/client/components/Search/SelectExtSearchDialog/SelectExtSearchDialog.vue
@@ -160,6 +160,9 @@ class SelectExtSearchDialog {
         <li>
             префикс "#": поиск подстроки в строке, но только среди начинающихся не с латинского или кириллического символа
         </li>
+        <li>
+            префикс "?": поиск пустых значений или тех, что начинаются с этого символа
+        </li>
     </ul>
     Для числовых значений (N):
     <ul>
diff --git a/server/core/DbSearcher.js b/server/core/DbSearcher.js
index 143256e..49c7b48 100644
--- a/server/core/DbSearcher.js
+++ b/server/core/DbSearcher.js
@@ -548,7 +548,9 @@ class DbSearcher {
             const filterBySearch = (bookField, searchValue) => {
                 searchValue = searchValue.toLowerCase();
                 //особая обработка префиксов
-                if (searchValue[0] == '=') {
+                if (searchValue == emptyFieldValue) {
+                    return `(row.${bookField} === '' || row.${bookField}.indexOf(${db.esc(emptyFieldValue)}) === 0)`;
+                } else if (searchValue[0] == '=') {
 
                     searchValue = searchValue.substring(1);
                     return `(row.${bookField}.toLowerCase().localeCompare(${db.esc(searchValue)}) === 0)`;