From efe5281f2f2b1ff51dee5cb1d2daa8aa900bf206 Mon Sep 17 00:00:00 2001
From: DanyLE <xsang.le@gmail.com>
Date: Tue, 31 Jan 2023 15:17:54 +0100
Subject: [PATCH] fix: generated sql with syntax error  when some input object
 is empty

---
 silkmvc/core/sqlite.lua | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/silkmvc/core/sqlite.lua b/silkmvc/core/sqlite.lua
index c6fc914..3aa4441 100644
--- a/silkmvc/core/sqlite.lua
+++ b/silkmvc/core/sqlite.lua
@@ -40,22 +40,22 @@ function SQLQueryGenerator:sql_select()
         return v, f
     end
     local segments = {"SELECT"}
-    if f then
+    if f and f~= "" then
         table.insert(segments, f)
     else
         table.insert(segments, "*")
     end
     table.insert(segments, "FROM")
     table.insert(segments, self.table_name)
-    if j then
+    if j and j~= "" then
         table.insert(segments, j)
     end
-    if w then
+    if w  and j ~="" then
         table.insert(segments, "WHERE")
         table.insert(segments, w)
     end
 
-    if o then
+    if o and o ~= "" then
         table.insert(segments, "ORDER BY")
         table.insert(segments, o)
     end
@@ -71,10 +71,10 @@ function SQLQueryGenerator:sql_delete()
     local segments = {"DELETE"}
     table.insert(segments, "FROM")
     table.insert(segments, self.table_name)
-    if j then
+    if j and j ~= "" then
         table.insert(segments, j)
     end
-    if w then
+    if w and w ~= "" then
         table.insert(segments, "WHERE")
         table.insert(segments, w)
     end