keep blank value for excel value selection

demo/test.yaml

@@ -30,3 +30,14 @@ fields:
     range: [`测试`,实测]
     prefix: "{"
     postfix: "}\t"
+
+  - field: test_excel1
+    from: test.account01.20200101
+    select: Address
+    where: 1=1
+    postfix: "\t"
+  - field: test_excel2
+    from: test.account01.20200101
+    select: InstReprIDCode
+    where: 1=1
+    postfix: "\t"

src/gen/excel.go

@@ -41,9 +41,9 @@ func GenerateFieldValuesFromExcel(filePath, sheet string, field *model.DefField)
 		if index >= constant.MaxNumb {
 			break
 		}
-		if strings.TrimSpace(item) == "" {
-			continue
-		}
+		//if strings.TrimSpace(item) == "" {
+		//	continue
+		//}
 
 		values[selectCol] = append(values[selectCol], item)
 		index = index + 1