生成代码时，增加dictType为空的判断，不然前端页面生成时会报错

doc-generator/src/main/resources/vm/vue/index-tree.vue.vm

@@ -116,7 +116,7 @@
           <image-preview :src="scope.row.${javaField}" :width="50" :height="50"/>
         </template>
       </el-table-column>
-#elseif($column.list && "" != $column.dictType)
+#elseif($column.list && $column.dictType &&"" != $column.dictType)
       <el-table-column label="${comment}" align="center" prop="${javaField}">
         <template #default="scope">
 #if($column.htmlType == "checkbox")

doc-generator/src/main/resources/vm/vue/index.vue.vm

@@ -132,7 +132,7 @@
           <image-preview :src="scope.row.${javaField}" :width="50" :height="50"/>
         </template>
       </el-table-column>
-#elseif($column.list && "" != $column.dictType)
+#elseif($column.list && $column.dictType && "" != $column.dictType)
       <el-table-column label="${comment}" align="center" prop="${javaField}">
         <template #default="scope">
 #if($column.htmlType == "checkbox")
@@ -153,7 +153,7 @@
         </template>
       </el-table-column>
     </el-table>
-    
+
     <pagination
       v-show="total>0"
       :total="total"