问题修改

src/main/resources/mapper/TraceBackMapper.xml

@@ -203,7 +203,15 @@
     </select>
     <!-- 查询追溯单绑定的SN码 -->
     <select id="getTraceBackSn" resultType="com.tld.model.TraceBack">
-        select id,track_id,sn_code from tld_trace_back_sn where track_id = #{trackId}
+        select
+            b.delivery_order,
+            b.delivery_code,
+            b.delivery_company,
+            a.sn_code,
+            a.id
+        from tld_trace_back_sn a
+        join tld_trace_back b on a.track_id = b.id
+        where track_id = #{trackId}
     </select>
     <!-- 导出追溯单绑定的SN码 -->
     <select id="TraceBackSnExport" resultType="java.util.LinkedHashMap">