fix: ignore null level prices when updating commodity

play-admin/src/test/java/com/starry/admin/api/PlayCommodityInfoApiTest.java

@@ -221,6 +221,39 @@ class PlayCommodityInfoApiTest extends WxCustomOrderApiTestSupport {
         assertThat(pricing.getPrice()).isEqualByComparingTo(new BigDecimal("188.50"));
     }
 
+    @Test
+    // 测试用例：调用价格更新接口时若某个等级价格传入null，接口应忽略该列并保持原价，确保支持分步维护价格。
+    void updateInfoSkipsNullLevelPrices() throws Exception {
+        ensureTenantContext();
+        PlayCommodityAndLevelInfoEntity before = commodityAndLevelInfoService.lambdaQuery()
+                .eq(PlayCommodityAndLevelInfoEntity::getCommodityId, ApiTestDataSeeder.DEFAULT_COMMODITY_ID)
+                .eq(PlayCommodityAndLevelInfoEntity::getLevelId, ApiTestDataSeeder.DEFAULT_CLERK_LEVEL_ID)
+                .one();
+
+        assertThat(before).as("种子数据应具备默认等级价格").isNotNull();
+
+        ObjectNode payload = objectMapper.createObjectNode();
+        payload.put("id", ApiTestDataSeeder.DEFAULT_COMMODITY_ID);
+        payload.putNull(ApiTestDataSeeder.DEFAULT_CLERK_LEVEL_ID);
+
+        mockMvc.perform(post("/shop/commodity/updateInfo")
+                        .header(USER_HEADER, DEFAULT_USER)
+                        .header(TENANT_HEADER, DEFAULT_TENANT)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(payload.toString()))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(200));
+
+        ensureTenantContext();
+        PlayCommodityAndLevelInfoEntity after = commodityAndLevelInfoService.lambdaQuery()
+                .eq(PlayCommodityAndLevelInfoEntity::getCommodityId, ApiTestDataSeeder.DEFAULT_COMMODITY_ID)
+                .eq(PlayCommodityAndLevelInfoEntity::getLevelId, ApiTestDataSeeder.DEFAULT_CLERK_LEVEL_ID)
+                .one();
+
+        assertThat(after).isNotNull();
+        assertThat(after.getPrice()).as("空价格不应覆盖原值").isEqualByComparingTo(before.getPrice());
+    }
+
     @Test
     // 测试用例：使用商品修改接口把自动结算等待时长从不限时（-1）调整为10分钟，验证更新后查询返回新的配置。
     void updateEndpointSwitchesAutomaticSettlement() throws Exception {