feat: 新增指定月份无数据时选用最新数据

src/main/java/mjkf/xinke/main/controller/LocalMaterialController.java

@@ -48,7 +48,10 @@ public class LocalMaterialController {
             @ApiParam(value = "规格") @RequestParam(value="spec", required=false) String spec,
             @ApiParam(value = "名称") @RequestParam(value="name", required=false) String name
     ) {
-        var query = localMaterialService.getQuery(year, month, city, county, spec, name, null);
+        // 指定月份无数据时选用最新数据
+        var date = localMaterialService.checkDate(year, month);
+
+        var query = localMaterialService.getQuery(date.getYear(), date.getMonth().getValue(), city, county, spec, name, null);
         query.orderByDesc(LocalMaterial::getName);
         List<LocalMaterial> data = localMaterialService.list(query);
 

src/main/java/mjkf/xinke/main/service/LocalMaterialService.java

@@ -1,5 +1,6 @@
 package mjkf.xinke.main.service;
 
+import cn.hutool.core.util.ObjectUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import mjkf.xinke.main.model.db.LocalMaterial;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
@@ -10,6 +11,27 @@ import java.util.Map;
 
 @Service
 public class LocalMaterialService extends DataService<BaseMapper<LocalMaterial>, LocalMaterial> {
+    /**
+     * 获取指定月份前含数据的最新日期
+     * @param year
+     * @param month
+     * @return
+     */
+    public LocalDate checkDate(Integer year, Integer month) {
+        LambdaQueryWrapper<LocalMaterial> query = new LambdaQueryWrapper<>();
+        var startDate = LocalDate.of(year, month, 1);
+        var endDate = startDate.plusMonths(1);
+        query.lt(LocalMaterial::getDate, endDate);
+        query.orderByDesc(LocalMaterial::getDate);
+        var result = (LocalMaterial)this.getOne(query, false);
+        if (ObjectUtil.isEmpty(result)) {
+            return LocalDate.of(year, month, 1);
+        } else {
+            return result.getDate();
+        }
+    }
+
+
     public LambdaQueryWrapper<LocalMaterial> indexQuery(LocalMaterial data) {
         LambdaQueryWrapper<LocalMaterial> query = new LambdaQueryWrapper<>();
         query.eq(LocalMaterial::getName, data.getName());