基础信息展示以及搜索逻辑进行修复

inventory-backend/app/services/inbound/base_service.py

@@ -156,6 +156,31 @@ class MaterialBaseService:
             print(f"查询基础信息列表失败: {e}")
             return {"total": 0, "items": []}
 
+    @staticmethod
+    def get_distinct_options():
+        """
+        获取所有已存在的类别和类型 (去重)
+        用于前端下拉筛选
+        """
+        try:
+            # 查询所有不为空的类别并去重
+            categories = db.session.query(MaterialBase.category) \
+                .filter(MaterialBase.category != None, MaterialBase.category != '') \
+                .distinct().all()
+
+            # 查询所有不为空的类型并去重
+            types = db.session.query(MaterialBase.material_type) \
+                .filter(MaterialBase.material_type != None, MaterialBase.material_type != '') \
+                .distinct().all()
+
+            return {
+                "categories": [c[0] for c in categories],
+                "types": [t[0] for t in types]
+            }
+        except Exception as e:
+            traceback.print_exc()
+            return {"categories": [], "types": []}
+
     @staticmethod
     def create_material(data):
         """新增基础信息"""