初始提交

Services/Hncore.Pass.Sells/Service/Coupon/CouponUserUseService.cs

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+using Hncore.Infrastructure.Service;
+using Hncore.Pass.Sells.Domain;
+using Microsoft.AspNetCore.Http;
+using Microsoft.EntityFrameworkCore;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Hncore.Pass.Sells.Service
+{
+    public class CouponUserUseService : ServiceBase<CouponUserUseEntity>, IFindService
+    {
+        CourseContext m_DbContext;
+        public CouponUserUseService(CourseContext dbContext, IHttpContextAccessor httpContextAccessor) : base(dbContext, httpContextAccessor)
+        {
+            m_DbContext = dbContext;
+        }
+
+        public async Task<List<CouponUserUseEntity>> GetUsedCoupon(int userId, int couponId = 0)
+        {
+            var ret = await this.Query(m => m.UserId == userId && (couponId == 0 || m.CouponId == couponId)).ToListAsync();
+            var origins = ret.GroupBy(m => m.CouponId).Select(m =>
+            {
+                var usedCoupon = new CouponUserUseEntity()
+                {
+                    CouponCount = m.Sum(p => p.CouponCount),
+                    CouponId = m.Key,
+                    UserId = userId
+                };
+                return usedCoupon;
+            });
+            return origins.ToList();
+        }
+    }
+}