修复数据

src/Jiaowu.Api/Infrastructure/Persistence/AppDbContext.cs

@@ -4,6 +4,7 @@ using Jiaowu.Api.Domain.Identity;
 using Jiaowu.Api.Domain.System;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 namespace Jiaowu.Api.Infrastructure.Persistence;
 
@@ -90,6 +91,18 @@ public sealed class AppDbContext(DbContextOptions<AppDbContext> options)
         Set<GraduationClearanceRecord>();
     public DbSet<AuditLog> AuditLogs => Set<AuditLog>();
 
+    protected override void ConfigureConventions(
+        ModelConfigurationBuilder configurationBuilder)
+    {
+        base.ConfigureConventions(configurationBuilder);
+
+        // Connector/NET returns MySQL DATE values as DateTime. An explicit
+        // provider conversion prevents EF from asking the reader for DateOnly.
+        configurationBuilder.Properties<DateOnly>()
+            .HaveConversion<DateOnlyDateTimeConverter>()
+            .HaveColumnType("date");
+    }
+
     protected override void OnModelCreating(ModelBuilder builder)
     {
         base.OnModelCreating(builder);
@@ -904,3 +917,8 @@ public sealed class AppDbContext(DbContextOptions<AppDbContext> options)
         });
     }
 }
+
+public sealed class DateOnlyDateTimeConverter()
+    : ValueConverter<DateOnly, DateTime>(
+        date => date.ToDateTime(TimeOnly.MinValue),
+        value => DateOnly.FromDateTime(value));

src/Jiaowu.Api/Infrastructure/Persistence/DemoDataSeeder.cs

@@ -8,6 +8,8 @@ public sealed class DemoDataSeeder(
     AppDbContext db,
     ILogger<DemoDataSeeder> logger)
 {
+    // MySql.EntityFrameworkCore 10 cannot type-map parameterized primitive
+    // collections, so membership in definition/ID sets is checked after loading.
     private const int Grade = 2026;
     private const int ClassesPerMajor = 2;
     private const int StudentsPerClass = 35;
@@ -176,14 +178,18 @@ public sealed class DemoDataSeeder(
             .SelectMany(x => x.Majors)
             .Select(x => x.Code)
             .ToHashSet(StringComparer.OrdinalIgnoreCase);
-        var majors = await db.Majors
+        var majors = (await db.Majors
+            .OrderBy(x => x.Code)
+            .ToListAsync(cancellationToken))
             .Where(x => targetMajorCodes.Contains(x.Code))
+            .ToList();
+        var majorIds = majors.Select(x => x.Id).ToHashSet();
+        var existingClasses = (await db.AdministrativeClasses
+            .Where(x => x.Grade == Grade)
             .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
-        var existingClasses = await db.AdministrativeClasses
-            .Where(x => x.Grade == Grade && targetMajorCodes.Contains(x.Major!.Code))
-            .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
+            .ToListAsync(cancellationToken))
+            .Where(x => majorIds.Contains(x.MajorId))
+            .ToList();
         var existingCodes = (await db.AdministrativeClasses
             .Select(x => x.Code)
             .ToListAsync(cancellationToken))
@@ -218,13 +224,16 @@ public sealed class DemoDataSeeder(
         var collegeCodes = CollegeDefinitions
             .Select(x => x.Code)
             .ToHashSet(StringComparer.OrdinalIgnoreCase);
-        var colleges = await db.Colleges
-            .Where(x => collegeCodes.Contains(x.Code))
+        var colleges = (await db.Colleges
             .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
-        var existingTeachers = await db.Teachers
-            .Where(x => colleges.Select(c => c.Id).Contains(x.CollegeId))
-            .ToListAsync(cancellationToken);
+            .ToListAsync(cancellationToken))
+            .Where(x => collegeCodes.Contains(x.Code))
+            .ToList();
+        var collegeIds = colleges.Select(x => x.Id).ToHashSet();
+        var existingTeachers = (await db.Teachers
+            .ToListAsync(cancellationToken))
+            .Where(x => collegeIds.Contains(x.CollegeId))
+            .ToList();
         var existingNumbers = (await db.Teachers
             .Select(x => x.TeacherNumber)
             .ToListAsync(cancellationToken))
@@ -264,14 +273,23 @@ public sealed class DemoDataSeeder(
             .SelectMany(x => x.Majors)
             .Select(x => x.Code)
             .ToHashSet(StringComparer.OrdinalIgnoreCase);
-        var classes = await db.AdministrativeClasses
-            .Where(x => x.Grade == Grade && targetMajorCodes.Contains(x.Major!.Code))
+        var targetMajorIds = (await db.Majors
+            .Select(x => new { x.Id, x.Code })
+            .ToListAsync(cancellationToken))
+            .Where(x => targetMajorCodes.Contains(x.Code))
+            .Select(x => x.Id)
+            .ToHashSet();
+        var classes = (await db.AdministrativeClasses
+            .Where(x => x.Grade == Grade)
             .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
+            .ToListAsync(cancellationToken))
+            .Where(x => targetMajorIds.Contains(x.MajorId))
+            .ToList();
         var classIds = classes.Select(x => x.Id).ToHashSet();
-        var existingStudents = await db.Students
+        var existingStudents = (await db.Students
+            .ToListAsync(cancellationToken))
             .Where(x => classIds.Contains(x.AdministrativeClassId))
-            .ToListAsync(cancellationToken);
+            .ToList();
         var existingNumbers = (await db.Students
             .Select(x => x.StudentNumber)
             .ToListAsync(cancellationToken))
@@ -404,19 +422,23 @@ public sealed class DemoDataSeeder(
         var collegeCodes = CollegeDefinitions
             .Select(x => x.Code)
             .ToHashSet(StringComparer.OrdinalIgnoreCase);
-        var colleges = await db.Colleges
+        var colleges = (await db.Colleges
+            .OrderBy(x => x.Code)
+            .ToListAsync(cancellationToken))
             .Where(x => collegeCodes.Contains(x.Code))
-            .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
+            .ToList();
         var collegeIds = colleges.Select(x => x.Id).ToHashSet();
-        var teachers = await db.Teachers
-            .Where(x => collegeIds.Contains(x.CollegeId) && x.Status == TeacherStatus.Active)
+        var teachers = (await db.Teachers
+            .Where(x => x.Status == TeacherStatus.Active)
             .OrderBy(x => x.TeacherNumber)
-            .ToListAsync(cancellationToken);
-        var courses = await db.Courses
+            .ToListAsync(cancellationToken))
             .Where(x => collegeIds.Contains(x.CollegeId))
+            .ToList();
+        var courses = (await db.Courses
             .OrderBy(x => x.Code)
-            .ToListAsync(cancellationToken);
+            .ToListAsync(cancellationToken))
+            .Where(x => collegeIds.Contains(x.CollegeId))
+            .ToList();
         var publicCourses = courses
             .Where(x => x.Nature is CourseNature.GeneralRequired or CourseNature.GeneralElective)
             .ToList();

tests/Jiaowu.Api.Tests/MySqlMigrationTests.cs

@@ -13,10 +13,7 @@ public sealed class MySqlMigrationTests
     [Fact]
     public void Production_migration_is_discoverable_and_generates_mysql_sql()
     {
-        var options = new DbContextOptionsBuilder<AppDbContext>()
-            .UseMySQL(
-                "Server=localhost;Database=jiaowu;User=__test__;Password=__not_used__;")
-            .Options;
+        var options = CreateMySqlOptions();
         using var db = new AppDbContext(options);
 
         Assert.Contains(LatestMigration, db.Database.GetMigrations());
@@ -33,4 +30,31 @@ public sealed class MySqlMigrationTests
         Assert.DoesNotContain("0001-01-01", script);
         Assert.DoesNotContain("0000-00-00", script);
     }
+
+    [Fact]
+    public void MySql_date_properties_use_datetime_provider_conversion()
+    {
+        using var db = new AppDbContext(CreateMySqlOptions());
+
+        var dateProperties = db.Model.GetEntityTypes()
+            .SelectMany(x => x.GetProperties())
+            .Where(x => x.ClrType == typeof(DateOnly) ||
+                        x.ClrType == typeof(DateOnly?))
+            .ToList();
+
+        Assert.NotEmpty(dateProperties);
+        Assert.All(dateProperties, property =>
+        {
+            Assert.Equal("date", property.GetColumnType());
+            Assert.Equal(
+                typeof(DateTime),
+                property.GetTypeMapping().Converter?.ProviderClrType);
+        });
+    }
+
+    private static DbContextOptions<AppDbContext> CreateMySqlOptions() =>
+        new DbContextOptionsBuilder<AppDbContext>()
+            .UseMySQL(
+                "Server=localhost;Database=jiaowu;User=__test__;Password=__not_used__;")
+            .Options;
 }