ABP的Core2.0使用mysql数据，在使用linq语句报错了
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悬赏园豆：180
[已解决问题]
解决于 2018-12-08 17:48
好像时mysql的bool类型与linq有问题 ，有谁有这样的错吗，
下面的错时在初始化数据的时候，在执行linq语句就报错了
No coercion operator is defined between types 'System.Int16' and 'System.Boo
有哪位大佬知道怎么解决吗？
1 migrationBuilder.CreateTable( 2 name: "AbpEditions", 3 columns: table => new 4 { 5 Id = table.Column<int>(nullable: false) 6 .Annotation("MySQL:AutoIncrement", true), 7 CreationTime = table.Column<DateTime>(nullable: false), 8 CreatorUserId = table.Column<long>(nullable: true), 9 LastModificationTime = table.Column<DateTime>(nullable: true), 10 LastModifierUserId = table.Column<long>(nullable: true), 11 IsDeleted = table.Column<short>(nullable: false), 12 DeleterUserId = table.Column<long>(nullable: true), 13 DeletionTime = table.Column<DateTime>(nullable: true), 14 Name = table.Column<string>(maxLength: 32, nullable: false), 15 DisplayName = table.Column<string>(maxLength: 64, nullable: false) 16 }, 17 constraints: table => 18 { 19 table.PrimaryKey("PK_AbpEditions", x => x.Id); 20 });
1 modelBuilder.Entity("Abp.Application.Editions.Edition", b => 2 { 3 b.Property<int>("Id") 4 .ValueGeneratedOnAdd(); 5 6 b.Property<DateTime>("CreationTime"); 7 8 b.Property<long?>("CreatorUserId"); 9 10 b.Property<long?>("DeleterUserId"); 11 12 b.Property<DateTime?>("DeletionTime"); 13 14 b.Property<string>("DisplayName") 15 .IsRequired() 16 .HasMaxLength(64); 17 18 b.Property<bool>("IsDeleted"); 19 20 b.Property<DateTime?>("LastModificationTime"); 21 22 b.Property<long?>("LastModifierUserId"); 23 24 b.Property<string>("Name") 25 .IsRequired() 26 .HasMaxLength(32); 27 28 b.HasKey("Id"); 29 30 b.ToTable("AbpEditions"); 31 });
执行下面的linq就报错了
1 private void CreateEditions() 2 { 3 var defaultEdition = _context.Editions.IgnoreQueryFilters().FirstOrDefault(e => e.Name == EditionManager.DefaultEditionName); 4 if (defaultEdition == null) 5 { 6 defaultEdition = new Edition { Name = EditionManager.DefaultEditionName, DisplayName = EditionManager.DefaultEditionName }; 7 _context.Editions.Add(defaultEdition); 8 _context.SaveChanges(); 9 10 /* Add desired features to the standard edition, if wanted... */ 11 } 12 }
最佳答案
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连接串： Data Source=IP;port=3306;Initial Catalog=hans;user id=root;password=***;charset=gbk;allow zero datetime=True;convert zero datetime=True;SslMode = none;
allow zero datetime=True;convert zero datetime=True; 就是这这个换换失败了 去掉就可以了
其他回答(2)
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看一下你的实体定义，bit对应的是bool类型。
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IsDeleted = table.Column<short>(nullable: false) 怎么是 short ？
收获园豆：180
不懂，实用ef生成迁移文件的时候，他就是生成这样的。
@HANS许: 参考 https://q.cnblogs.com/q/108459/
@dudu: 肯定是有找到这个帖子的，就是按照他这样子，加了连接字符串上去，还是不行
@HANS许: 试试改为 b.Property<bool>("IsDeleted").HasColumnType("bit"); 重新生成数据库
@dudu:因为使用这个框架，他这个删除字段是继承类的，有很多的类，对象继承，有什么办法一次性解决，在ef这边直接解决掉吗？
@HANS许: 就加个.HasColumnType("bit");，其他地方不用改
@dudu: 不是 我的意思是，这个IsDetele字段，是基类的字段，我很多字段继承他，但如你所见，他这边声场迁移文件就是short这样子，所以迁移文件有很多表示这样子的，有什么可以在更为上层去解决。
@HANS许: 迁移文件不就是根据 DbContext 生成的吗？
@dudu: 的确，但是要怎么写呢？都是这边，Tenant, Role, User像这种也有“IsDelete”的字段，都是继承一个基类，总不能每个都去写“.HasColumnType("bit");”吧
1 public class HANSCoreDbContext : AbpZeroDbContext<Tenant, Role, User, HANSCoreDbContext> 2 { 3 /* Define a DbSet for each entity of the application */ 4 5 public HANSCoreDbContext(DbContextOptions<HANSCoreDbContext> options) 6 : base(options) 7 { 8 9 } 10 11 protected override void OnModelCreating(ModelBuilder modelBuilder) 12 { 13 base.OnModelCreating(modelBuilder); 14 15 } 16 17 18 }
1 // 2 // 摘要: 3 // Base DbContext for ABP zero. Derive your DbContext from this class to have base 4 // entities. 5 public abstract class AbpZeroDbContext<TTenant, TRole, TUser, TSelf> : AbpZeroCommonDbContext<TRole, TUser, TSelf> 6 where TTenant : AbpTenant<TUser> 7 where TRole : AbpRole<TUser> 8 where TUser : AbpUser<TUser> 9 where TSelf : AbpZeroDbContext<TTenant, TRole, TUser, TSelf> 10 { 11 // 12 // 参数: 13 // options: 14 protected AbpZeroDbContext(DbContextOptions<TSelf> options); 15 16 // 17 // 摘要: 18 // Tenants 19 public virtual DbSet<TTenant> Tenants { get; set; } 20 // 21 // 摘要: 22 // Editions. 23 public virtual DbSet<Edition> Editions { get; set; } 24 // 25 // 摘要: 26 // FeatureSettings. 27 public virtual DbSet<FeatureSetting> FeatureSettings { get; set; } 28 // 29 // 摘要: 30 // TenantFeatureSetting. 31 public virtual DbSet<TenantFeatureSetting> TenantFeatureSettings { get; set; } 32 // 33 // 摘要: 34 // EditionFeatureSettings. 35 public virtual DbSet<EditionFeatureSetting> EditionFeatureSettings { get; set; } 36 // 37 // 摘要: 38 // Background jobs. 39 public virtual DbSet<BackgroundJobInfo> BackgroundJobs { get; set; } 40 // 41 // 摘要: 42 // User accounts 43 public virtual DbSet<UserAccount> UserAccounts { get; set; } 44 // 45 // 摘要: 46 // Notifications. 47 public virtual DbSet<NotificationInfo> Notifications { get; set; } 48 49 // 50 // 参数: 51 // modelBuilder: 52 protected override void OnModelCreating(ModelBuilder modelBuilder); 53 }
@dudu: 按照这两个帖子来讲，官方的mysql，似乎并没有提供解决方案，其中有个人是使用了第三方的mysqlCoreEntityFrameWork。然后我也引用，是没有报错了。但是有引发一个错误了
System.InvalidOperationException HResult=0x80131509 Message=An exception occurred while reading a database value for property 'Edition.CreationTime'. The expected type was 'System.DateTime' but the actual value was of type 'MySql.Data.Types.MySqlDateTime'. Source=Microsoft.EntityFrameworkCore StackTrace: at Microsoft.EntityFrameworkCore.Metadata.Internal.EntityMaterializerSource.ThrowReadValueException[TValue](Exception exception, Object value, IPropertyBase property) at Microsoft.EntityFrameworkCore.Storage.Internal.TypedRelationalValueBufferFactory.Create(DbDataReader dataReader) at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.BufferlessMoveNext(DbContext _, Boolean buffer) at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded) at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext() at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found) at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ResultEnumerable`1.GetEnumerator() at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.<_TrackEntities>d__17`2.MoveNext() at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext() at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found) at System.Linq.Enumerable.First[TSource](IEnumerable`1 source) at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass15_1`1.<CompileQueryCore>b__0(QueryContext qc) at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source, Expression`1 predicate) at HANSCore.EntityFrameworkCore.Seed.Tenants.DefaultTenantBuilder.CreateDefaultTenant() in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\Seed\Tenants\DefaultTenantBuilder.cs:line 32 at HANSCore.EntityFrameworkCore.Seed.Tenants.DefaultTenantBuilder.Create() in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\Seed\Tenants\DefaultTenantBuilder.cs:line 20 at HANSCore.EntityFrameworkCore.Seed.SeedHelper.SeedHostDb(HANSCoreDbContext context) in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line 28 at HANSCore.EntityFrameworkCore.Seed.SeedHelper.WithDbContext[TDbContext](IIocResolver iocResolver, Action`1 contextAction) in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line 41 at HANSCore.EntityFrameworkCore.Seed.SeedHelper.SeedHostDb(IIocResolver iocResolver) in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\Seed\SeedHelper.cs:line 17 at HANSCore.EntityFrameworkCore.HANSCoreEntityFrameworkModule.PostInitialize() in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.EntityFrameworkCore\EntityFrameworkCore\HANSCoreEntityFrameworkModule.cs:line 46 at System.Collections.Generic.List`1.ForEach(Action`1 action) at Abp.AbpBootstrapper.Initialize() at Abp.AspNetCore.AbpApplicationBuilderExtensions.InitializeAbp(IApplicationBuilder app) at Abp.AspNetCore.AbpApplicationBuilderExtensions.UseAbp(IApplicationBuilder app, Action`1 optionsAction) at HANSCore.Web.Startup.Startup.Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) in E:\HANS_x\Core\Web\HANSABPCore\HANSCore\4.2.1\aspnet-core\src\HANSCore.Web.Mvc\Startup\Startup.cs:line 54 内部异常 1: InvalidCastException: Unable to cast object of type 'MySql.Data.Types.MySqlDateTime' to type 'System.DateTime'.
建议提供一下EF Core的映射配置代码
– dudu 6年前@dudu: 已附上 但是是项目里的所有bool类型都是这样子的 这个就是个例子
– HANS许 6年前