Mic*_*tos 3 c# postgresql entity-framework-core ef-core-3.0
起初我想使用 EF Core code-first 在 PostgreSQL 数据库中生成我的模型。这失败了,因为我有一个例外:
对于 CLR 类型为“bool”的属性“Webservice.Models.Db.Order.High”,找不到到关系类型的映射
所以我改变了我的模型并删除了,bool但我仍然得到同样的异常。我找不到这个问题的解决方案。
这是我的旧模型类:
public class Order : IEquatable<Order>, ICloneable
{
public long Id { get; set; }
public long? DeviceId { get; set; }
[Required]
[DataType(DataType.Text)]
public Device Device { get; set; }
public long? OriginOrderId { get; set; }
[Required]
[DataType(DataType.Date)]
public DateTime RoutineStart { get; set; }
[Required]
[EnumDataType(typeof(Routine))]
public Routine Routine { get; set; }
[Required]
[DataType(DataType.Text)]
public int Pin { get; set; }
[Required]
public bool High { get; set; }
[Required]
[DataType(DataType.Text)]
public int TimeInMilliseconds { get; set; }
public string Description { get; set; }
[NotMapped]
public bool Ready { get; set; }
public OrderState State { get; set; } = OrderState.Idle;
}
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我从add-migration init导致此异常开始:
Microsoft.EntityFrameworkCore.Infrastructure[10403]
Entity Framework Core 3.0.0 使用提供程序“Npgsql.EntityFrameworkCore.PostgreSQL”初始化“ApplicationDbContext”,选项为:无 System.InvalidOperationException:找不到属性“Webservice.Models”到关系类型的映射.Db.Order.High' 与 CLR 类型 'bool'。在 Microsoft.EntityFrameworkCore.Storage.RelationalTypeMappingSourceExtensions.GetMapping(IRelationalTypeMappingSource typeMappingSource, IProperty property)
在 Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Add(IProperty target, DiffContext diffContext, Boolean inline)+MoveNext()
在 Microsoft.EntityFrameworkCore Internal.MigrationsModelDiffer.DiffCollection[T](IEnumerable1 sources, IEnumerable1 目标,DiffContext diffContext,Func4 diff, Func3 add,Func3 remove, Func4[] 谓词)+MoveNext()
在 System.Linq.Enumerable.ConcatIterator 1 源,IEnumerable 4 diff,Func 3 移除,Func 1.MoveNext() 在 Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Sort(IEnumerable1.MoveNext()
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Diff(TableMapping source, TableMapping target, DiffContext diffContext)+MoveNext()
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.DiffCollection[T](IEnumerable1 targets, DiffContext diffContext, Func3 add, Func4[] predicates)+MoveNext()
at System.Linq.Enumerable.ConcatIterator1 operations, DiffContext diffContext)1.b__0()
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.GetDifferences(IModel source, IModel target)
at Microsoft.EntityFrameworkCore.Migrations.Design.MigrationsScaffolder.ScaffoldMigration(String migrationName, String rootNamespace, String subNamespace, String language)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0
在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
找不到与 CLR 类型为“bool”的属性“Webservice.Models.Db.Order.High”的关系类型的映射.
然后我更新了我的模型:
public enum PinState
{
Low,
High
}
public class Order : IEquatable<Order>, ICloneable
{
public long Id { get; set; }
public long? DeviceId { get; set; }
[Required]
[DataType(DataType.Text)]
public Device Device { get; set; }
public long? OriginOrderId { get; set; }
[Required]
[DataType(DataType.Date)]
public DateTime RoutineStart { get; set; }
[Required]
[EnumDataType(typeof(Routine))]
public Routine Routine { get; set; }
[Required]
[DataType(DataType.Text)]
public int Pin { get; set; }
[Required]
public PinState PinState { get; set; }
[Required]
[DataType(DataType.Text)]
public int TimeInMilliseconds { get; set; }
public string Description { get; set; }
[NotMapped]
public bool Ready { get; set; }
public OrderState State { get; set; } = OrderState.Idle;
}
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然后我尝试add-migration inittest导致完全相同的异常。
我的上下文作为范围服务运行:
services.AddDbContext<ApplicationDbContext>(options =>
options.UseNpgsql(Configuration.GetConnectionString("postgres")), ServiceLifetime.Scoped);
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在数据库端迁移历史是空的。
如果有人能向我解释为什么会发生此异常,我将不胜感激。
我遇到了这个问题,起初我对 Sql Server 数据库进行了迁移,然后我尝试为 PostgreSQL 添加新的迁移
因此,我的解决方案是完全删除所有迁移并为 PostgreSQL 重新创建它们。
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