访问DbSet时的Effort(EF6)异常(字典中没有给定的密钥)

.net effort entity-framework entity-framework-6 linq

这被证明有点难以追查,但是当使用Effort测试Entity Framework 6时,我似乎在尝试访问其中一个DBSet时收到KeyNotFoundException(“给定的密钥在字典中不存在”)错误库。

我注意到它在DbContext中使用了一个或两个DbSet,但是一旦我开始向DbContext添加多个DbSets,我收到上述错误。

示例代码(这是我整个代码的简化,当我从DbContext中注释掉一些DbSets然后把它们放回去时,错误似乎是随机的。我也有模型上的部分类,但它有时也成功,所以似乎奇怪的):

测试

            [Fact]
            public void MyTest()
            {
                var connection = Effort.DbConnectionFactory.CreateTransient();
                var context = new StubDbContext(connection);

                var count = context.Models1.Count();
                Assert.Equal(count, 0);

            }

DBContext和DbSets模型

    public class StubEntityModelA
    {
        [Key]
        public int Id { get; set; }
        public string Name { get; set; }
    }

    public class StubEntityModelB
    {
        [Key]
        public int Id { get; set; }
        public string Name { get; set; }
    }

    public class StubEntityModelC
    {
        [Key]
        public int Id { get; set; }
        public string Name { get; set; }
    }

    public class StubDbContext : DbContext
    {
        public StubDbContext(DbConnection connection): base(connection, true)
        {
        }
        public virtual DbSet<StubEntityModelA> Models1 { get; set; }
        public virtual DbSet<StubEntityModelB> Models2 { get; set; }
        public virtual DbSet<StubEntityModelC> Models3 { get; set; }
    }

堆栈跟踪:

   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at Effort.Provider.EffortProviderManifest.GetStoreType(TypeUsage edmType)
   at System.Data.Entity.ModelConfiguration.Edm.Services.StructuralTypeMappingGenerator.MapTableColumn(EdmProperty property, String columnName, Boolean isInstancePropertyOnDerivedType)
   at System.Data.Entity.ModelConfiguration.Edm.Services.PropertyMappingGenerator.Generate(EntityType entityType, IEnumerable`1 properties, EntitySetMapping entitySetMapping, MappingFragment entityTypeMappingFragment, IList`1 propertyPath, Boolean createNewColumn)
   at System.Data.Entity.ModelConfiguration.Edm.Services.TableMappingGenerator.Generate(EntityType entityType, DbDatabaseMapping databaseMapping)
   at System.Data.Entity.ModelConfiguration.Edm.Services.DatabaseMappingGenerator.GenerateEntityTypes(DbDatabaseMapping databaseMapping)
   at System.Data.Entity.ModelConfiguration.Edm.Services.DatabaseMappingGenerator.Generate(EdmModel conceptualModel)
   at System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo)
   at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
   at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
   at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
   at System.Linq.Queryable.Count[TSource](IQueryable`1 source)
   at XXXX.Business.Test.XXXXTests.IXXXXXXMethod.ShouldInsertRecordWhenNoneAlreadyExist() in C:\Workspaces\XXX\XXXXX\XXXXX.Business.Test\XXXXXXTests.cs:line 125

热门答案

我遇到了确切的问题。原来是因为我在我的一些SQL 2014数据库表中使用了SQL地理数据类型,并且努力不支持这种数据类型 ,并且目前还没有计划为它添加支持,这让我失望在一个真正的quandry,因为我找不到EF6的任何其他内存数据库提供程序!

可能还有其他较新的引用类型字段,它也不支持,不确定。



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许可下: CC-BY-SA with attribution
不隶属于 Stack Overflow
这个KB合法吗? 是的,了解原因