這被證明有點難以追查,但是當使用Effort測試Entity Framework 6時,我似乎在嘗試訪問其中一個DBSet時收到KeyNotFoundException(“給定的密鑰在字典中不存在”)錯誤庫。
我注意到它在DbContext中使用了一個或兩個DbSet,但是一旦我開始向DbContext添加多個DbSets,我收到上述錯誤。
示例代碼(這是我整個代碼的簡化,當我從DbContext中註釋掉一些DbSets然後把它們放回去時,錯誤似乎是隨機的。我也有模型上的部分類,但它有時也成功,所以似乎奇怪的):
測試
[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; }
}
堆棧跟踪:
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