我有一个 Sybase ASE 数据库的实体模型，我正在尝试使用Effort Framework为其创建单元测试。我可以在主项目和单元测试项目中使用实体模型访问数据库，但是当尝试使用 Effort 创建内存数据库时，出现异常。
单元测试项目中的问题代码
public SetUpShims()
{
string connString = System.Configuration.ConfigurationManager.ConnectionStrings["CoPathDataContext"].ConnectionString;
MyDbContext context;
// CreateTransient throws exception
EntityConnection conn = Effort.EntityConnectionFactory.CreateTransient(connString);
context = new Data.CoPathDataContext(conn);
}
异常详细信息：（System.Data.MetadataException）
Schema specified is not valid. Errors:
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
(0,0) : error 0063: Precision facet isn't allowed for properties of type double.
堆栈跟踪
at System.Data.Metadata.Edm.StoreItemCollection.Loader.ThrowOnNonWarningErrors()
at System.Data.Metadata.Edm.StoreItemCollection.Loader.LoadItems(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths)
at System.Data.Metadata.Edm.StoreItemCollection.Loader..ctor(IEnumerable`1 xmlReaders, IEnumerable`1 sourceFilePaths, Boolean throwOnError)
at System.Data.Metadata.Edm.StoreItemCollection.Init(IEnumerable`1 xmlReaders, IEnumerable`1 filePaths, Boolean throwOnError, DbProviderManifest& providerManifest, DbProviderFactory& providerFactory, String& providerManifestToken, Memoizer`2& cachedCTypeFunction)
at System.Data.Metadata.Edm.StoreItemCollection..ctor(IEnumerable`1 xmlReaders)
at Effort.Internal.Common.MetadataWorkspaceHelper.CreateMetadataWorkspace(List`1 csdl, List`1 ssdl, List`1 msl)
at Effort.Internal.Common.MetadataWorkspaceHelper.Rewrite(String metadata, String providerInvariantName, String providerManifestToken)
at Effort.EntityConnectionFactory.<GetEffortCompatibleMetadataWorkspace>b__1(String metadata)
at Effort.Internal.Caching.MetadataWorkspaceStore.<>c__DisplayClass1.<GetMetadataWorkspace>b__0()
at System.Lazy`1.CreateValue()
at System.Lazy`1.LazyInitValue()
at System.Lazy`1.get_Value()
at Effort.Internal.Caching.ConcurrentCache`2.Get(TKey key, Func`1 factory)
at Effort.Internal.Caching.MetadataWorkspaceStore.GetMetadataWorkspace(String metadata, Func 2 workspaceFactoryMethod)
at Effort.EntityConnectionFactory.GetEffortCompatibleMetadataWorkspace(String& entityConnectionString)
at Effort.EntityConnectionFactory.CreateTransient(String entityConnectionString, IDataLoader dataLoader)
at Effort.EntityConnectionFactory.CreateTransient(String entityConnectionString)
在查看了 Entity 制作的 .csdl 和 .ssdl 文件后，我相信我找到了导致问题的字段。
固态硬盘
<Property Name="sequence_num" Type="float" Precision="24" Nullable="false" />
CSDL
<Property Name="sequence_num" Type="Double" Nullable="false" />
我尝试从 SSDL 字段中删除 Precision 属性，但仍然收到相同的错误。（即使它确实有效，重新生成模型时更改也可能不会持续存在）
任何人都在思考导致异常的原因以及我应该如何解决它？