如何通过单元测试检查的属性标记为在ORM模型计算的? [英] How check by unit test that properties mark as computed in ORM model?
问题描述
我被实体框架创建ORM 5.0(C#4.5) - 数据库第一个
作为计算即时标志着实体的某些属性(绑定到柱。 。缺省值)
如何通过单元测试检查的属性标记为在ORM模型计算
请注意:测试。需要在ORM紧急重新创建实体后,控制计算性能
实体描述的.edmx *:
<的EntityType名称=用户>
<关键>
< PropertyRef名称=标识符/>
< / Key与GT;
<属性名称=标识符TYPE =BIGINT可空=假
StoreGeneratedPattern =身份/>
<属性名称=名称TYPE =nvarchar的可空=假MAXLENGTH =32/>
<属性名=PasswordHashCode1TYPE =INT可空=假/>
<属性名=PasswordHashCode2TYPE =INT可空=假/>
<属性名=CreateDateTimeTYPE =DATETIME2可空=假
StoreGeneratedPattern =计算/>
< /&的EntityType GT;
我不知道这是否适用于你的情况 - ,但如果你想读元
在运行时 - 从的EntityFramework模型
您可以尝试在我先前的职位(由OP,进一步完善)这里所说的一些东西......
这约的DbContext
会谈(你可以从任何一面工作,这样也适用于你) - 但具体而言,刚拿到 ObjectContext的
- 并继续从这点......
VAR容器= objectContext.MetadataWorkspace.GetEntityContainer( objectContext.DefaultContainerName,DataSpace.CSpace);
//,只是让你开始...
VAR baseset = ObjectContext的
.MetadataWorkspace
.GetEntityContainer(objectContext.DefaultContainerName,DataSpace.CSpace)
.BaseEntitySets
。首先(元=> meta.ElementType.Name ==MyBaseClass);
VAR元素类型= ObjectContext的
.MetadataWorkspace
.GetEntityContainer(objectContext.DefaultContainerName,DataSpace.CSpace)
.BaseEntitySets
。首先(元=> meta.ElementType.Name ==MyBaseClass)
.ElementType;
EdmMember成员= elementType.Members [2]; //例如第三个属性
Facet项目;
如果(member.TypeUsage.Facets.TryGetValue(StoreGeneratedPattern,假的,出项))
{
VAR值=((StoreGeneratedPattern)item.Value)== StoreGeneratedPattern.Computed;
}
您获得的 MetadataWorkspace ,你可以从那里工作,你一路下滑。
我们设法提取导航属性等 - 但有可能是每个属性的其他一些信息 - 比如计算
。我还没有尝试过,但它可能的帮助。
另外,我还没有对模型或数据库尝试这第一个 - 但我不明白为什么它不应该工作 - 基础架构是相同的(EF,没有代码先)。
编辑:我添加了一个更具体的代码,让你开始(参见编辑的代码)。那种作品(让你所在的'面'存储),还没有准备好使用的代码,还需要更多的工作。
I'm created ORM by Entity Framework 5.0 (C# 4.5) - database first.
Some properties of entities i'm marked as computed (binded to columns with defaults).
How check by unit test that properties mark as computed in ORM model?
Note: test need for control computed properties after emergency recreate entity in ORM.
Entity description in *.edmx:
<EntityType Name="Users">
<Key>
<PropertyRef Name="Identifier" />
</Key>
<Property Name="Identifier" Type="bigint" Nullable="false"
StoreGeneratedPattern="Identity" />
<Property Name="Name" Type="nvarchar" Nullable="false" MaxLength="32" />
<Property Name="PasswordHashCode1" Type="int" Nullable="false" />
<Property Name="PasswordHashCode2" Type="int" Nullable="false" />
<Property Name="CreateDateTime" Type="datetime2" Nullable="false"
StoreGeneratedPattern="Computed" />
</EntityType>
I'm not sure if this applies to your case - but if you want to read the metadata
at runtime - from the EntityFramework model
you could try a few things mentioned in my earlier post here (and further improved by the OP)...
How I can read EF DbContext metadata programmatically?
That talks about DbContext
(which you can work with from any side, so that also applies to you) - but specifically, just get the ObjectContext
- and continue from this point...
var container = objectContext.MetadataWorkspace.GetEntityContainer(objectContext.DefaultContainerName, DataSpace.CSpace);
// and just to get you started...
var baseset = objectContext
.MetadataWorkspace
.GetEntityContainer(objectContext.DefaultContainerName, DataSpace.CSpace)
.BaseEntitySets
.First(meta => meta.ElementType.Name == "MyBaseClass");
var elementType = objectContext
.MetadataWorkspace
.GetEntityContainer(objectContext.DefaultContainerName, DataSpace.CSpace)
.BaseEntitySets
.First(meta => meta.ElementType.Name == "MyBaseClass")
.ElementType;
EdmMember member = elementType.Members[2]; // e.g. 3rd property
Facet item;
if (member.TypeUsage.Facets.TryGetValue("StoreGeneratedPattern", false, out item))
{
var value = ((StoreGeneratedPattern)item.Value) == StoreGeneratedPattern.Computed;
}
You get the MetadataWorkspace and you can work your way down from there.
We managed to extract navigation properties etc. - but there might be some other info for each property - like calculated
. I haven't tried but it might help.
Also I haven't tried this on the model or database first - but I don't see why it shouldn't work - the infrastructure is the same (EF, not code first).
EDIT: I added a more specific code to get you started (see edited code). That kind of works (gets you where the 'facets' are stored), it isn't ready-to-use code, more work is needed.
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