前传和版本信息:
BreezeJS客户端版本:1.5.2
通过设计时EntityFramework模型(6.1.2)在自定义服务器上生成的元数据
BreezeLabs EdmBuilder(1.0.5)
还有生成元数据的问题,可以在这里阅读: How to generate valid metadata from EF DBContext via EdmBuilder for OData v3/BreezeJS
问题/问题:
现在,breeze客户端在解释元数据时抛出错误。
Unable to process returned metadata: A nonnullable DataProperty cannot have a null defaultValue. Name: MySuperDuperEnum
例外情况发生在breeze.debug.js at line 7110 - function parseCsdlSimpleProperty(parentType, csdlProperty, keyNamesOnServer)
。
这里出了什么问题?我有错误的元数据吗?
以下是元数据:
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
<edmx:DataServices m:DataServiceVersion="3.0" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<Schema Namespace="ODataMetaDataGenerator" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
<EntityType Name="MyObject" p5:ClrType="GreatPersistencyNamespace.Model.GreatStuff.MyObject, BreezeEval, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" xmlns:p5="http://schemas.microsoft.com/ado/2013/11/edm/customannotation">
<Key>
<PropertyRef Name="ID"/>
</Key>
<Property Name="ID" Nullable="false" Type="Edm.Int32" p7:StoreGeneratedPattern="Identity" xmlns:p7="http://schemas.microsoft.com/ado/2009/02/edm/annotation"/>
<Property FixedLength="false" MaxLength="Max" Name="Name" Type="Edm.String" Unicode="true"/>
<Property Name="IsActive" Nullable="false" Type="Edm.Boolean"/>
<Property Name="IsGreat" Nullable="false" Type="Edm.Boolean"/>
<Property FixedLength="false" MaxLength="Max" Name="Description" Type="Edm.String" Unicode="true"/>
<Property Name="Address" Nullable="false" Type="ODataMetaDataGenerator.Address"/>
<Property Name="BehaviourType" Nullable="false" Type="ODataMetaDataGenerator.BehaviourType"/>
</EntityType>
<EnumType Name="BehaviourType" UnderlyingType="Edm.Byte" p5:ClrType="GreatPersistencyNamespace.Model.GreatStuff.BehaviourType, BreezeEval, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" xmlns:p5="http://schemas.microsoft.com/ado/2013/11/edm/customannotation">
<Member Name="RUDE" Value="1"/>
<Member Name="KIND" Value="2"/>
<Member Name="UNKNOWN" Value="3"/>
</EnumType>
<EntityContainer Name="TheGreatModelContainer" p5:UseClrTypes="true" xmlns:p5="http://schemas.microsoft.com/ado/2013/11/edm/customannotation" >
<EntitySet EntityType="ODataMetaDataGenerator.MyObject" Name="MyObjects"/>
</EntityContainer>
</Schema>
</edmx:DataServices>
</edmx:Edmx>
错误的确切来源位于breeze.debug.js at line 8597 - constructor of DataProperty
。
必须设置defaultValue,在我的情况下,它尝试从属性dataType中获取默认值。 此时的dataType如下所示:
{
name: "Undefined",
defaultValue: undefined
}
由于line 7091 - var dataType = DataType.fromEdmDataType(csdlProperty.type);
因为csdlProperty看起来像:
{
name: "BehaviourType",
nullable: undefined
type: "ODataMetaDataGenerator.BehaviourType"
}
当然,这不是一个Edm-Type,因此失败了..这里应该使用枚举的基础类型吗?