如何使用OData在单个POST请求中正确创建和链接一对一关系

Question

在OData:Operations文档的第2.4节第4段中,它在使用POST创建实体时读取,也可以在同一请求中创建链接.但是,我在努力完成这项工作时遇到了麻烦.关于创建时的多对多链接也有类似的问题,如果没有批量请求,看起来不可能出现特定情况.下面是我尝试使用此示例OData读写服务创建的场景.

创建一个名为"Test Product"的新产品,并使用JSON在单个POST中将其链接到Category(0).

我试过了...

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json


{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category":"http://services.odata.org/OData/OData.svc/Categories(0)" }

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json

{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category": {"uri": "http://services.odata.org/OData/OData.svc/Categories(0)"} }

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json


{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category":"http://services.odata.org/OData/OData.svc/Categories(0)" }

和......

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json


{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category": {"uri": "http://services.odata.org/OData/OData.svc/Categories(0)"} }

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json

{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category":"http://services.odata.org/OData/OData.svc/Categories(0)" }

POST /OData/OData.svc/Products HTTP/1.1
Accept: application/json
Content-Type: application/json


{ "ID": 99, "Name": "Test Product", "Description": "Simple Test", "ReleaseDate": "\/Date(1210204800000)\/", "DiscontinuedDate": null, "Rating": 3, "Price": "99.99", "Category": {"uri": "http://services.odata.org/OData/OData.svc/Categories(0)"} }

两者都会导致失败.

使用原子格式的另一个例子

<?xml version="1.0" encoding="utf-8"?>
<entry xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom">
    <title type="text"/>
    <updated>2010-02-27T21:36:47Z</updated>
    <author>
        <name/>
    </author>
    <Link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Category" type="application/atom+xml;type=Entry" title="Category" href="Categories(0)"/>
    <category term="ODataDemo.Product" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme"/>
    <content type="application/xml">
        <m:properties>
            <d:ID m:type="Edm.Int32">99</d:ID>
            <d:Name m:type="Edm.String">New Product</d:Name>
            <d:ReleaseDate m:type="Edm.DateTime">1992-01-01T00:00:00</d:ReleaseDate>
            <d:DiscontinuedDate m:type="Edm.DateTime" m:null="true"/>
            <d:Rating m:type="Edm.Int32">4</d:Rating>
            <d:Price m:type="Edm.Decimal">2.5</d:Price>
        </m:properties>
    </content>
</entry>

上面的结果是创建了201,但没有为链接到现有类别的新产品创建关联.

任何帮助,将不胜感激.提前致谢.

Answer 1

微软的Pablo Castro回答了我的问题.他在Atom有效载荷中建议我将大写"L"改为小写.IE浏览器.

<link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Category" type="application/atom+xml;type=entry" title="Category" href="Categories(0)"/>

对于JSON有效负载,您需要包含"__metadata"才能使其正常工作.IE浏览器.

{
 Prop1: ...,
 Prop2: ...,
 LinkProp1: { __metadata: { uri: "http://..." } }
}