如何在OData中排除节点

Question

I have a Odata response structure as below,

{
"value": [{
    "a": "10",
    "b": "10",
    "c": "10",
    "Description": null,
    "ExtendedValues": [{
        "x1": "val1",
        "y1": "val2",
        "z1": "val3"
    },
    {
        "x2": "val1",
        "y2": "val2",
        "z2": "val3"
    },
    {
        "x3": "val1",
        "y3": "val2",
        "z3": "val3"
    },
    ],
}]

}

I just want to know if there is a way to exclude a specific node from the response. For ex i need to exclude ExtendedValues from the response. Although i could do it by using $select and provide all the required properties.

Answer 1

There are several ways to do so:

1 Use IgnoreDataMember in ConventionModelBuilder. In the WebApiConfig.cs file

ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
builder.EntityType<Person>().Ignore(p => p.Description);

Then the property Description will be excluded, BUT it will also disappear in $metadata

2 You can always make such thing work by defining an unbound function to return the value you like. Please refer the sample

3 If you have a lot of business logic, you may try RESTier -- a framework built on Web API OData and makes business logic easy to implement. More can be seen at http://odata.github.io/RESTier/ . You can follow the tutorial of Getting-started 2, entity set filter . But currently, RESTier is still a preview version.