How to get Odata Response without Etag using Microsoft.AspNet.OData

Question

User-1243834164 posted

As per my requirement whenever I am calling ODATA V4 controller get request, from ajax I don't want to get Odata.Etag from response. 

How can we achieve this. Is there any Web Api Odata server side configuration to disable Etags? 

"@odata.context": "http://localhost:56274/odata/$metadata#Controller",
"@odata.count": 1,
"value": [{
"@odata.etag": "W/\"YmluYXJ5J0FBQUFBRnFFUUE4PSc=\"",

Answer 1

User283571144 posted

Hi evurihanumantharao,

How can we achieve this. Is there any Web Api Odata server side configuration to disable Etags? 

As far as I know, if don't enable the  [TimeStamp] attribute or the [ConcurrencyCheck]attribute in your data model. 

It will not add the etag in the response.

So I suggest you could recheck your model to make sure you don't add the attribute.

Here I also create an example with etag in odata v4.

The data model.

    public class Person
    {
        [Key]
        public int Id { get; set; }
        [Required]
         public string Name { get; set; }
        [Required]
        [Timestamp]
        public int Age { get; set; }
    }

Result:

If I remove the "[Timestamp]" or " [ConcurrencyCheck]", it will not generate the etag.

Best Regards,

Brando

Answer 2

User-1243834164 posted

Thanks for your response.

If I change the TimeStamp/ConcurrencyCheck that will impact on my entity framework behavior. I am looking for the option which can work at Odata Level.  I need to eliminate this tag from Odata responses.

Answer 3

User-166373564 posted

Hi, 

Either use either the [TimeStamp] attribute or the [ConcurrencyCheck] attribute but not both.

See the "Support for ETags" section in this MSDN blog post. 

https://blogs.msdn.microsoft.com/webdev/2014/03/13/getting-started-with-asp-net-web-api-2-2-for-odata-v4-0/

Regards,

Angie 

Answer 4

User-1101824297 posted

For anyone else stumbling across this post, we found that adding an [IgnoreDataMember] attribute to the property solves this (unless you absolutely need the property with the Timestamp attribute in your response)