ODataV4 custom adaptor headers ETag

[Emanuele Filardo]

Hi, my ODataV4 service expose ETag value in @odata.etag field, how can I set his value in request headers?

var customAdaptor = new ej.ODataV4Adaptor().extend({ 

            update: function (dm, keyField, value, tableName) { 

                return { 

                    type: "PATCH", 

                    url: dm.dataSource.url.replace(/\/*$/, tableName ? '/' + tableName : '') + '(\'' + value[keyField] + '\')', 

                    data: JSON.stringify(value), 

                    accept: this.options.accept,

                    headers: { "If-Match": VALUE_OF_ETAG }

                }; 

            } 

        })

Thanks

[Karthikeyan Viswanathan]

Hi Emanuele Filardo,   

  

Thanks for contacting Syncfusion support. 

 

 Please try the below code into your sample: 

<code> 

var customAdaptor = new ej.ODataV4Adaptor().extend({  

            update: function (dm, keyField, value, tableName) { 

                                      dm.dataSource.headers =[{ “If-Match”: VALUE_OF_ETAG }]; 

                return {  

                    type: "PATCH",  

                    url: dm.dataSource.url.replace(/\/*$/, tableName ? '/' + tableName : '') + '(\'' + value[keyField] + '\')',  

                    data: JSON.stringify(value),  

                    accept: this.options.accept 

                };  

            }  

        }) 

</code> 

  

 

 

Regards,  

Karthikeyan V.  

 

[Emanuele Filardo]

Hi, I have problem to get VALUE_OF_ETAG, in the grid I've tried to add odata.etag but is recognized as an "expand" request, and in "value" object is not present.

This is the metadata: {"@odata.context":"https://localhost:44300/api/easycaregiverapi/$metadata#Assistiti","value":[{"@odata.etag":"W/\"YmluYXJ5J0FBQUFBQUFBQ09zPSc=\"","...

[Prince Oliver]

Hi Emanuele,   

  

Thanks for your update.   

  

We were unable to replicate your scenario at our end. Please provide us an issue reproducible sample or code snippet along with replication steps, it will help us provide you a solution.   

  

If you are looking for accessing the header at server side, refer to the below code snippet.   

  

System.Web.HttpContext.Current.Request.Headers["If-Match"];   

 

Regards,   

Prince   

[Emanuele Filardo]

I've found a solution, but I don't know if is the right way:

...

headers: { "If-Match": args.model.selectedRecords[0]["@@odata.etag"] }

...

[Prince Oliver]

Hi Emanuele,     

    

Thanks for your update.     

    

Yes, you can set the value of “odata.etag” to “if-Match” in the header as per your shared code. Also, you can use the datasource headers “dm.dataSource.headers”  as mentioned in previous update to set value of “odata.etag”    

  

Regards,     

Prince