How to assign a record to the current user via JavaScript

Recently I got a requirement from the customer to create a ribbon button on a custom entity so that a user can click on that button and get the record assigned to him/herself. You might wonder why create a ribbon button when we have the “Assign” button clearly. Reason is we need to do some web service calls to external systems too when user click on that button; so we needed a custom ribbon button.

I could achieve this easily by creating a JavaScript function like below to update the owner id and call this function on click of the ribbon button.

function AssignRecordToCurrentUser() {   

    var currentRecordId = Xrm.Page.data.entity.getId().replace("{", '').replace("}", '');

    var currentUserId = Xrm.Page.context.getUserId().replace("{", '').replace("}", '');       

    var entity = {};

    entity["ownerid@odata.bind"] = "/systemusers(" + currentUserId + ")";   

    var req = new XMLHttpRequest();

    req.open("PATCH", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/new_workitems(" + currentRecordId + ")", false); // my entity name is new_workitem

    req.setRequestHeader("OData-MaxVersion", "4.0");

    req.setRequestHeader("OData-Version", "4.0");

    req.setRequestHeader("Accept", "application/json");

    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");   

    req.onreadystatechange = function () {

        if (this.readyState === 4) {

            debugger;

            req.onreadystatechange = null;

            if (this.status === 204) {

                //Success - No Return Data - Do Something

            } else {

                Xrm.Utility.alertDialog(this.statusText);

            }

        }

    };

    req.send(JSON.stringify(entity));

} 

This works fine as long as the current user has got the write privileges to the entity. If the current user has read only rights this throws an exception. So when I was searching the web I found that we need to pass an additional parameter and impersonate the call. So I used the GUID of a system administrator like below.

function AssignRecordToCurrentUser() {

    var currentRecordId = Xrm.Page.data.entity.getId().replace("{", '').replace("}", '');

    var currentUserId = Xrm.Page.context.getUserId().replace("{", '').replace("}", '');

    var entity = {};

    entity["ownerid@odata.bind"] = "/systemusers(" + currentUserId + ")";

    var impersonateUserId = "A734DA29-7993-DE11-BECE-005056B47DB0";// GUID of the system administrator

    var req = new XMLHttpRequest();

    req.open("PATCH", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/new_workitems(" + currentRecordId + ")", false);// my entity name is new_workitem

    req.setRequestHeader("OData-MaxVersion", "4.0");

    req.setRequestHeader("OData-Version", "4.0");

    req.setRequestHeader("Accept", "application/json");

    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");

    req.setRequestHeader("MSCRMCallerID", impersonateUserId);

    req.onreadystatechange = function () {

        if (this.readyState === 4) {

            debugger;

            req.onreadystatechange = null;

            if (this.status === 204) {

                //Success - No Return Data - Do Something

            } else {

                Xrm.Utility.alertDialog(this.statusText);

            }

        }

    };

    req.send(JSON.stringify(entity));

}

But this did not work either. L

So I came up with another idea!!

I created an action to assign the record and then called that action from the JavaScript function. Here in this action I am passing the current user as an input parameter to the action.

My action looks like below:

This is the parameter:

And the JavaScript to call the action is like this:

function AssignRecordToCurrentUser () {

    debugger;

    var currentRecordIdString = Xrm.Page.data.entity.getId();

    var currentRecordId = currentRecordIdString.replace("{", '').replace("}", '');

    var currentUserId = Xrm.Page.context.getUserId().replace("{", '').replace("}", '');

    var entityName = "new_workitem";

    ////using action

    debugger;

    var parameters = {};

    var currentuser = {};                                      

    currentuser.systemuserid = currentUserId;

    currentuser["@odata.type"] = "Microsoft.Dynamics.CRM.systemuser";

    parameters.CurrentUser = currentuser;

    var req = new XMLHttpRequest();

    req.open("POST", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/new_workitems(" + currentRecordId + ")/Microsoft.Dynamics.CRM.new_Assignworkitemtocurrentuser", false);

    req.setRequestHeader("OData-MaxVersion", "4.0");

    req.setRequestHeader("OData-Version", "4.0");

    req.setRequestHeader("Accept", "application/json");

    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");

    req.onreadystatechange = function () {

        if (this.readyState === 4) {

            req.onreadystatechange = null;

            if (this.status === 204) {

                debugger;

                //Success - No Return Data - Do Something

            } else {

                debugger;

                Xrm.Utility.alertDialog(this.statusText);

            }

        }

    };

    req.send(JSON.stringify(parameters));

}

Make sure you activate your action.

I hope this will help you!