Call associate/disassociate by JS using Web API in Dynamics 365

Call associate/disassociate by JS using latest Web API

//--***********************************************************************************************//
//-- [[-- Start --]] Associate/DisAssociate records in N-to-N relationship by Using Web API
//--***********************************************************************************************//

function getEntityPluralName(entityName) {
    var pluralName = '';
    if (entityName.toUpperCase() == 'SYSTEMUSER') {
        pluralName = 'systemusers';
    }
    else if (entityName.toUpperCase() == 'ROLE') {
        pluralName = 'roles';
    }
    if (entityName.toUpperCase() == 'CONTACT') {
        pluralName = 'contacts';
    }
    if (entityName.toUpperCase() == 'ACCOUNT') {
        pluralName = 'accounts';
    }
    else if (entityName.toUpperCase() == 'SALESORDER') {
        pluralName = 'salesorders';
    }
    return pluralName;
}

function associateManyToManyRecord_Async_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName) {
    var primaryEntityPluralName = getEntityPluralName(primaryEntityName);
    var relatedEntityPluralName = getEntityPluralName(relatedEntityName);
    primaryEntityId = primaryEntityId.replace(/\{|\}/gi, '');
    relatedEntityId = relatedEntityId.replace(/\{|\}/gi, '');

    var association = {};
    association["@odata.id"] = Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + relatedEntityPluralName + "(" + relatedEntityId + ")";

    var req = new XMLHttpRequest();
    req.open("POST", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + primaryEntityPluralName + "(" + primaryEntityId + ")/" + n2nRelationName + "/$ref", true);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");

    req.onreadystatechange = function () {
        if (this.readyState === 4) {
            debugger;
            req.onreadystatechange = null;
            if (this.status === 204 || this.status === 1223) {
                //Success - No Return Data - Do Something
            }
            else if (this.status === 412) {
                if (this.responseText != null && this.responseText != undefined) {
                    var errorResponse = JSON.parse(this.responseText);
                    if (errorResponse['error'] != null && errorResponse['error'] != undefined) {
                        if (errorResponse['error']['message'] != null && errorResponse['error']['message'] != undefined) {
                            var errorMessage = errorResponse['error']['message'];
                            alert(errorMessage);//-- 'A record with matching key values already exists.'
                            //if (errorMessage == 'A record with matching key values already exists.') {
                            //    disassociateManyToManyRecords_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);
                            //}
                        }
                    }
                }
            }
            else {
                //parent.Xrm.Utility.alertDialog(this.statusText);
            }
        }
    };

    req.send(JSON.stringify(association));
}

function associateManyToManyRecord_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName) {
    var primaryEntityPluralName = getEntityPluralName(primaryEntityName);
    var relatedEntityPluralName = getEntityPluralName(relatedEntityName);
    primaryEntityId = primaryEntityId.replace(/\{|\}/gi, '');
    relatedEntityId = relatedEntityId.replace(/\{|\}/gi, '');

    var association = {};
    association["@odata.id"] = Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + relatedEntityPluralName + "(" + relatedEntityId + ")";

    var req = new XMLHttpRequest();
    req.open("POST", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + primaryEntityPluralName + "(" + primaryEntityId + ")/" + n2nRelationName + "/$ref", false);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.send(JSON.stringify(association));

    debugger;
    if (req.status === 204 || this.status === 1223) {
        //Success - No Return Data - Do Something
    }
    else if (req.status === 412) {
        if (req.responseText != null && this.req != undefined) {
            var errorResponse = JSON.parse(req.responseText);
            if (errorResponse['error'] != null && errorResponse['error'] != undefined) {
                if (errorResponse['error']['message'] != null && errorResponse['error']['message'] != undefined) {
                    var errorMessage = errorResponse['error']['message'];
                    alert(errorMessage);//-- 'A record with matching key values already exists.'
                    //if (errorMessage == 'A record with matching key values already exists.') {
                    //    disassociateManyToManyRecords_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);
                    //}
                }
            }
        }
    }
    else {
        //parent.Xrm.Utility.alertDialog(this.statusText);
    }
}

function disassociateManyToManyRecords_Async_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName) {
    debugger;
    var primaryEntityPluralName = getEntityPluralName(primaryEntityName);
    var relatedEntityPluralName = getEntityPluralName(relatedEntityName);
    primaryEntityId = primaryEntityId.replace(/\{|\}/gi, '');
    relatedEntityId = relatedEntityId.replace(/\{|\}/gi, '');

    var req = new XMLHttpRequest();
    req.open("DELETE", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + primaryEntityPluralName + "(" + primaryEntityId + ")/" + n2nRelationName + "(" + relatedEntityId + ")/$ref", true);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");

    req.onreadystatechange = function () {
        if (this.readyState === 4) {
            debugger;
            req.onreadystatechange = null;
            debugger;
            if (this.status === 204 || this.status === 1223) {
                //Success - No Return Data - Do Something
                //successUpdateCallback();
            } else {
                //Xrm.Utility.alertDialog(this.statusText);
                var errorMsg = 'Some error occurred while disassociating records.';
            }
        }
    };
    req.send();
}

function disassociateManyToManyRecords_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName) {
    debugger;
    var primaryEntityPluralName = getEntityPluralName(primaryEntityName);
    var relatedEntityPluralName = getEntityPluralName(relatedEntityName);
    primaryEntityId = primaryEntityId.replace(/\{|\}/gi, '');
    relatedEntityId = relatedEntityId.replace(/\{|\}/gi, '');

    var req = new XMLHttpRequest();
    req.open("DELETE", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/" + primaryEntityPluralName + "(" + primaryEntityId + ")/" + n2nRelationName + "(" + relatedEntityId + ")/$ref", false);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.send();

    debugger;
    if (req.status === 204 || req.status === 1223) {
        //Success - No Return Data - Do Something
        //successUpdateCallback();
    } else {
        //Xrm.Utility.alertDialog(this.statusText);
        var errorMsg = 'Some error occurred while disassociating records.';
        alert(errorMsg);
    }
}

//--***********************************************************************************************//
//-- [[-- End --]] Associate/DisAssociate records in N-to-N relationship by Using Web API
//--***********************************************************************************************//

Testing associate/disassociate

function testAssociation() {
    debugger;
    ////-- Set params for Web API Call
    //var primaryEntityName = 'account';
    //var primaryEntityId = '09DE1546-51E7-E311-9408-005056BD2B49';
    //var relatedEntityName = 'contact';
    //var relatedEntityId = '0AE8BB9B-97E9-E311-940D-005056BD2B49';
    //var n2nRelationName = 'new_account_contact';

    //-- Test Associate operation by Web API
    //associateManyToManyRecord_Async_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);
    //associateManyToManyRecord_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);

    //-- Test Disassociate operation by Web API
    //disassociateManyToManyRecords_Async_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);
    //disassociateManyToManyRecords_Sync_ByWebAPI(primaryEntityName, primaryEntityId, relatedEntityName, relatedEntityId, n2nRelationName);

}