UI5ReusableCode/BatchErrorParsing at master · krisho007/UI5ReusableCode · GitHub

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    parse: function (oResponse) {
            this._oMessagesModel = new JSONModel({});

            if (typeof oResponse.__batchResponses !== undefined && oResponse.__batchResponses.length > 0) {
                if (typeof oResponse.__batchResponses[0].__changeResponses !== undefined &&
                    oResponse.__batchResponses[0].__changeResponses.length > 0) {
                    if (typeof oResponse.__batchResponses[0].__changeResponses[0].headers !== undefined &&
                        oResponse.__batchResponses[0].__changeResponses[0].headers["sap-message"] !== undefined) {
                        this._oMessagesModel.setData(
                            JSON.parse(oResponse.__batchResponses[0].__changeResponses[0].headers["sap-message"]));
                    }
                }
            }
            return this._oMessagesModel;
        }

        //Add messages to /iwbep/if_message_container in the gateway service (and setting one to be ' iv_is_leading_message')