@sap/xsodata/lib/uri/checks/checkGenKeyRestrictions.js

Expose data from a HANA database as OData V2 service with help of .xsodata files.

'use strict';

var Http501_NotSupported= require('../../utils/errors/http/notSupported');

module.exports = function checkGenKeyRestrictions(context, callback) {

    if (!context.oData.dbSegmentLast.entityType.keys.generatedKey) {
        return callback(null, context);
    }

    if (context.request.method.toLowerCase() !== 'get') {
        return callback(createError(), context);
    } else {
        if (!context.oData.dbSegmentLast.isCollection) {
            return callback(createError(), context);
        }
    }

    return callback(null, context);
};

function createError() {
    var errorMessage = 'GET, PUT/MERGE, DELETE are not allowed for entity requests, ' +
        'where generated local key is defined on the corresponding entity set. ' +
        'In addition POST requests to the entity set are also not allowed.';
    return new Http501_NotSupported(errorMessage);
}