function getTasks() {
    return $http({
        method: 'Get',
        url: _spPageContextInfo.webServerRelativeUrl + "/_api/SP.AppContextSite(@target)/web/lists/getByTitle('TasksList')/items?$select=*,ProjectTitle/Title,ProjectTitle/Id,ResponsiblePersons/Id,ResponsiblePersons/Title,Attachments,AttachmentFiles,TaskRequestor/Id,TaskRequestor/Title&$expand=ProjectTitle,ResponsiblePersons,AttachmentFiles,TaskRequestor&$top=9999&@target='" + spContext.hostWebUrl + "'",
        headers: {
            'Accept': 'application/json;odata=verbose',
        }
    });
}