How to get data without case sensitive from mongo:
searchRequest
   {  asset: '121',
      certificateNumber: '',
      currentDate: '',
      customerPO: '213',
      Area: 'usa',
      serial: '' 
    }
Get records if I enters Area in USA or usa
Code for Search
certificate.find(data).then(function(result) {
    if (!_.isEmpty(result)) {
        successData(RESPONSE.sendResponse(true, true, result, MESSAGE.SUCCESS, STATUS_CODE.OK));
    } else {
        successData(RESPONSE.sendResponse(true, false, null, MESSAGE.DATA_NOT_AVAILABLE, STATUS_CODE.OK));
    }
})  
 
    