问NodeJS如何通过输入特定值获取数据

EN

server.get('/i/artists/:letter', myartists.getArtistByLetter);

exports.getArtistByLetter = function(req, res, next){

   var where;

   if(req.query == '0-9') // not sure about req.query, probably wrong???
   {
      where = ["formated_name RLIKE '^[0-9#]' AND artist_parent_id = 0 "];
   }
   else  
   {
      where = ["formated_name LIKE '"+req.query+"%' AND artist_parent_id = 0"];
   }    

   db.artist.findAll({ 
      where: where, 
      attributes: ['artist_id', ['formated_name', 'name'], 'uuid', 'slug']
    }, {raw: true})
    .success(function(artist){
       res.json({data: artist});
   });  

}