MySQL表一个全局变量，ejs和nodejs

Question

I'm trying to figure out how I can make a global variable that can grab from a mysql table.

app.get('*', function(req, res, next){
  res.locals.user = req.user || null;
  res.locals.mobs = db.query('SELECT * FROM mobs', function(err, rows){
    var rowLength = rows.length;
    for (var i = 0; i < rowLength; i++) {
      var mobs = rows[i];
    }
  });

The mobs ones is what I am trying to do. using <%= mobs[0].name %> produces aa cant get from undefined.

Answer 1

I think you need this

db.query('SELECT * FROM mobs', function(err, rows){
      res.locals.mobs = rows
  });

if you want pass the data to template try this

db.query('SELECT * FROM mobs', function(err, rows){
               res.render('view.ejs',{mob:rows})
          });

Answer 2

I found an answer! I am not sure if it is the most efficient, but here it is:

app.use(function(req, res, next) {
  res.locals.errors = null;
  // Mob Database
  db.query('SELECT * FROM mobs', function(err, rows){
    req.mobs = rows;
    res.locals.mobs = req.mobs;
  });
  next();
});