Exemplo de como usar o method-override para enviar um FORM com POSt e ele mudar para PUT

app-method-override.js

var methodOverride = require('method-override');
// Method Override
app.use(methodOverride(function(req, res){
  if (req.body && typeof req.body === 'object' && '_method' in req.body) {
    // look in urlencoded POST bodies and delete it
    var method = req.body._method
    delete req.body._method
    return method
  }
}));

edit.jade

  form(method='POST', action='/api/beers/#{beer._id}')
    .form-group
      label(for='name') Name:
      input(type='text', name='name', value='#{beer.name}')
    .form-group
      label(for='price') Price:
      input(type='text', name='price', value='#{beer.price}')
    .form-group
      label(for='alcohol') Alcohol:
      input(type='text', name='alcohol', value='#{beer.alcohol}')
    .form-group
      label(for='category') Category:
      input(type='text', name='category', value='#{beer.category}')
    .form-group
      label(for='description') Description:
      textarea(name='description') #{beer.description}
    .form-group
      input(type='submit', value='ALETERAR')
      input(type='hidden', name='_method', value='PUT')