[NCMB] 任意のクラスの全オブジェクトの値を更新するスクリプト

updateAll.js

module.exports = function saveData(req, res) {

var className = req.body.className;
var fieldName = req.body.fieldName;	
var value = req.body.value;

var NCMB = require('ncmb');
var ncmb = new NCMB('APPLICATION_KEY', 'CLIENT_KEY');

var dataStore = ncmb.DataStore(className);
dataStore.fetchAll()
.then(function(items){
  const promises = [];
  for (var i = 0; i < items.length; i++) {
    items[i].set(fieldName, value);
    promises.push(items[i].update());
  }
  Promise.all(promises)
    .then((ary) => {
      res.send("Succeed: " + className + "." + fieldName + " = " + value + "(" + items.length + ")");
    });
})
.catch(function(error){
  console.log(error);
  res.status(500).send("Error: " + error);
});
}