Merge pull request #10633 from AbdelrahmanHafez/prefer-async-await

get rid of co

Author: vkarpov15

examples/statics/statics.js

@@ -9,34 +9,25 @@ require('./person.js')();
 const Person = mongoose.model('Person');
 
 // connect to a server to do a quick write / read example
-
-mongoose.connect('mongodb://localhost/persons', function(err) {
-  if (err) {
-    throw err;
-  }
-
-  Person.create({ name: 'bill', age: 25, birthday: new Date().setFullYear((new Date().getFullYear() - 25)) },
-    function(err, bill) {
-      if (err) {
-        throw err;
-      }
-      console.log('People added to db: %s', bill.toString());
-
-      // using the static
-      Person.findPersonByName('bill', function(err, result) {
-        if (err) {
-          throw err;
-        }
-
-        console.log(result);
-        cleanup();
-      });
-    }
-  );
-});
-
-function cleanup() {
-  Person.remove(function() {
-    mongoose.disconnect();
+run().catch(console.error);
+
+async function run() {
+  await mongoose.connect('mongodb://localhost/persons');
+  const bill = await Person.create({
+    name: 'bill',
+    age: 25,
+    birthday: new Date().setFullYear((new Date().getFullYear() - 25))
   });
+  console.log('People added to db: %s', bill.toString());
+
+  // using the static
+  const result = await Person.findPersonByName('bill');
+
+  console.log(result);
+  cleanup();
+}
+
+async function cleanup() {
+  await Person.remove();
+  mongoose.disconnect();
 }

lib/document.js

@@ -2074,14 +2074,14 @@ Document.prototype.$isDefault = function(path) {
  * Getter/setter, determines whether the document was removed or not.
  *
  * ####Example:
- *     product.remove(function (err, product) {
- *       product.$isDeleted(); // true
- *       product.remove(); // no-op, doesn't send anything to the db
+ *     const product = await product.remove();
+ *     product.$isDeleted(); // true
+ *     product.remove(); // no-op, doesn't send anything to the db
+ *
+ *     product.$isDeleted(false);
+ *     product.$isDeleted(); // false
+ *     product.remove(); // will execute a remove against the db
  *
- *       product.$isDeleted(false);
- *       product.$isDeleted(); // false
- *       product.remove(); // will execute a remove against the db
- *     })
  *
  * @param {Boolean} [val] optional, overrides whether mongoose thinks the doc is deleted
  * @return {Boolean} whether mongoose thinks this doc is deleted.
@@ -2161,10 +2161,9 @@ Document.prototype.isInit = function(path) {
  *
  * ####Example
  *
- *     Thing.findOne().select('name').exec(function (err, doc) {
- *        doc.isSelected('name') // true
- *        doc.isSelected('age')  // false
- *     })
+ *     const doc = await Thing.findOne().select('name');
+ *     doc.isSelected('name') // true
+ *     doc.isSelected('age')  // false
  *
  * @param {String|Array<String>} path
  * @return {Boolean}