fix(mongoose): allow setting autoCreate as a global option to be co…

…nsistent with `autoIndex`

Fix #9466

lib/index.js

@@ -166,6 +166,7 @@ Mongoose.prototype.driver = require('./driver');
  * - 'typePojoToMixed': true by default, may be `false` or `true`. Sets the default typePojoToMixed for schemas.
  * - 'maxTimeMS': If set, attaches [maxTimeMS](https://docs.mongodb.com/manual/reference/operator/meta/maxTimeMS/) to every query
  * - 'autoIndex': true by default. Set to false to disable automatic index creation for all models associated with this Mongoose instance.
+ * - 'autoCreate': Set to `true` to make Mongoose call [`Model.createCollection()`](/docs/api/model.html#model_Model.createCollection) automatically when you create a model with `mongoose.model()` or `conn.model()`. This is useful for testing transactions, change streams, and other features that require the collection to exist.
  *
  * @param {String} key
  * @param {String|Function|Boolean} value

lib/model.js

@@ -1236,9 +1236,8 @@ Model.init = function init(callback) {
   const Promise = PromiseProvider.get();
   const autoIndex = utils.getOption('autoIndex',
     this.schema.options, this.db.config, this.db.base.options);
-  const autoCreate = this.schema.options.autoCreate == null ?
-    this.db.config.autoCreate :
-    this.schema.options.autoCreate;
+  const autoCreate = utils.getOption('autoCreate',
+    this.schema.options, this.db.config, this.db.base.options);
 
   const _ensureIndexes = autoIndex ?
     cb => this.ensureIndexes({ _automatic: true }, cb) :

lib/validoptions.js

@@ -8,6 +8,7 @@
 const VALID_OPTIONS = Object.freeze([
   'applyPluginsToChildSchemas',
   'applyPluginsToDiscriminators',
+  'autoCreate',
   'autoIndex',
   'bufferCommands',
   'cloneSchemas',