WIP: ensureIndex

lib/datastore.js

@@ -125,12 +125,17 @@ class Datastore extends EventEmitter {
    * @param {Function} callback Optional callback, signature: err
    */
   ensureIndex (options = {}, callback = () => {}) {
+    callbackify(this.ensureIndexAsync.bind(this))(options, callback)
+  }
+
+  async ensureIndexAsync (options = {}) {
+    console.log('exec now')
     if (!options.fieldName) {
       const err = new Error('Cannot create an index without a fieldName')
       err.missingFieldName = true
-      return callback(err)
+      throw err
     }
-    if (this.indexes[options.fieldName]) return callback(null)
+    if (this.indexes[options.fieldName]) return
 
     this.indexes[options.fieldName] = new Index(options)
     if (options.expireAfterSeconds !== undefined) this.ttlIndexes[options.fieldName] = options.expireAfterSeconds // With this implementation index creation is not necessary to ensure TTL but we stick with MongoDB's API here
@@ -139,14 +144,11 @@ class Datastore extends EventEmitter {
       this.indexes[options.fieldName].insert(this.getAllData())
     } catch (e) {
       delete this.indexes[options.fieldName]
-      return callback(e)
+      throw e
     }
 
     // We may want to force all options to be persisted including defaults, not just the ones passed the index creation function
-    this.persistence.persistNewState([{ $$indexCreated: options }], err => {
-      if (err) return callback(err)
-      return callback(null)
-    })
+    await this.persistence.persistNewStateAsync([{ $$indexCreated: options }])
   }
 
   /**