fix dynamodb-toolbox#63 by adding the mapped name to the required list

Author: jeremydaly

classes/Entity.js

@@ -479,7 +479,8 @@ class Entity {
 
     // Check for required fields
     Object.keys(required).forEach(field =>
-      required[field] && !data[field] && error(`'${field}' is a required field`)
+      required[field] && !data[field]
+        && error(`'${field}${this.schema.attributes[field].alias ? `/${this.schema.attributes[field].alias}` : ''}' is a required field`)
     ) // end required field check
 
     // Get partition and sort keys
@@ -773,8 +774,9 @@ class Entity {
 
 
     // Check for required fields
-    Object.keys(required).forEach(field =>
-      required[field] !== undefined && !data[field] && error(`'${field}' is a required field`)
+    Object.keys(required).forEach(field => 
+      required[field] !== undefined && !data[field] 
+        && error(`'${field}${this.schema.attributes[field].alias ? `/${this.schema.attributes[field].alias}` : ''}' is a required field`)
     ) // end required field check
 
     // Checks for partition and sort keys

lib/parseMapping.js

@@ -98,8 +98,8 @@ module.exports = (field,config,track) => {
   if (config.default !== undefined) track.defaults[field] = config.default
 
   // Track required settings
-  if (config.required === true) track.required[field] = false
-  if (config.required === 'always') track.required[field] = true
+  if (config.required === true) track.required[config.map || field] = false
+  if (config.required === 'always') track.required[config.map || field] = true