[*] Has Many Relationships - Fix sorting on hasMany fields in related data (#360)

Author: DrRaider

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Change Log
 
 ## [Unreleased]
+### Added
+- Has Many Relationships - Enable sorting on belongsTo relationship columns in related data.
 
 ## RELEASE 5.6.0 - 2020-01-14
 ### Added

src/services/query-builder.js

@@ -65,7 +65,9 @@ function QueryBuilder(model, opts, params) {
 
       if (params.sort.indexOf('.') !== -1) {
         // NOTICE: Sort on the belongsTo displayed field
-        const [associationName, fieldName] = params.sort.split('.');
+        const sortingParameters = params.sort.split('.');
+        const associationName = aliasName ? `${aliasName}->${sortingParameters[0]}` : sortingParameters[0];
+        const fieldName = sortingParameters[1];
         const column = getReferenceField(
           Schemas.schemas,
           (aliasSchema || schema),