Add conditional extension providing handler for HasOneEdit compatibility

_config/hasoneedit.yml

@@ -0,0 +1,9 @@
+---
+Name: fromholdio-minigridfield-hasoneedit
+Only:
+  moduleexists: stevie-mayhew/hasoneedit
+---
+
+Fromholdio\MiniGridField\Forms\MiniGridField:
+  extensions:
+    fioHasOneEditMiniGridField: Fromholdio\MiniGridField\Extensions\HasOneEditMiniGridFieldExtension

src/Extensions/HasOneEditMiniGridFieldExtension.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Fromholdio\MiniGridField\Extensions;
+
+use SGN\HasOneEdit\HasOneEdit;
+use SilverStripe\Core\Extension;
+
+class HasOneEditMiniGridFieldExtension extends Extension
+{
+    public function updateRelationName(&$name)
+    {
+        if (HasOneEdit::isHasOneEditField($name)) {
+            list($parentRelationName, $name) = HasOneEdit::getRelationNameAndField($name);
+        }
+    }
+}