Implemented hasOne destroy()

lib/relation-definition.js

@@ -1431,8 +1431,14 @@ HasOne.prototype.update = function (targetModelData, cb) {
 };
 
 HasOne.prototype.destroy = function (cb) {
-  
+  this.fetch(function(err, inst) {
-
+    if (inst instanceof ModelBaseClass) {
+      inst.destroy(cb);
+    } else {
+      cb(new Error('HasOne relation ' + definition.name
+        + ' is empty'));
+    }
+  });
 };
 
 /**

test/relations.test.js

@@ -1269,6 +1269,29 @@ describe('relations', function () {
       });
     });
     
+    it('should destroy the related item on scope', function(done) {
+      Supplier.findById(supplierId, function(e, supplier) {
+        should.not.exist(e);
+        should.exist(supplier);
+        supplier.account.destroy(function(err) {
+          should.not.exist(e);
+          done();
+        });
+      });
+    });
+    
+    it('should get the related item on scope - verify', function(done) {
+      Supplier.findById(supplierId, function(e, supplier) {
+        should.not.exist(e);
+        should.exist(supplier);
+        supplier.account(function(err, act) {
+          should.not.exist(e);
+          should.not.exist(act);
+          done();
+        });
+      });
+    });
+    
   });
 
   describe('hasAndBelongsToMany', function () {