change ForeignKey with unique=True to OneToOneField

misfitapp/migrations/0006_fkunique_to_onetoone

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2016-11-03 16:26
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('misfitapp', '0005_help_text'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='profile',
+            name='user',
+            field=models.OneToOneField(help_text=b"The profile's user", on_delete=django.db.models.deletion.CASCADE, related_name='misfit_profile', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

misfitapp/models.py

@@ -155,8 +155,10 @@ class Profile(MisfitModel):
     """
     GENDER_TYPES = (('male', 'male'), ('female', 'female'))
 
-    user = models.ForeignKey(
-        UserModel, unique=True, help_text="The profile's user")
+    user = models.OneToOneField(
+        UserModel,
+        related_name='misfit_profile',
+        help_text="The profile's user")
     email = models.EmailField(null=True, blank=True, help_text='Email address')
     birthday = models.DateField(help_text="The user's birth date")
     gender = models.CharField(