moved Volonteer to abstract base class

input/models.py

@@ -2,17 +2,17 @@ from django.db import models
 
 
 class Volonteer(models.Model):
-    name = models.CharField(max_length=200)
-    email = models.CharField(max_length=200)
-    username = models.CharField(max_length=200)
+    realname = models.CharField(max_length=200, null=True)
+    email = models.CharField(max_length=200, null=True)
+    username = models.CharField(max_length=200, null=True)
 
-    def __str__(self):
-        return self.name
+    class Meta:
+        abstract = True
 
-class Project(models.Model):
+class Project(Volonteer):
     name = models.CharField(max_length=200)
     start = models.DateTimeField('start date')
-    contact = models.ForeignKey(Volonteer, on_delete = models.CASCADE, null = True)
+    # contact = models.ForeignKey(Volonteer, on_delete = models.CASCADE, null = True)
 
     def __str__(self):
         return self.name