update models

billard/models.py

@@ -4,13 +4,31 @@ from django.db import models
 class Location(models.Model):
     name = models.CharField(max_length=30, unique=True)
 
+    def __str__(self):
+        return self.name
+
+    def __unicode__(self):
+        return self.name
+
 
 class Client(models.Model):
     id = models.UUIDField(primary_key=True, editable=False)
     location = models.ForeignKey(Location)
 
+    def __str__(self):
+        return self.name
+
+    def __unicode__(self):
+        return self.name
+
 
 class Table(models.Model):
     client = models.ForeignKey(Client)
     number = models.IntegerField()
     name = models.CharField(max_length=30)
+
+    def __str__(self):
+        return self.name
+
+    def __unicode__(self):
+        return self.name