Mercurial > personas_backend

changeset 10:fd3e24f5ba18

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Added some meta information to models, made save() method of Revision raise an error if client code attempts to modify a revision.
author Atul Varma <varmaa@toolness.com>
date Fri, 15 Feb 2008 04:24:00 -0600
parents d7e7916c7c34
children 2b9ce9a2ba72
files PersonasBackend/personas/models.py
diffstat 1 files changed, 32 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/PersonasBackend/personas/models.py	Thu Feb 14 23:28:48 2008 -0600
+++ b/PersonasBackend/personas/models.py	Fri Feb 15 04:24:00 2008 -0600
@@ -11,9 +11,13 @@
         return self.name
 
 class Category(models.Model):
+    class Meta:
+        verbose_name_plural = "categories"
+
     name = models.CharField(
         "Category name",
         maxlength=50,
+        unique=True,
         )
 
     def __str__(self):
@@ -119,6 +123,7 @@
         choices=(("published", "Published"),
                  ("deleted", "Deleted")),
         blank=False,
+        default="published",
         )
 
     def __str__(self):
@@ -176,8 +181,7 @@
 
           >>> p = Persona(name='Test Persona',
           ...             description='Thos is a test.',
-          ...             category=Category.objects.get(name='General'),
-          ...             status='published')
+          ...             category=Category.objects.get(name='General'))
           >>> p.save()
           >>> p.revision
           0
@@ -202,6 +206,9 @@
         super(Persona, self).save()
 
 class Revision(models.Model):
+    class Meta:
+        unique_together = (("revision_of", "revision"),)
+
     # Auto-generated fields
 
     revision_of = models.ForeignKey(
@@ -270,3 +277,26 @@
 
     def __str__(self):
         return "%s - r%s" % (self.revision_of.name, self.revision)
+
+    def save(self):
+        """
+        The save method for a Revision can only be called once,
+        because Revision objects are meant to be immutable:
+
+          >>> p = Persona(name='Test Persona',
+          ...             category=Category.objects.get(name='General'))
+          >>> p.save()
+          >>> p.description = 'This is a test.'
+          >>> p.save()
+          >>> r = p.revisions.get(revision=0)
+          >>> r.status = "deleted"
+          >>> r.save()
+          Traceback (most recent call last):
+          ...
+          AssertionError: Revisions are immutable
+        """
+
+        if self.id == None:
+            super(Revision, self).save()
+        else:
+            raise AssertionError( "Revisions are immutable" )