lesmianator continuations cache fixes

diff --git a/apps/lesmianator/migrations/0003_auto__add_unique_continuations_object_id_content_type.py b/apps/lesmianator/migrations/0003_auto__add_unique_continuations_object_id_content_type.py
new file mode 100644 (file)
index 0000000..102d2f9
--- /dev/null
+++ b/apps/lesmianator/migrations/0003_auto__add_unique_continuations_object_id_content_type.py
@@ -0,0 +1,78 @@
+# encoding: utf-8
+import datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        
+        # Adding unique constraint on 'Continuations', fields ['object_id', 'content_type']
+        db.create_unique('lesmianator_continuations', ['object_id', 'content_type_id'])
+
+
+    def backwards(self, orm):
+        
+        # Removing unique constraint on 'Continuations', fields ['object_id', 'content_type']
+        db.delete_unique('lesmianator_continuations', ['object_id', 'content_type_id'])
+
+
+    models = {
+        'auth.group': {
+            'Meta': {'object_name': 'Group'},
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '80', 'unique': 'True'}),
+            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
+        },
+        'auth.permission': {
+            'Meta': {'ordering': "('content_type__app_label', 'content_type__model', 'codename')", 'unique_together': "(('content_type', 'codename'),)", 'object_name': 'Permission'},
+            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
+        },
+        'auth.user': {
+            'Meta': {'object_name': 'User'},
+            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'email': ('django.db.models.fields.EmailField', [], {'max_length': '75', 'blank': 'True'}),
+            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
+            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'password': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
+            'username': ('django.db.models.fields.CharField', [], {'max_length': '30', 'unique': 'True'})
+        },
+        'contenttypes.contenttype': {
+            'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
+            'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
+        },
+        'lesmianator.continuations': {
+            'Meta': {'unique_together': "(('content_type', 'object_id'),)", 'object_name': 'Continuations'},
+            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'object_id': ('django.db.models.fields.PositiveIntegerField', [], {}),
+            'pickle': ('django.db.models.fields.files.FileField', [], {'max_length': '100'})
+        },
+        'lesmianator.poem': {
+            'Meta': {'object_name': 'Poem'},
+            'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
+            'created_by': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['auth.User']", 'null': 'True'}),
+            'created_from': ('catalogue.fields.JSONField', [], {'null': 'True', 'blank': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'seen_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
+            'slug': ('django.db.models.fields.SlugField', [], {'max_length': '120', 'db_index': 'True'}),
+            'text': ('django.db.models.fields.TextField', [], {}),
+            'view_count': ('django.db.models.fields.IntegerField', [], {'default': '1'})
+        }
+    }
+
+    complete_apps = ['lesmianator']

diff --git a/apps/lesmianator/models.py b/apps/lesmianator/models.py
index 4b3daf8..0a59dde 100644 (file)
--- a/apps/lesmianator/models.py
+++ b/apps/lesmianator/models.py
@@ -100,6 +100,9 @@ class Continuations(models.Model):
     object_id = models.PositiveIntegerField()
     content_object = generic.GenericForeignKey('content_type', 'object_id')
 
+    class Meta:
+        unique_together = (('content_type', 'object_id'), )
+
     def __unicode__(self):
         return "Continuations for: %s" % unicode(self.content_object)
 
@@ -115,7 +118,6 @@ class Continuations(models.Model):
     @classmethod
     def for_book(cls, book, length=3):
         # count from this book only
-        print 'for_book', book
         output = StringIO()
         f = open(book.xml_file.path)
         text.transform(f, output, False, ('raw-text',))
@@ -152,11 +154,12 @@ class Continuations(models.Model):
             should_keys = set(b.pk for b in Book.tagged.with_any((sth,)))
         try:
             obj = cls.objects.get(content_type=object_type, object_id=sth.id)
+            if not obj.pickle:
+                raise cls.DoesNotExist
             f = open(obj.pickle.path)
             keys, conts = cPickle.load(f)
             f.close()
             if set(keys) != should_keys:
-                obj.delete()
                 raise cls.DoesNotExist
             return conts
         except cls.DoesNotExist:
@@ -167,7 +170,7 @@ class Continuations(models.Model):
             else:
                 raise NotImplemented('Lesmianator continuations: only Book and Tag supported')
 
-            c = cls(content_object=sth)
+            c, created = cls.objects.get_or_create(content_type=object_type, object_id=sth.id)
             c.pickle.save(sth.slug+'.p', ContentFile(cPickle.dumps((should_keys, conts))))
             c.save()
             return conts