Markov: field changes: uniqueness, max_length

markov/migrations/0002_unique_target_name_and_context_name.py

@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Deleting field 'MarkovTarget.target'
+        db.delete_column(u'markov_markovtarget', 'target')
+
+        # Adding field 'MarkovTarget.name'
+        db.add_column(u'markov_markovtarget', 'name',
+                      self.gf('django.db.models.fields.CharField')(default='', unique=True, max_length=64),
+                      keep_default=False)
+
+        # Adding unique constraint on 'MarkovContext', fields ['name']
+        db.create_unique(u'markov_markovcontext', ['name'])
+
+
+    def backwards(self, orm):
+        # Removing unique constraint on 'MarkovContext', fields ['name']
+        db.delete_unique(u'markov_markovcontext', ['name'])
+
+        # Adding field 'MarkovTarget.target'
+        db.add_column(u'markov_markovtarget', 'target',
+                      self.gf('django.db.models.fields.CharField')(default='', max_length=64),
+                      keep_default=False)
+
+        # Deleting field 'MarkovTarget.name'
+        db.delete_column(u'markov_markovtarget', 'name')
+
+
+    models = {
+        u'markov.markovcontext': {
+            'Meta': {'object_name': 'MarkovContext'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '32'})
+        },
+        u'markov.markovstate': {
+            'Meta': {'unique_together': "(('context', 'k1', 'k2', 'v'),)", 'object_name': 'MarkovState'},
+            'context': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['markov.MarkovContext']"}),
+            'count': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'k1': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'k2': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'v': ('django.db.models.fields.CharField', [], {'max_length': '128'})
+        },
+        u'markov.markovtarget': {
+            'Meta': {'object_name': 'MarkovTarget'},
+            'chatter_chance': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'context': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['markov.MarkovContext']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '64'})
+        }
+    }
+
+    complete_apps = ['markov']

markov/migrations/0003_markov_context_max_length_64.py

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+
+        # Changing field 'MarkovContext.name'
+        db.alter_column(u'markov_markovcontext', 'name', self.gf('django.db.models.fields.CharField')(unique=True, max_length=64))
+
+    def backwards(self, orm):
+
+        # Changing field 'MarkovContext.name'
+        db.alter_column(u'markov_markovcontext', 'name', self.gf('django.db.models.fields.CharField')(max_length=32, unique=True))
+
+    models = {
+        u'markov.markovcontext': {
+            'Meta': {'object_name': 'MarkovContext'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '64'})
+        },
+        u'markov.markovstate': {
+            'Meta': {'unique_together': "(('context', 'k1', 'k2', 'v'),)", 'object_name': 'MarkovState'},
+            'context': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['markov.MarkovContext']"}),
+            'count': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'k1': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'k2': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'v': ('django.db.models.fields.CharField', [], {'max_length': '128'})
+        },
+        u'markov.markovtarget': {
+            'Meta': {'object_name': 'MarkovTarget'},
+            'chatter_chance': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'context': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['markov.MarkovContext']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '64'})
+        }
+    }
+
+    complete_apps = ['markov']

markov/models.py

@@ -15,7 +15,7 @@ class MarkovContext(models.Model):
 
     """Define contexts for Markov chains."""
 
-    name = models.CharField(max_length=32)
+    name = models.CharField(max_length=64, unique=True)
 
     def __unicode__(self):
         """String representation."""
@@ -27,11 +27,16 @@ class MarkovTarget(models.Model):
 
     """Define IRC targets that relate to a context, and can occasionally be talked to."""
 
-    target = models.CharField(max_length=64)
+    name = models.CharField(max_length=64, unique=True)
     context = models.ForeignKey(MarkovContext)
 
     chatter_chance = models.IntegerField(default=0)
 
+    def __unicode__(self):
+        """String representation."""
+
+        return u"{0:s}".format(self.name)
+
 
 class MarkovState(models.Model):