Only one assignment record per user

diff --git a/wtem/migrations/0004_auto__add_unique_assignment_user.py b/wtem/migrations/0004_auto__add_unique_assignment_user.py
new file mode 100644 (file)
index 0000000..7730b9d
--- /dev/null
+++ b/wtem/migrations/0004_auto__add_unique_assignment_user.py
@@ -0,0 +1,92 @@
+# -*- coding: 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 'Assignment', fields ['user']
+        db.create_unique(u'wtem_assignment', ['user_id'])
+
+
+    def backwards(self, orm):
+        # Removing unique constraint on 'Assignment', fields ['user']
+        db.delete_unique(u'wtem_assignment', ['user_id'])
+
+
+    models = {
+        u'auth.group': {
+            'Meta': {'object_name': 'Group'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '80'}),
+            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
+        },
+        u'auth.permission': {
+            'Meta': {'ordering': "(u'content_type__app_label', u'content_type__model', u'codename')", 'unique_together': "((u'content_type', u'codename'),)", 'object_name': 'Permission'},
+            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['contenttypes.ContentType']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
+        },
+        u'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': u"orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
+            u'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': u"orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
+            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'})
+        },
+        u'contact.contact': {
+            'Meta': {'ordering': "('-created_at',)", 'object_name': 'Contact'},
+            'body': ('jsonfield.fields.JSONField', [], {'default': '{}'}),
+            'contact': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
+            'form_tag': ('django.db.models.fields.CharField', [], {'max_length': '32', 'db_index': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip': ('django.db.models.fields.IPAddressField', [], {'max_length': '15'})
+        },
+        u'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'}),
+            u'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'})
+        },
+        u'wtem.assignment': {
+            'Meta': {'object_name': 'Assignment'},
+            'exercises': ('jsonfield.fields.JSONField', [], {'default': '{}'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['auth.User']", 'unique': 'True'})
+        },
+        u'wtem.attachment': {
+            'Meta': {'object_name': 'Attachment'},
+            'file': ('django.db.models.fields.files.FileField', [], {'max_length': '100'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'submission': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['wtem.Submission']"})
+        },
+        u'wtem.submission': {
+            'Meta': {'object_name': 'Submission'},
+            'answers': ('django.db.models.fields.CharField', [], {'max_length': '65536', 'null': 'True', 'blank': 'True'}),
+            'contact': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['contact.Contact']", 'null': 'True'}),
+            'email': ('django.db.models.fields.EmailField', [], {'unique': 'True', 'max_length': '100'}),
+            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'key': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'}),
+            'key_sent': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
+        }
+    }
+
+    complete_apps = ['wtem']
\ No newline at end of file

diff --git a/wtem/models.py b/wtem/models.py
index 90492bf..9e67ad8 100644 (file)
--- a/wtem/models.py
+++ b/wtem/models.py
@@ -49,7 +49,7 @@ class Attachment(models.Model):
 
 
 class Assignment(models.Model):
 
 
 class Assignment(models.Model):

-    user = models.ForeignKey(User)
+    user = models.ForeignKey(User, unique = True)

     exercises = JSONField()
 
     def clean(self):
     exercises = JSONField()
 
     def clean(self):