Implemented dajax and moved models to media rather than static

three_d_viewer/models.py

@@ -0,0 +1,44 @@
+from django.db import models
+
+
+class CommonInfo(models.Model):
+    name = models.CharField(max_length=100)
+    active = models.BooleanField(default=True)
+
+    def __unicode__(self):
+        return self.name
+
+    class Meta:
+        abstract = True
+
+
+class Category(CommonInfo):
+    parent = models.ForeignKey('self', blank=True, null=True,
+                               on_delete=models.SET_NULL,
+                               related_name='children')
+
+
+class Sample(CommonInfo):
+    model_filename = models.CharField(max_length=1000)
+    description = models.CharField(max_length=2000, default='', blank=True, null=True)
+    parent = models.ForeignKey(Category, blank=True, null=True,
+                               on_delete=models.SET_NULL)
+
+
+class Question(models.Model):
+    text = models.CharField(max_length=2000)
+    sample = models.ForeignKey(Sample, related_name='questions')
+
+    def correct_answers(self):
+        return self.answers.filter(correct = True)
+    
+    def __unicode__(self):
+        return self.text
+    
+class Answer(models.Model):
+    text = models.CharField(max_length=2000)
+    correct = models.BooleanField(default=False)
+    question = models.ForeignKey(Question, related_name='answers')
+    
+    def __unicode__(self):
+        return self.text