adding ngram model class

ngram/models.py

 from django.db import models
+from django.utils import timezone
+from django.contrib.auth.models import User
+
+
+class Ngram(models.Model):
+    terms    = models.TextField(unique=True)
+    n        = models.IntegerField()
+    def __str__(self):
+        return "[%d] %s" % (self.pk, self.terms)
+
+
+class NodeNgram(models.Model):
+    node        = models.ForeignKey(Node)
+    ngram       = models.ForeignKey(Ngram, related_name="nodengram")
+    def __str__(self):
+        return "%s: %s" % (self.node.name, self.ngram.terms)
+
+
+class NodeNgramNgram(models.Model):
+    node        = models.ForeignKey(Node)
+    
+    ngramX      = models.ForeignKey(Ngram, related_name="nodengramngramx")
+    ngramY      = models.ForeignKey(Ngram, related_name="nodengramngramy")
+
+    score       = models.FloatField(default=0)
+
+    def __str__(self):
+        return "%s: %s / %s" % (self.node.name, self.ngramX.terms, self.ngramY.terms)
+
 
-# Create your models here.

node/models.py

@@ -47,22 +47,3 @@ class Document(Node):
 
 
 
-class Ngram(models.Model):
-    terms    = models.TextField(unique=True)
-    n        = models.IntegerField()
-    # post-tag = models.ManyToMany(blank=True)
-    # ajouter une table stem ?
-    def __str__(self):
-        return self.terms
-
-class NodeNgramNgram(models.Model):
-    ngramX      = models.ForeignKey(Ngram, related_name="X")
-    ngramY      = models.ForeignKey(Ngram, related_name="Y")
-
-    node        = models.ForeignKey(Node)
-    score       = models.FloatField(default=0)
-
-    def __str__(self):
-        return self.node
-
-