Trivialni zobrazovatko TreeNode.

seminar/models.py

@@ -1152,6 +1152,14 @@ class TreeNode(models.Model):
 		blank = True,
 		on_delete=models.SET_NULL,
 		verbose_name="další element na stejné úrovni")
+	
+	def print_tree(self,indent=0):
+		print("{}TreeNode({})".format(" "*indent,self.id))
+		if self.first_child:
+			self.first_child.print_tree(indent=indent+2)
+		if self.succ:
+			self.succ.print_tree(indent=indent)
+		
 
 class RocnikNode(TreeNode):
 	class Meta: