title: Python, Django, Mongodb: ImportError: No module named bson.objectid
body: <p>I'm following this tutorial exactly. Tried deleting and restarting many times with virtualenv and I'm still getting errors. Is it python, mongodb and django supposed to be this frustrating to set up?</p>
  
  <p><a href="http://docs.mongodb.org/manual/tutorial/write-a-tumblelog-application-with-django-mongodb-engine/" rel="nofollow">http://docs.mongodb.org/manual/tutorial/write-a-tumblelog-application-with-django-mongodb-engine/</a></p>
  
  <p>I get a problem when I try to call</p>
  
  <pre><code>post.save()
  </code></pre>
  
  <p>I then get this error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "&lt;console&gt;", line 1, in &lt;module&gt;
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/base.py", line 460, in save
      self.save_base(using=using, force_insert=force_insert, force_update=force_update)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/base.py", line 553, in save_base
      result = manager._insert(values, return_id=update_pk, using=using)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/manager.py", line 195, in _insert
      return insert_query(self.model, values, **kwargs)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/query.py", line 1436, in insert_query
      return query.get_compiler(using=using).execute_sql(return_id)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/models/sql/query.py", line 213, in get_compiler
      return connection.ops.compiler(self.compiler)(self, connection, using)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/db/backends/__init__.py", line 576, in compiler
      self._cache = import_module(self.compiler_module)
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
      __import__(name)
    File "/Users/marcochiang/Desktop/Development/caesarWorkflow/lib/python2.7/site-packages/django_mongodb_engine/compiler.py", line 18, in &lt;module&gt;
      from bson.objectid import ObjectId
  **ImportError: No module named bson.objectid**
  </code></pre>
  
  <p>Please someone lead me in the right direction. Is there a better tutorial to follow because every single tutorial I follow I run into errors. I'm about to give up on pymongo and django...</p>