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copied!<p>The obvious difference is that in the first case you are passing positional and keyword arguments. If you wonder what arguments <code>Model.save()</code> takes and what they do, the simplest thing is to read the source code. Then you'll find something like:</p> <pre><code>def save(self, force_insert=False, force_update=False, using=None): """ Saves the current instance. Override this in a subclass if you want to control the saving process. The 'force_insert' and 'force_update' parameters can be used to insist that the "save" must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set. """ if force_insert and force_update: raise ValueError("Cannot force both insert and updating in model saving.") self.save_base(using=using, force_insert=force_insert, force_update=force_update) </code></pre> <p>The third argument, <code>using</code>, is not documented, it specifies which db connection you want to use (if you have more than one db connection).</p> <p>To make a long story short:</p> <ul> <li>when you want to save your instance (in a view or form or whatever), you usually just want to let Django handle all this so you call <code>my_model_instance.save()</code> without arguments</li> <li><p>when you override the <code>save</code> method in your Model class, you definitly want to accept <strong>and</strong> pass the same arguments when calling on the base class <code>save</code>, ie:</p> <p>class MyModel(models.Model): def save(self, *args, **kw): do_something_here() super(MyModel, self).save(*args, **kw) do_something_else()</p></li> </ul>

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