Question

I have a static Object called Module. One of the attributes for a Module object is a 'name'. I have a database table called Section that saves the Module key in a column.

I’d like to fetch the objects from that table and sort by the name of the Module they are related with.

Most of the time, when I reference the Module object, it’s like this: section.module.module_object.name

The model is:

class Section(models.Model):
    page = models.ForeignKey(Page)
    module = models.CharField(db_index=True, max_length=50, choices=[(k, '%s %s' % (s.service, s.name)) for k, s in MODULES.iteritems()])

I’ve tried this:

navigation_links = sorted(navigation_links.values(), key=lambda m: m['module'].module_object.name)

but I get the error AttributeError: 'unicode' object has no attribute 'module_object'

UPDATE: Here is the module object:

class Module(object):

    def __init__(self, key, name):
        self.key = key
        self.name = name

# ... list of a lot of ALL_MODULES

#dict of the above list
MODULES = dict([(s.key, s) for s in ALL_MODULES])

Answer 1

From your code I infer that MODULES is a dictionary of your Module objects, indexed by value by which they are saved in the database. These objects have a name property, so if you modify your example to fetch the object from this dictionary by saved name, you should get what you need:

navigation_links = sorted(navigation_links.values(), 
                          key=lambda m: MODULES[m['module']].name)

Of course, this is all based on my guesses about your code. If this doesn’t work, please provide more information about section and module_object variables.