Implementing “day wise task management” system using Django and AngularJS

I have a Task model in Django which looks like the following:

class Task(TimeStampedModel):
    project = models.ForeignKey(Project, related_name='tasks')
    date = models.DateField(_('date'))
    task = models.TextField(_('what\'s the task?'))
    status = models.CharField(
        _('what\'s the status'), default=constants.TASK_STATUS_EMPTY,
        max_length=40, choices=constants.TASK_STATUS_CHOICES)
    status_note = models.TextField(_('write a note about status'), blank=True)

    created_by = models.ForeignKey(User, related_name='created_tasks')
    modified_by = models.ForeignKey(User, related_name='modified_tasks')

    class Meta:
        ordering = ('-created', '-modified')

    def __unicode__(self):
        return self.task

Here is a screenshot of the final implementation:

I have exposed this Task model using django-tastypie as a RESTful api.

On client side, I have used AngularJS for editing/adding tasks.

I need to group tasks by project and date for rendering them properly. I have used _.groupBy method of lodash.js for this.

I wanted to know if there is a better approach to implement same interface.