What are Django custom managers and how do I use them?

What are Django custom managers and how do I use them?

Django custom managers are classes that manage database query operations. They allow you to define custom methods for querying your models.

Can you give me an example of how to create a custom manager?

Sure! You can create a custom manager by subclassing models.Manager and adding your custom methods. For example:

class PublishedManager(models.Manager):
    def published(self):
        return self.filter(status='published')

How do I attach this custom manager to a model?

You can attach it by adding it as an attribute in your model class. For example:

class Post(models.Model):
    title = models.CharField(max_length=100)
    status = models.CharField(max_length=10)
    objects = PublishedManager()

Can I use multiple managers in a single model?

Yes, you can define multiple managers in a single model by creating different manager classes and assigning them to different attributes.