[FIXED] django iterate through model objects that contain another particular model object in a ManyToManyField

Issue

I have the following models in my django app.

class author(models.Model):
    name=models.CharField(max_length=100)

class book(models.Model):
    name=models.TextField()
    authors=models.ManyToManyField(author)

A author definately have written multiple books. A single book can also have multiple authors.

I want to iterate through all books by a particular author. Till now I have tried

for b in book.objects.filter(authors__name='HiDe'):
    print(b)

which gives AttributeError: 'function' object has no attribute 'objects' probably because authors in book is a ManyToManyField.

Adding books=models.ManyToManyField(author) will make the database large and cumbersome to manage as an author can have too many books, so this is not the solution I want.

Solution

How do you define the book?
It seems it is just a function. Not a model object.
The error tells you books doesn't have the attribute objects, and is a function.

It is also generally good practice to capitalise the first letter of Django models.

Answered By - nigel239