How do you query a many-to-many relationship in Django?

A good example of a many-to-many relationship is the relationship between a sandwich and a sauce . I like a chicken teriyaki sandwich but only if it contains barbeque sauce as well as mayonnaise sauce. So the same sandwich can have multiple sauces.

When querying many-to-many relationships, avoid using multiple filter() methods, make use of Q() objects instead . You can check the SQL query of a QuerySet with str(queryset. query) . Check the performance of recently executed SQL queries with django.

A many-to-many relationship refers to a relationship between tables in a database when a parent row in one table contains several child rows in the second table, and vice versa. … The many-to-many relationship is usually a mirror of the real-life relationship between the objects the two tables represent.

Tips for Using Django’s ManyToManyField