Django: How to save data to ManyToManyField?

Question

I have a question concerning the following model. I want to populate the ManyToManyField from views.py instead of doing it from the Admin.

But how do I add data to the genres field which is the ManyToManyField?

views.py

content = Movie_Info(id = m_id,                     title = data[0].get('title'),                     overview = data[0].get('overview'),                     release_date = data[0].get('release_date'),                 ) content.save() 

models.py

class Movie_Info_genre(models.Model):     genre = models.CharField(max_length=100)  class Movie_Info(models.Model):     id             = models.IntegerField(primary_key=True)     title          = models.CharField(max_length=100, blank=True, null=True)     overview       = models.TextField(blank=True, null=True)     release_date   = models.CharField(max_length=10, blank=True, null=True)     genres         = models.ManyToManyField(Movie_Info_genre) 

Answer 1

Use the add method for related fields:

# using Model.object.create is a shortcut to instantiating, then calling save() myMoveInfo = Movie_Info.objects.create(title='foo', overview='bar') myMovieGenre = Movie_Info_genre.objects.create(genre='horror') myMovieInfo.genres.add(myMoveGenre) 

Unlike modifying other fields, both models must exist in the database prior to doing this, so you must call save before adding the many-to-many relationship. Since add immediately affects the database, you do not need to save afterwards.