Update model attribute without refreshing database - ajax

Question

I'm building a website listing poker tournaments. I would like to allow user mark some tournaments as his favourite and avoid forms or extra page with GET parameter - I would like to to update it without refreshing website. From what I understand, it's done by ajax and jquery. But there are many ajax libraries and I would like you to tell me, which one should I use and how to do this simple functionality best.
This is my tournament table:
I would like to have another column before event time, that would contain image for heart. It would be black (not favourite) and if user clicks on it, it would turn red (favourite).
I think m2m relationship should be used here. This is my tournament model.
class Tournament(models.Model):
favourite = models.ManyToManyField(User)
date = models.DateTimeField('Event time')
currency = models.CharField(max_length=5, choices=CURRENCIES, default='USD')
name = models.CharField("Tournament name", max_length=200)
prize = models.DecimalField(max_digits=20, decimal_places=2)
entry = models.DecimalField(max_digits=20, decimal_places=2)
fee = models.DecimalField(max_digits=20, decimal_places=2)
password = models.CharField("password", max_length=200)
type = models.ForeignKey('room.Type')
room = models.ForeignKey('room.Room')
requirements_difficulty = models.IntegerField('Tournament Difficulty',
validators=[MinValueValidator(1), MaxValueValidator(30)])
requirements_text = models.CharField("Requirements Description", max_length=1000)
recurrence = models.CharField(max_length=5,
choices=RECURRENCE_CHOICES,
default='NONE')
So how do I add m2m relationship between user and tournament? Do I use ajax code or dajax? How do I create this m2m without refreshing page?

Answer 1

So how do I add m2m relationship between user and tournament?
Assuming that you use the default django user model:
Class Tournament(models.Model):
user = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='user_tournament')
...
Do I use ajax code or dajax?
As #doniyor said, you should define your real problem and split your question. SO is not "do it for me", anyway, what I can do for you, is give you some good links ;)
W3 schools definition for ajax:
http://www.w3schools.com/ajax/ajax_intro.asp
Good ajax plugin for djando that seems you already know:
http://www.dajaxproject.com/
By the way, you should use dajax, is easy and faster to create ajax pages integrated with django (you just have to follow the tutorials, is pretty simple).
How do I create this m2m without refreshing page?
Using dajax