CODEWITHSUNDEEP
pythondjangodjango-models
Modelesq
Modelesq

Reputation: 5402

Creating a get_absolute_url()

I'm getting an 404 error when trying to post. But the error is event objects don't have get_absolute_url() methods

class Event(models.Model):
    title = models.CharField(max_length=200)
    description = models.TextField()
    date = models.DateTimeField()
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)
    avatar = models.ImageField(upload_to='avatars/events/', null=True, blank=True)
    tags = models.ManyToManyField(Tag, null=True, blank=True)

    class Meta:
        ordering = ['-date']

    def __unicode__(self):
        return self.title

    # I made this, but this doesn't work
    def get_absolute_url(self):
        return "/event/" + self.id

    # it returns : 
            Exception Type:  TypeError
            Exception Value: cannot concatenate 'str' and 'int' objects

How do I properly make this work? Thanks for you help in advance.

Upvotes: 0

Views: 682

Answers (3)

garmoncheg
garmoncheg

Reputation: 906

self.id is a number and you're trying to convert it to number in url... you can still do "+" operation if you convert it's type to desired string... so you must do:

def get_absolute_url(self):
    return "/event/" + str(self.id)

and it will work. This way you can do Unicode conversions and so on... By specifying exact type you want an output to be. However other constructions seem to be quicker. But I prefer this one because of visual clarity in what's going on in this piece of code...

Upvotes: 0

Rico
Rico

Reputation: 6052

The return value from get_absolute_url is trying to combine a string and number.

def get_absolute_url(self):
    return "/event/{0}".format(self.id)

Upvotes: 0

jfocht
jfocht

Reputation: 1754

You need to use a format string.

def get_absolute_url(self):
    return "/event/%d" % self.id

Upvotes: 3

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