Display images in Django

I have a django app which allows users to submit an image with it. Right now my model looks like

class Posting(models.Model):
    title = models.CharField(max_length=150)
    images = models.ForeignKey(Image, null=True)

class Image(models.Model):
    img = models.ImageField(upload_to="photos/",null=True, blank=True)

and I am trying to display the images in my template however I cannot seem to get it to work. I have gone though countless stack overflow posts and haven't had any luck. In my template I have

{ for post in postings }
    <img src"{{ post.image.url }} #and many variations of this

however other seems to display the url. The url seems to always be blank. Any help would be greatly appreciated!