Question

Here is my models.py

class Picture(models.Model):
    image = models.ImageField(upload_to='uploads/')
    caption = models.CharField(max_length=140, null=True, blank=True)
    uploaded = models.DateField()
    comments = models.ManyToManyField(Comment, null=True, blank=True)

And my tastypie’s API resources, api.py:

class PictureResource(ModelResource):

    class Meta:
        queryset = Picture.objects.all.order_by('-uploaded')
        resource_name = "photo"
        authorization = Authorization()
        API_LIMIT_PER_PAGE = 24

As you see, I want my API page in order by latest image uploaded.

My error code is:

Function object has no attribute ‘order_by’

As usually I don’t know what to do…

(By the way, API_LIMIT_PER_PAGE = 24 is this in the right place?)

Answer 1

Change your queryset to:

class PictureResource(ModelResource):

    class Meta:
        queryset = Picture.objects.all().order_by('-uploaded')
        resource_name = "photo"
        authorization = Authorization()
        API_LIMIT_PER_PAGE = 24

all by itself it’s just a method, but if you use it like all() it returns a QuerySet. order_by is a QuerySet method.

>> type(Picture.objects.all)
<type 'instancemethod'>

>> type(Picture.objects.all())
<class 'django.db.models.query.QuerySet'>