class Post(models.Model):
created_date = models.DateTimeField(
default=timezone.now
)
def elasped_time(self):
now = datetime.now()
then = self.created_date
timedelta = now - then
minutes = timedelta.seconds/60
return minutes
I'm just a beginner in programming, and I made the model by referring to stackoverflow.
This is from models.py.
By the way, views.py
def post_list(request):
post_list = Post.objects.all().order_by(elasped_time)
template = loader.get_template('blog/index.html')
context = {
'post_list': post_list,
}
return HttpResponse(template.render(context, request))
Trying to run it like this
TypeError at / expected string or bytes-like object
Like this.
post_list = Post.objects.all().order_by(elasped_time)
This is the problem.
I'm a beginner, what should I do?
I'd appreciate it if you let me know.
Also, can I get the elasped_time I made above as a simple float or integrer value?
I'd like to calculate based on that value.
django
I think you'd like to do a chronological sort. You have to write down the field name that is the basis for sorting, but you wrote down the method name.
Post.objects.all().order_by('created_date')
Write it down and use it. It should be sorted in the order in which it was written.
If you want to see the latest one, you can write Post.objects.all().order_by('-created_date') and use it.
If you want to see the last 5 minutes of Post, you can do it as follows.
from datetime import datetime, timedelta
five_minute = datetime.now() - timedelta(minutes=5)
Post.objects.filter(created_date__gt=five_minute)
For more information on how to use created_date__gt, see here .
If you want to get the current time from the store, it is better to use django.utils.timezone.now() rather than datetime.datetime.now().
This is because the default DateField/DateTimeField in the warehouse has timezone information, but datetime.now() does not contain timezone information.
from django.utils import timezone
from datetime import timedelta
five_minute = timezone.now() - timedelta(minutes=5)
Post.objects.filter(created_date__gt=five_minute)
‐ AskDjango
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