Django common code in views

I have been reading around for other answers but i am still not understanding what is the quickest and best way to using common开发者_运维问答 code for multiple views.

Let's say i have this code, that reflects a user's points, that i want displayed in many of the views.

if(request.user.is_authenticated()):
    # UserLove
    userLove = 0
    ul = Love.objects.filter(user=request.user.id)
    for u in ul:
        userLove += u.amount
else:
    userLove= 0

I saw words about using decorators. I heard about generic views and subclassed views, and someone also mentioned context processors

Can you tell me which is best, and how would my code look if I had View1 and View2 as examples. Thanx!

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Not sure I agree that either Decorators or Template Tags are the best approach here. Decorators are applied to the function (i.e. view), so for instance if you wanted to make sure that a user was logged in before they accessed a view, you could use a Decorator. But not for determining values inside the function.

If you have a block of code that you want to re-use in several places, just make it a separate function, maybe in a utilities file, then import the function. For instance:

# myapps.utilities.py
from models import Love
def computeLove(request):
    # code for determining value here
    return LoveValue

# someView.py
from myapps.utilities import computeLove

def showRatings(request):
    lv = computeLove(request)

It's a standard programming method, you don't really need any specific Django features for this.

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Okay, probably you need something else, but in your case you can do this thing using template tag, for example:

in appname/util.py you have to write the part of code which will return data you need. then in template tag you do something like

# appname_tags.py
from django import template
from appname.util import get_rating

register = template.Library()

@register.simple_tag
def user_rating(user):
    rating = get_rating(user)
    return rating if rating is not None else ''

so in your template file:

{% load appname_tags %}

{% user_rating anyuser %}

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For this, writing either a Template Context Processor or a Template Tag is the best approach.