CODEWITHSUNDEEP
djangodjango-1.7
Chirdeep Tomar
Chirdeep Tomar

Reputation: 4461

Load static data on django startup using AppConfig ready method in Django 1.7

I have some static location data to load so that it is available throughout the application like an in-memory cache.

I tried to override ready() on AppConfig but data isn't loaded from the database, also ready() is getting called twice. 

from django.apps import AppConfig


class WebConfig(AppConfig):
    name = 'useraccount'
    verbose_name = 'User Accounts'
    locations = []

   def ready(self):
        print("Initialising...")
        location = self.get_model('Location')
        all_locations = location.objects.all()
        print(all_locations.count())
        self.locations = list(all_locations)

any hints?

Upvotes: 6

Views: 3506

Answers (2)

GrvTyagi
GrvTyagi

Reputation: 4487

For load some static data in app create a separate file for get data

# file /app_util.py
def get_country():
    if Student.objects.all().count == 0:
       ... # your code 
    else:
       ...  # your code

import app_util and call it from url.py

# file /url.py
admin.autodiscover()
urlpatterns = patterns('equity_funds_investor_app',
                       # Examples:
                       url(r'^$', 'views.index'),
                      )
# make a call to save/get method
app_util.get_country()

Note: same process you can follow when you want to save/get some data at start of ur app url.py file process only one time when u make a first request after runserver and call your custom function(s)

Upvotes: 1

Andrew Hows
Andrew Hows

Reputation: 1438

Well, the docs ( https://docs.djangoproject.com/en/1.7/ref/applications/#django.apps.AppConfig.ready ) tell you to avoid using database calls in the ready() function, and also that it may be called twice.

Avoiding the double-call is easy:

def ready(self):
    if self.has_attr('ready_run'): return
    self.ready_run = True
    ...

But I'm still trying to find the right way to do database-based initialization, too. I'll update if I find anything.

Upvotes: 1

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