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Django, execute templatetag before displaying the template

I have a Django app that is part of an online store. In the application, POST is processed in templatetag called posthandler.py, like this

{% load posthandler %}
{% posthandler %}

In index.html, which is always loading. After that, the file has a main bit like this

{% block primary %}{% endblock %}

Now this primary bit displays a value, a margin that could be adjusted into a posthandler bit. Value, value may be out of date. This leads to the fact that a person clicks on an item, adding it to his list of orders, but a page that needs two updates, before the stock value, correctly reflects the value in the database.

I think this is due to the processing order of templatetags, something like this:

  • User clicks button to add to order list
  • The page reloads through the view, first displaying the stock value in index.html based on what is currently in the database
  • Posthandler.py works by subtracting it from the stock, so the database is now updated.
  • The page with the wrong number is displayed, since this value was extracted from the database before it was configured.

I would have thought of processing the message in the view, but I want the same post-sender to work on all different pages, so this doesn't seem to be the way to go. Is there a better way to do this? Or can I make the main block execute only after templatetags?

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2 answers

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