CODEWITHSUNDEEP
djangoloopstemplatesview
mar24n
mar24n

Reputation: 133

django how to loop in view and print in template

i have serial numbers in my database , each serial number have coded date in it, i want to get the date from the serial number and print in data table

my view.py

from .models import Module

month = {'1': 'Jan', '2': 'Feb', '3': 'Mar', '4': 'Apr', '5': 'May', '6': 'Jun', '7': 'Jul', '8': 'Aug', '9': 'Sep', '10': 'Oct', '11': 'Nov', '12': 'Dec'}
year = {'L': '2010', 'M': '2011', 'N': '2012', 'O': '2013', 'P': '2014', 'Q': '2015'}


@login_required()
def modules(request):

    modules = Module.objects.all()
    for module in modules:
        day = module.serial_number[:2]
        mon = module.serial_number[2:3]
        mon = [val for key, val in month.items() if mon in key]
        year1 = module.serial_number[3:4]
        year1 = [val for key, val in year.items() if year1 in key]
        print(module.serial_number, day, mon, year1)

    total_modules = modules.count()

    context = {'modules': modules, 'total_modules': total_modules,
               }
    return render(request, 'modules/modules.html', context)

when print(module.serial_number, day, mon, year1) im getting what i want

044PGG01501S 04 ['Apr'] ['2014']
127QGG01501S 12 ['Jul'] ['2015']

but cant make this work in template

any ideas

Upvotes: 0

Views: 100

Answers (1)

Andrzej Długosz
Andrzej Długosz

Reputation: 336

I would strongly advice not to use such loops in case of simple properties, using 'annotate' function of django or writing properties of a model such as: day, mon, year1 is both viable options - better than using forloop in view.

Annotation: https://docs.djangoproject.com/en/3.1/topics/db/aggregation/ Writing properies: https://docs.djangoproject.com/en/3.1/topics/db/models/#model-methods

Forloop in django template: https://docs.djangoproject.com/en/3.1/ref/templates/builtins/#for

So basicaly in template you should be able to use

{% for module in modules %}
{{module.serial_number}} {{module.day}} {{module.mon}} {{module.year1}}

The problem that you have is that you are not creating properties of an object in forloop (if you insist on using this approach) but you make general variables, you should use module.day instead of day, and so on.

Upvotes: 1

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