179 lines
8.4 KiB
Python
179 lines
8.4 KiB
Python
from django.shortcuts import render
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import datetime
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from currencies.models import (ExchangeRate,
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ExchangeRate_date,
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ExchangeRate_name)
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from currencies import exchange_rates
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def currencies(request):
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# this function fetches the data from exchange_rates.py
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# evaluates if the values are already stored and
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# prepares the view all dynamicaly.
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# It can grow in terms of more Currencies over time automaticaly.
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# try:
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today = ''
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raw_data = ''
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raw_data, today = exchange_rates.get_exchange_rate()
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# except Exception as e:
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# print('get_exchange_rate() %s (%s) on %s'
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# % (e, type(e), today))
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message_no = "Already querried today: "
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message_yes = " Updated successfully: "
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count_raw_data = 0
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if raw_data != "SNB did not update the currencies for today.":
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for currency, rate in raw_data.items():
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count_raw_data += 1
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if ExchangeRate.objects.filter(
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date__date=today,
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name__name=currency):
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message_no += currency + ", "
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# A: https://stackoverflow.com/a/27802801/4061870
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else:
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if ExchangeRate_date.objects.filter(date=today)[:1]:
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try:
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# lustigerweise gibt .values() den value und den id
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# zurück. Ohne .values() gibts nur den "value"
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date_dict = ExchangeRate_date.objects.filter(
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date=today).values()
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date = date_dict[0]['date']
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date_id = date_dict[0]['id']
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except Exception as e:
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print('exdate_exists %s (%s) on %s'
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% (e, type(e), today))
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else:
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try:
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exdate = ExchangeRate_date.objects.create(
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date=today)
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exdate.save()
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except Exception as e:
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print('exdate_not_exists %s (%s) for %s'
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% (e, type(e), today))
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if ExchangeRate_name.objects.filter(
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name=currency)[:1]:
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try:
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name_dict = ExchangeRate_name.objects.filter(
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name=currency).values()
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name = name_dict[0]['name']
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name_id = name_dict[0]['id']
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except Exception as e:
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print('exname_exists %s (%s) on %s'
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% (e, type(e), currency))
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else:
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try:
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exname = ExchangeRate_name.objects.create(
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name=currency)
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exname.save()
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except Exception as e:
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print('exname_not_exists %s (%s) on %s'
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% (e, type(e), currency))
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try:
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exrate = ExchangeRate.objects.create(
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# name_id=name_id,
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name_id=ExchangeRate_name.objects.get(
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name=currency).id,
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# date_id=date_id,
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date_id=ExchangeRate_date.objects.get(
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date=today).id,
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exchange_rate_to_chf=rate,
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)
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exrate.save()
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message_yes += currency + ", "
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except Exception as e:
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print('exrate_create %s (%s) on %s for %s'
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% (e, type(e), currency, today))
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# prepare messages:
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message_no = message_no[::-1] # invert the string
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message_no = message_no.replace(",", "!", 1) # replace first , with !
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message_no = message_no[::-1] # invert the string back
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message_yes = message_yes[::-1] # invert the string
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message_yes = message_yes.replace(",", "!", 1) # replace f. , with !
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message_yes = message_yes[::-1] # invert the string back
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if len(message_no) > 24 and len(message_yes) > 23:
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message = message_no + message_yes
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elif len(message_no) > 24:
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message = message_no
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elif len(message_yes) > 23:
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message = message_yes
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elif datetime.datetime.today().isoweekday() == 6:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Es ist Samstag, die SNB publiziert nur an Arbeitstagen
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neue Kurse...
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"""
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elif datetime.datetime.today().isoweekday() == 7:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Es ist Sonntag, die SNB publiziert nur an Arbeitstagen
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neue Kurse...
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"""
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else:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Kann es sein dass die SNB aufgrund eines Feiertages
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geschlossen ist?
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"""
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else:
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message = "Die SNB hat die Währungsliste noch nicht aktualisiert."
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currency_list = ExchangeRate.objects.all()
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currency_USD_list = ExchangeRate.objects.filter(name__name='USD')
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currency_EUR_list = ExchangeRate.objects.filter(name__name='EUR')
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currency_JPY_list = ExchangeRate.objects.filter(name__name='JPY')
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currency_GBP_list = ExchangeRate.objects.filter(name__name='GBP')
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# -------------------------------------------------------------------
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# -------------------------------------------------------------------
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# I leave this part in the document as history.
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# Problem is that i get the expected List with dictionaries like:
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# view_currencies_list[
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# {'date': '2017-12-29, 'USD':'1.00', 'EUR':'1.00', 'GBP':'1.00', 'JPY':'1.00'},
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# {'date': '2017-12-30, 'USD':'1.00', 'EUR':'1.00', 'GBP':'1.00', 'JPY':'1.00'},
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# ]
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# but the dict of 'date:' does not seam to deliver the same values as
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# the dict's of key name:'USD' im not able to fix this in moment.
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# nor am i able to generate a HTML table with date | USD | EUR | ...
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# -------------------------------------------------------------------
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# -------------------------------------------------------------------
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# prepare data to be displayed in a html table:
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# https://stackoverflow.com/questions/8749158/removing-duplicates-from-dictionary#8749473
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# A: https://stackoverflow.com/questions/37205793/django-values-list-vs-values#37205928
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# B: https://stackoverflow.com/questions/6521892/how-to-access-a-dictionary-key-value-present-inside-a-list
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# # search for currencies in a date and apend them to the list
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# view_currency_list = []
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# view_currencies_list = ExchangeRate_name.objects.all()
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# view_dates_list = ExchangeRate_date.objects.all()
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# count_date = 0
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# count_currencies = 0
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# for view_date in view_dates_list:
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# count_date += 1
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# view_currency_dict = {view_date}
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# # view_currency_dict.update({})
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# for view_currency in view_currencies_list:
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# count_currencies += 1
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# try:
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# x = ExchangeRate.objects.filter(date__date=str(
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# view_date),
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# name__name=str(
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# view_currency
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# )).values() # A
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# view_exchange_rate_to_chf = x[0]['exchange_rate_to_chf']
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# except Exception as e:
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# print('prepare_view %s (%s) for %s on %s is %s'
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# % (e, type(e), view_currency, view_date,
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# view_exchange_rate_to_chf))
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# view_exchange_rate_to_chf = " "
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#
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# view_currency_dict.update({view_currency:
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# view_exchange_rate_to_chf}) # B
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#
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# view_currency_list.append(view_currency_dict)
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# assert False
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return render(request,
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'currencies/index.html',
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{'currency_list': currency_list,
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'currency_USD_list': currency_USD_list,
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'currency_EUR_list': currency_EUR_list,
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'currency_JPY_list': currency_JPY_list,
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'currency_GBP_list': currency_GBP_list,
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'count_raw_data': count_raw_data,
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'message': message})
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