filters.py 2.02 KB
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from datetime import datetime


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from rest_framework.filters import BaseFilterBackend
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from django.db.models import Q
from django.conf import settings

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from .models import Mandate

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class ActiveMandateQueryFilterBackend(BaseFilterBackend):
    """
    A filter which check if a mandate is active for a reprensentative

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    the parameter used in the query to filter is, by default active_mandates
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    and it list a list of mandates among which one should be active.
    """
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    query_param = getattr(settings, 'ACTIVE_MANDATES_PARAM', 'active_mandates')
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    def filter_queryset(self, request, queryset, view):
        qs = queryset

        if self.query_param in request.GET:
            if len(request.GET[self.query_param]):
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                # We want to check for params in a list of mandates
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                mandates = request.GET[self.query_param].split(',')
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                qs = qs.filter(mandates__in=Mandate.objects.filter(
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                    Q(end_date__gte=datetime.today) |
                    Q(end_date__isnull=True)).filter(
                        Q(group__name__in=mandates) |
                        Q(group__abbreviation__in=mandates)
                )).distinct()
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        return qs

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class ActiveConstituencyFilterBackend(BaseFilterBackend):
    """
    A filter which check if a representative is active in a constituency

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    the parameter used in the query to filter is, by default,
    active_constituency.
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    """
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    query_param = getattr(settings,
            'ACTIVE_CONSTITUENCY_PARAM', 'active_constituency')
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    def filter_queryset(self, request, queryset, view):
        qs = queryset

        if self.query_param in request.GET:
            if len(request.GET[self.query_params]):
                mandates = request.GET[self.query_param].split(',')
                qs = qs.filter(mandates__in=Mandate.objects.filter(
                    Q(end_date__gte=datetime.today) |
                    Q(end_date__isnull=True)).filter(
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                        Q(constituency__name__in=mandates)
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                )).distinct()
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        return qs