I am attempting to filter a single field with multiple values using the django-filters package. For example, I have a model Content with field paragraph. I want to return the object if Content.paragraph contains string “McDonald” or Content.paragraph contains string “MacDonald”. Essentially be able to pass multiple icontains to a single field. I would like to be able to pass theoretically infinite values, not just two. Thanks!
In Django, if you want to filter a model based on multiple values for a single field, you can use the Q object from the django.db.models module. You can create a dynamic Q object by iterating through your list of values and combining them with the | (OR) operator. Then, you can use this Q object in your queryset.
Q
django.db.models
|
Here’s an example using the icontains filter for the paragraph field:
icontains
paragraph
from django.db.models import Q from django_filters import rest_framework as filters from .models import Content class ContentFilter(filters.FilterSet): paragraph_contains = filters.CharFilter(method='filter_paragraph_contains') class Meta: model = Content fields = ['paragraph_contains'] def filter_paragraph_contains(self, queryset, name, value): # Split the input value into a list of search terms search_terms = value.split() # Create a dynamic Q object combining icontains for each search term q_objects = Q() for term in search_terms: q_objects |= Q(paragraph__icontains=term) # Apply the filter to the queryset queryset = queryset.filter(q_objects) return queryset
In this example:
paragraph_contains
CharFilter
filter_paragraph_contains
filter(q_objects)
Now, when you use this filter in your Django view or DRF endpoint, you can pass a string with multiple search terms separated by spaces, and it will filter the queryset accordingly.
class ContentView(generics.ListAPIView): queryset = Content.objects.all() serializer_class = ContentSerializer filterset_class = ContentFilter
For example:
/api/content/?paragraph_contains=McDonald
/api/content/?paragraph_contains=McDonald MacDonald
/api/content/?paragraph_contains=McDonald%20MacDonald