search using django filter - django

Question

I am trying to perform search on name and email field.
For email field its giving an error "invalid literal for int() with base 10: 'abc#xyz.com'". but when I am using the user.id its giving correct result.
For name field, its giving Cannot resolve keyword 'first_name' into field.
How do i get it to work. Any help will be highly appreciated.
my two models are:
class publication(models.Model):
title = models.CharField(max_length=500)
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
....
class MyUser(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(_('email address'), max_length=254,
unique=True)
first_name = models.CharField(_('first name'), max_length=30,
blank=True)
last_name = models.CharField(_('last name'), max_length=30,
blank=True)
.....
My view:
def search(request):
result = publication.objects.all()
query = request.GET.get("query")
if query:
result = result.filter(
Q(title__icontains=query) |
Q(user__first_name__icontains=query) |
Q(user__email=query)
).distinct()
user_filter = UserFilter(request.GET, queryset=result)
return render(request, "search.html", {'filter': user_filter})
My filter:
class UserFilter(filters.FilterSet):
title = filters.CharFilter(lookup_expr='icontains')
first_name = filters.CharFilter(lookup_expr='iexact')
user = filters.CharFilter(lookup_expr='exact')
class Meta:
model = publication
fields = ['title', 'first_name', 'user']
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/core/handlers/exception.py", line 41, in inner
response = get_response(request)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/views/generic/base.py", line 88, in dispatch
return handler(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django_filters/views.py", line 66, in get
self.object_list = self.filterset.qs
File "/usr/local/lib/python2.7/dist-packages/django_filters/filterset.py", line 214, in qs
qs = filter_.filter(qs, value)
File "/usr/local/lib/python2.7/dist-packages/django_filters/filters.py", line 171, in filter
qs = self.get_method(qs)(**{'%s__%s' % (self.name, lookup): value})
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/query.py", line 781, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/query.py", line 799, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/sql/query.py", line 1260, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/sql/query.py", line 1286, in _add_q
allow_joins=allow_joins, split_subq=split_subq,
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/sql/query.py", line 1216, in build_filter
condition = lookup_class(lhs, value)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/lookups.py", line 24, in __init__
self.rhs = self.get_prep_lookup()
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/fields/related_lookups.py", line 110, in get_prep_lookup
self.rhs = target_field.get_prep_value(self.rhs)
File "/usr/local/lib/python2.7/dist-packages/Django-1.11-py2.7.egg/django/db/models/fields/__init__.py", line 962, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'abc#xyz.com'

Answer 1

If you need to filter by relation model's field you can use name argument of filed class:
class UserFilter(filters.FilterSet):
title = filters.CharFilter(lookup_expr='icontains')
first_name = filters.CharFilter(name='user__first_name', lookup_expr='iexact')
user = filters.CharFilter(name='user__email', lookup_expr='exact')
See details here.
UPD
To filter full name try to implement custom method:
full_name = CharFilter(method='my_custom_filter')
def my_custom_filter(self, queryset, name, value):
first_name, last_name = value.split()
return queryset.filter(Q(user__first_name__icontains=first_name) | Q(user__last_name__icontains=last_name))

Answer 2

I use on my views.py for case search query on table blognews, for this code use for form post method search with name input keyword:
def list_content(request):
shelf = content.objects.all()
if(request.method=="POST"):
keyword=request.POST.get('keyword')
shelf=blogsnews.objects.filter(judul__icontains=keyword)
return render(request,'homepage/list_news.html',{'shelf':shelf})
for function filter "icontains or contains please visit docs django manual