search display 'Nothing found'

[IkaDeady]

When I try to find an item on the field, nothing is found.
Django shows django.core.exceptions.FieldError: Related Field got invalid lookup: icontains
and the error seem to be at the line 27 on the view,
values = model.objects.filter(**{'{}__icontains'.format(search_field): value})[:limit]
I'm working with Django 2.0.1

[and3rson]

Thanks for reporting! I'll fix the Django 2.x support.

[and3rson]

@IkaDeady Can you please provide some example code on how you define your field? I could not reproduce it locally.

[IkaDeady]

Models.py:
Class Time(models.Model):
some lines...
Class Meta:
abstract = True
Class Gateway(Time):
Serial = models.PositiveIntegerField(primary_key = True)
some lines....

Class Firmware(Time):
Serial = models.ManyToManyField(Gateway, blank = True, related_name = 'Gw_Serial')
Groups = models.ManyToManyField('Group', blank = True)
File = models.FileField(....arguments) 'I found that other peoples have similar issues with file fields'

Admin.py:
from searchableselect.widgets import SearchableSelect
other imports...

class formFix(forms.ModelForm):
class Meta:
model = Firmware
exclude = []
widgets = {
'Serial': SearchableSelect(model='fwupdate.Firmware', search_field='Serial', many=True, limit=10)
}

class FirmwareAdmin(admin.ModelAdmin):
form = formFix

admin.site.register(Firmware, FirmwareAdmin)

Tell me if you need more information.
PS: This widget can be used to multiple select like does with chosen.js?