Django form with ManyToMany field with 500,000 objects times out

Question

Lets say for example I have a Model called \"Client\" and a model called \"PhoneNumbers\"

class PhoneNumbers(models.Model):
    number = forms.IntegerField()

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Answer 1

Since Django 2.0, Django Admin ships with an autocomplete_fields attribute that generates autocomplete widgets for foreign keys and many-to-many fields.

class PhoneNumbersAdmin(admin.ModelAdmin):
    search_fields = ['number']

class ClientAdmin(admin.ModelAdmin):
    autocomplete_fields = ['number']

Note that this only works in the scope of Django admin of course. To get autocomplete fields outside the admin you would need an extra package such as django-autocomplete-light as already suggested in other answers.