How to make search_fields case-insensitive for the Russian language in the Django admin panel?

Question

Django

I add a search field in the admin panel. The documentation says that the search is case-insensitive. If you search in English, then it is. But in Russian, for some reason, it is not like that. Why might this be?

class HtmlPartAdmin(admin.ModelAdmin):
    list_display = ('title', 'get_text', 'slug', )
    list_display_links = ('title', )
    search_fields = ('title', 'text')
    prepopulated_fields = {'slug': ('title',)}

admin.site.register(HtmlPart, HtmlPartAdmin)

Answer 1

SQLite is not friendly with the Russian language and search. Use postgres.