class ..SettingsAdminInline(TabularInline):
    def has_add_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return False

    def _text(self, obj):
        return obj.text[:100] + '...'

    model = ...Settings
    formset =...SettingsInlineFormset
    extra = 0

    ordering = ('-is_enabled',)
    fields = ('name', '_text', 'is_enabled')

    readonly_fields = ('name', '_text')