impuls/website/admin.py

from django.contrib import admin
from .models import Author, Category, Post, Contact, Registrant2024, Registrant2025
from django.core.mail import send_mail
from django.template.loader import render_to_string

class RegistrantAdmin(admin.ModelAdmin):
    #list_display = ('name','timestamp', 'payed', 'cake', 'rate_reduced')
    list_display = ('name','birthdate','address_town','mail')
    readonly_fields = ['timestamp']
    list_filter = ['payed', 'rate_reduced', 'canceled', 'team', 'food', 'cake']
    actions = ['welcome_mail','preparation_mail']

    @admin.action(description='Send welcome mail to ...')
    def welcome_mail(self, request, queryset):
        for reg in queryset:
            msg_plain = render_to_string('welcome_mail.txt', {"form": reg})
            msg_html = render_to_string('welcome_mail.html', {"form": reg})
            send_mail(f'Herzlich Willkommen zur Im·Puls-Tagung, {reg.name}', msg_plain, 'buero@im-puls.org', [f"{reg.mail}"], fail_silently=False, html_message=msg_html)
            send_mail(f'Neue Anmeldung: {reg.name}', msg_plain, 'buero@im-puls.org', ["webmaster@denkena-consulting.com"], fail_silently=False, html_message=msg_html)

    @admin.action(description='Send preparation mail to ...')
    def preparation_mail(self, request, queryset):
        for reg in queryset:
            msg_plain = render_to_string('preparation_mail.txt', {"form": reg})
            msg_html = render_to_string('preparation_mail.html', {"form": reg})
            send_mail(f'Letzte Informationen zur Im·Puls-Tagung, {reg.name}', msg_plain, 'buero@im-puls.org', [f"{reg.mail}"], fail_silently=False, html_message=msg_html)
    
    @admin.action(description='Send preparation mail to all')
    def preparation_mail(self):
        for reg in Registrant25.objects.all:
            msg_plain = render_to_string('preparation_mail.txt', {"form": reg})
            msg_html = render_to_string('preparation_mail.html', {"form": reg})
            send_mail(f'Letzte Informationen zur Im·Puls-Tagung, {reg.name}', msg_plain, 'buero@im-puls.org', [f"{reg.mail}"], fail_silently=False, html_message=msg_html)

admin.site.register(Author)
admin.site.register(Category)
admin.site.register(Post)
admin.site.register(Contact)
admin.site.register(Registrant2024, RegistrantAdmin)
admin.site.register(Registrant2025, RegistrantAdmin)