# -*- coding: utf-8 -*-
from django.contrib import admin


class ReadonlyAdmin(admin.ModelAdmin):
    """
    Example admin class which makes all fields readonly
    """
    def __init__(self, model, admin_site):
        super(ReadonlyAdmin, self).__init__(model, admin_site)
        self.readonly_fields = [
            field.name
            for field in filter(lambda f: not f.auto_created, model._meta.fields)
        ]

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

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

    def changeform_view(self, request, object_id=None, form_url="", extra_context=None):
        extra_context = extra_context or {}
        extra_context["show_save_and_continue"] = False
        extra_context["show_save"] = False
        return super(ReadonlyAdmin, self).changeform_view(
            request, object_id, extra_context=extra_context
        )