django-orchestra-test/orchestra/admin/decorators.py

103 lines
4.3 KiB
Python

from functools import wraps, partial, update_wrapper
from django.contrib import messages
from django.contrib.admin import helpers
from django.core.exceptions import ValidationError
from django.template.response import TemplateResponse
from django.utils.decorators import available_attrs
from django.utils.encoding import force_text
from django.utils.html import format_html
from django.utils.text import capfirst
from django.utils.translation import ugettext_lazy as _
def admin_field(method):
""" Wraps a function to be used as a ModelAdmin method field """
def admin_field_wrapper(*args, **kwargs):
""" utility function for creating admin links """
kwargs['field'] = args[0] if args else '__str__'
kwargs['order'] = kwargs.get('order', kwargs['field'])
kwargs['popup'] = kwargs.get('popup', False)
# TODO get field verbose name
kwargs['short_description'] = kwargs.get('short_description',
kwargs['field'].split('__')[-1].replace('_', ' ').capitalize())
admin_method = partial(method, **kwargs)
admin_method = update_wrapper(admin_method, method)
admin_method.short_description = kwargs['short_description']
admin_method.allow_tags = True
admin_method.admin_order_field = kwargs['order']
return admin_method
return admin_field_wrapper
def format_display_objects(modeladmin, request, queryset):
from .utils import change_url
opts = modeladmin.model._meta
objects = []
for obj in queryset:
objects.append(format_html('{0}: <a href="{1}">{2}</a>',
capfirst(opts.verbose_name), change_url(obj), obj)
)
return objects
def action_with_confirmation(action_name=None, extra_context=None, validator=None,
template='admin/orchestra/generic_confirmation.html'):
"""
Generic pattern for actions that needs confirmation step
If custom template is provided the form must contain:
<input type="hidden" name="post" value="generic_confirmation" />
"""
def decorator(func, extra_context=extra_context, template=template, action_name=action_name, validatior=validator):
@wraps(func, assigned=available_attrs(func))
def inner(modeladmin, request, queryset, action_name=action_name, extra_context=extra_context, validator=validator):
if validator is not None:
try:
validator(queryset)
except ValidationError as e:
messages.error(request, '<br>'.join(e))
return
# The user has already confirmed the action.
if request.POST.get('post') == 'generic_confirmation':
stay = func(modeladmin, request, queryset)
if not stay:
return
opts = modeladmin.model._meta
app_label = opts.app_label
action_value = func.__name__
if len(queryset) == 1:
objects_name = force_text(opts.verbose_name)
obj = queryset.get()
else:
objects_name = force_text(opts.verbose_name_plural)
obj = None
if not action_name:
action_name = func.__name__
context = {
'title': _("Are you sure?"),
'content_message': _("Are you sure you want to {action} the selected {item}?").format(
action=action_name, item=objects_name),
'action_name': action_name.capitalize(),
'action_value': action_value,
'queryset': queryset,
'opts': opts,
'obj': obj,
'app_label': app_label,
'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
}
if callable(extra_context):
extra_context = extra_context(modeladmin, request, queryset)
context.update(extra_context or {})
if 'display_objects' not in context:
# Compute it only when necessary
context['display_objects'] = format_display_objects(modeladmin, request, queryset)
# Display the confirmation page
return TemplateResponse(request, template, context)
return inner
return decorator