144 lines
5.1 KiB
Python
144 lines
5.1 KiB
Python
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from django.contrib.admin.exceptions import DisallowedModelAdminToField
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from django.contrib.admin.utils import flatten_fieldsets, unquote
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from django.core.exceptions import PermissionDenied
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from django.template.response import TemplateResponse
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from django.contrib.admin.options import TO_FIELD_VAR
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from django.utils.translation import gettext as _
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class AdminConfirmMixin(object):
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"""Generic AdminConfirm Mixin"""
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confirm_change = None
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confirmation_fields = None
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# Custom templates (designed to be over-ridden in subclasses)
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change_confirmation_template = None
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def get_confirmation_fields(self, request, obj=None):
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"""
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Hook for specifying confirmation fields
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"""
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if self.confirmation_fields:
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return self.confirmation_fields
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return flatten_fieldsets(self.get_fieldsets(request, obj))
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def render_change_confirmation(self, request, context):
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opts = self.model._meta
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app_label = opts.app_label
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request.current_app = self.admin_site.name
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context.update(
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media=self.media,
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)
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return TemplateResponse(
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request,
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self.change_confirmation_template
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or [
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"admin/{}/{}/change_confirmation.html".format(
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app_label, opts.model_name
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),
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"admin/{}/change_confirmation.html".format(app_label),
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"admin/change_confirmation.html",
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],
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context,
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)
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def change_view(self, request, object_id=None, form_url="", extra_context=None):
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if request.method == "POST" and request.POST.get("_confirm_change"):
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return self._change_confirmation_view(
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request, object_id, form_url, extra_context
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)
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extra_context = {
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**(extra_context or {}),
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'confirm_change': self.confirm_change
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}
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return super().change_view(request, object_id, form_url, extra_context)
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def _change_confirmation_view(self, request, object_id, form_url, extra_context):
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# This code is taken from __changeform_view
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to_field = request.POST.get(
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TO_FIELD_VAR, request.GET.get(TO_FIELD_VAR)
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)
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if to_field and not self.to_field_allowed(request, to_field):
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raise DisallowedModelAdminToField(
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"The field %s cannot be referenced." % to_field
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)
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model = self.model
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opts = model._meta
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add = object_id is None
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obj = self.get_object(request, unquote(object_id), to_field)
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if obj is None:
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return self._get_obj_does_not_exist_redirect(request, opts, object_id)
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if not self.has_view_or_change_permission(request, obj):
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raise PermissionDenied
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fieldsets = self.get_fieldsets(request, obj)
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ModelForm = self.get_form(
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request, obj, change=not add, fields=flatten_fieldsets(fieldsets)
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)
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form = ModelForm(request.POST, request.FILES, obj)
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form_validated = form.is_valid()
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if form_validated:
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new_object = self.save_form(request, form, change=not add)
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else:
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new_object = form.instance
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# Parse the changed data - Note that using form.changed_data would not work as initial is not set
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changed_data = {}
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for name, field in form.fields.items():
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initial_value = obj.__getattribute__(name)
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new_value = new_object.__getattribute__(name)
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if field.has_changed(initial_value, new_value):
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changed_data[name] = [initial_value, new_value]
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if not bool(set(self.get_confirmation_fields(request, obj)) & set(changed_data.keys())):
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# No confirmation required for changed fields, continue to save
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return super().change_view(request, object_id, form_url, extra_context)
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# Parse the original save action from request
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save_action = None
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for action in ["_save", "_saveasnew", "_addanother", "_continue"]:
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if action in request.POST:
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save_action = action
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break
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# Parse raw form data from POST
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form_data = {}
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for key in request.POST:
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if key.startswith("_") or key == 'csrfmiddlewaretoken':
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continue
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form_data[key] = request.POST.get(key)
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if add:
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title_action = _('adding')
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else:
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title_action = _('changing')
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context = {
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**self.admin_site.each_context(request),
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"preserved_filters": self.get_preserved_filters(request),
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"title": f"{_('Confirm')} {title_action} {opts.verbose_name}",
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"subtitle": str(obj),
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"object_name": str(obj),
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"object_id": object_id,
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"app_label": opts.app_label,
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"model_name": opts.model_name,
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"opts": opts,
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"form_data": form_data,
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"changed_data": changed_data,
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"submit_name": save_action,
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**(extra_context or {}),
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}
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return self.render_change_confirmation(request, context)
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