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Ambulance Clerc
445
venv/Lib/site-packages/django/contrib/admin/helpers.py
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445
venv/Lib/site-packages/django/contrib/admin/helpers.py
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import json
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from django import forms
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from django.contrib.admin.utils import (
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display_for_field, flatten_fieldsets, help_text_for_field, label_for_field,
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lookup_field, quote,
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)
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from django.core.exceptions import ObjectDoesNotExist
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from django.db.models.fields.related import (
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ForeignObjectRel, ManyToManyRel, OneToOneField,
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)
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from django.forms.utils import flatatt
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from django.template.defaultfilters import capfirst, linebreaksbr
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from django.urls import NoReverseMatch, reverse
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from django.utils.html import conditional_escape, format_html
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from django.utils.safestring import mark_safe
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from django.utils.translation import gettext, gettext_lazy as _
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ACTION_CHECKBOX_NAME = '_selected_action'
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class ActionForm(forms.Form):
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action = forms.ChoiceField(label=_('Action:'))
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select_across = forms.BooleanField(
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label='',
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required=False,
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initial=0,
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widget=forms.HiddenInput({'class': 'select-across'}),
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)
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checkbox = forms.CheckboxInput({'class': 'action-select'}, lambda value: False)
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class AdminForm:
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def __init__(self, form, fieldsets, prepopulated_fields, readonly_fields=None, model_admin=None):
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self.form, self.fieldsets = form, fieldsets
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self.prepopulated_fields = [{
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'field': form[field_name],
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'dependencies': [form[f] for f in dependencies]
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} for field_name, dependencies in prepopulated_fields.items()]
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self.model_admin = model_admin
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if readonly_fields is None:
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readonly_fields = ()
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self.readonly_fields = readonly_fields
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def __repr__(self):
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return (
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f'<{self.__class__.__qualname__}: '
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f'form={self.form.__class__.__qualname__} '
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f'fieldsets={self.fieldsets!r}>'
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)
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def __iter__(self):
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for name, options in self.fieldsets:
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yield Fieldset(
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self.form, name,
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readonly_fields=self.readonly_fields,
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model_admin=self.model_admin,
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**options
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)
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@property
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def errors(self):
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return self.form.errors
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@property
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def non_field_errors(self):
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return self.form.non_field_errors
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@property
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def media(self):
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media = self.form.media
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for fs in self:
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media = media + fs.media
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return media
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class Fieldset:
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def __init__(self, form, name=None, readonly_fields=(), fields=(), classes=(),
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description=None, model_admin=None):
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self.form = form
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self.name, self.fields = name, fields
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self.classes = ' '.join(classes)
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self.description = description
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self.model_admin = model_admin
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self.readonly_fields = readonly_fields
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@property
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def media(self):
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if 'collapse' in self.classes:
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return forms.Media(js=['admin/js/collapse.js'])
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return forms.Media()
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def __iter__(self):
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for field in self.fields:
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yield Fieldline(self.form, field, self.readonly_fields, model_admin=self.model_admin)
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class Fieldline:
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def __init__(self, form, field, readonly_fields=None, model_admin=None):
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self.form = form # A django.forms.Form instance
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if not hasattr(field, "__iter__") or isinstance(field, str):
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self.fields = [field]
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else:
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self.fields = field
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self.has_visible_field = not all(
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field in self.form.fields and self.form.fields[field].widget.is_hidden
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for field in self.fields
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)
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self.model_admin = model_admin
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if readonly_fields is None:
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readonly_fields = ()
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self.readonly_fields = readonly_fields
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def __iter__(self):
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for i, field in enumerate(self.fields):
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if field in self.readonly_fields:
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yield AdminReadonlyField(self.form, field, is_first=(i == 0), model_admin=self.model_admin)
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else:
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yield AdminField(self.form, field, is_first=(i == 0))
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def errors(self):
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return mark_safe(
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'\n'.join(
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self.form[f].errors.as_ul() for f in self.fields if f not in self.readonly_fields
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).strip('\n')
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)
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class AdminField:
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def __init__(self, form, field, is_first):
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self.field = form[field] # A django.forms.BoundField instance
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self.is_first = is_first # Whether this field is first on the line
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self.is_checkbox = isinstance(self.field.field.widget, forms.CheckboxInput)
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self.is_readonly = False
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def label_tag(self):
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classes = []
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contents = conditional_escape(self.field.label)
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if self.is_checkbox:
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classes.append('vCheckboxLabel')
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if self.field.field.required:
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classes.append('required')
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if not self.is_first:
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classes.append('inline')
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attrs = {'class': ' '.join(classes)} if classes else {}
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# checkboxes should not have a label suffix as the checkbox appears
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# to the left of the label.
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return self.field.label_tag(
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contents=mark_safe(contents), attrs=attrs,
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label_suffix='' if self.is_checkbox else None,
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)
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def errors(self):
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return mark_safe(self.field.errors.as_ul())
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class AdminReadonlyField:
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def __init__(self, form, field, is_first, model_admin=None):
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# Make self.field look a little bit like a field. This means that
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# {{ field.name }} must be a useful class name to identify the field.
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# For convenience, store other field-related data here too.
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if callable(field):
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class_name = field.__name__ if field.__name__ != '<lambda>' else ''
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else:
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class_name = field
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if form._meta.labels and class_name in form._meta.labels:
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label = form._meta.labels[class_name]
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else:
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label = label_for_field(field, form._meta.model, model_admin, form=form)
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if form._meta.help_texts and class_name in form._meta.help_texts:
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help_text = form._meta.help_texts[class_name]
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else:
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help_text = help_text_for_field(class_name, form._meta.model)
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if field in form.fields:
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is_hidden = form.fields[field].widget.is_hidden
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else:
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is_hidden = False
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self.field = {
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'name': class_name,
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'label': label,
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'help_text': help_text,
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'field': field,
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'is_hidden': is_hidden,
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}
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self.form = form
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self.model_admin = model_admin
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self.is_first = is_first
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self.is_checkbox = False
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self.is_readonly = True
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self.empty_value_display = model_admin.get_empty_value_display()
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def label_tag(self):
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attrs = {}
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if not self.is_first:
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attrs["class"] = "inline"
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label = self.field['label']
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return format_html('<label{}>{}{}</label>', flatatt(attrs), capfirst(label), self.form.label_suffix)
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def get_admin_url(self, remote_field, remote_obj):
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url_name = 'admin:%s_%s_change' % (
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remote_field.model._meta.app_label,
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remote_field.model._meta.model_name,
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)
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try:
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url = reverse(
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url_name,
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args=[quote(remote_obj.pk)],
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current_app=self.model_admin.admin_site.name,
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)
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return format_html('<a href="{}">{}</a>', url, remote_obj)
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except NoReverseMatch:
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return str(remote_obj)
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def contents(self):
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from django.contrib.admin.templatetags.admin_list import _boolean_icon
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field, obj, model_admin = self.field['field'], self.form.instance, self.model_admin
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try:
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f, attr, value = lookup_field(field, obj, model_admin)
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except (AttributeError, ValueError, ObjectDoesNotExist):
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result_repr = self.empty_value_display
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else:
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if field in self.form.fields:
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widget = self.form[field].field.widget
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# This isn't elegant but suffices for contrib.auth's
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# ReadOnlyPasswordHashWidget.
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if getattr(widget, 'read_only', False):
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return widget.render(field, value)
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if f is None:
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if getattr(attr, 'boolean', False):
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result_repr = _boolean_icon(value)
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else:
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if hasattr(value, "__html__"):
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result_repr = value
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else:
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result_repr = linebreaksbr(value)
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else:
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if isinstance(f.remote_field, ManyToManyRel) and value is not None:
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result_repr = ", ".join(map(str, value.all()))
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elif (
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isinstance(f.remote_field, (ForeignObjectRel, OneToOneField)) and
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value is not None
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):
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result_repr = self.get_admin_url(f.remote_field, value)
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else:
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result_repr = display_for_field(value, f, self.empty_value_display)
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result_repr = linebreaksbr(result_repr)
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return conditional_escape(result_repr)
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class InlineAdminFormSet:
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"""
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A wrapper around an inline formset for use in the admin system.
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"""
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def __init__(self, inline, formset, fieldsets, prepopulated_fields=None,
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readonly_fields=None, model_admin=None, has_add_permission=True,
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has_change_permission=True, has_delete_permission=True,
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has_view_permission=True):
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self.opts = inline
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self.formset = formset
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self.fieldsets = fieldsets
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self.model_admin = model_admin
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if readonly_fields is None:
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readonly_fields = ()
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self.readonly_fields = readonly_fields
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if prepopulated_fields is None:
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prepopulated_fields = {}
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self.prepopulated_fields = prepopulated_fields
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self.classes = ' '.join(inline.classes) if inline.classes else ''
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self.has_add_permission = has_add_permission
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self.has_change_permission = has_change_permission
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self.has_delete_permission = has_delete_permission
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self.has_view_permission = has_view_permission
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def __iter__(self):
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if self.has_change_permission:
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readonly_fields_for_editing = self.readonly_fields
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else:
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readonly_fields_for_editing = self.readonly_fields + flatten_fieldsets(self.fieldsets)
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for form, original in zip(self.formset.initial_forms, self.formset.get_queryset()):
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view_on_site_url = self.opts.get_view_on_site_url(original)
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yield InlineAdminForm(
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self.formset, form, self.fieldsets, self.prepopulated_fields,
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original, readonly_fields_for_editing, model_admin=self.opts,
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view_on_site_url=view_on_site_url,
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)
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for form in self.formset.extra_forms:
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yield InlineAdminForm(
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self.formset, form, self.fieldsets, self.prepopulated_fields,
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None, self.readonly_fields, model_admin=self.opts,
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)
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if self.has_add_permission:
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yield InlineAdminForm(
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self.formset, self.formset.empty_form,
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self.fieldsets, self.prepopulated_fields, None,
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self.readonly_fields, model_admin=self.opts,
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)
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def fields(self):
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fk = getattr(self.formset, "fk", None)
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empty_form = self.formset.empty_form
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meta_labels = empty_form._meta.labels or {}
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meta_help_texts = empty_form._meta.help_texts or {}
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for i, field_name in enumerate(flatten_fieldsets(self.fieldsets)):
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if fk and fk.name == field_name:
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continue
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if not self.has_change_permission or field_name in self.readonly_fields:
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form_field = empty_form.fields.get(field_name)
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widget_is_hidden = False
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if form_field is not None:
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widget_is_hidden = form_field.widget.is_hidden
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yield {
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'name': field_name,
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'label': meta_labels.get(field_name) or label_for_field(
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field_name,
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self.opts.model,
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self.opts,
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form=empty_form,
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),
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'widget': {'is_hidden': widget_is_hidden},
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'required': False,
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'help_text': meta_help_texts.get(field_name) or help_text_for_field(field_name, self.opts.model),
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}
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else:
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form_field = empty_form.fields[field_name]
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label = form_field.label
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if label is None:
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label = label_for_field(field_name, self.opts.model, self.opts, form=empty_form)
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yield {
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'name': field_name,
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'label': label,
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'widget': form_field.widget,
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'required': form_field.required,
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'help_text': form_field.help_text,
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}
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def inline_formset_data(self):
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verbose_name = self.opts.verbose_name
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return json.dumps({
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'name': '#%s' % self.formset.prefix,
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'options': {
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'prefix': self.formset.prefix,
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'addText': gettext('Add another %(verbose_name)s') % {
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'verbose_name': capfirst(verbose_name),
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},
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'deleteText': gettext('Remove'),
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}
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})
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@property
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def forms(self):
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return self.formset.forms
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@property
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def non_form_errors(self):
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return self.formset.non_form_errors
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@property
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def media(self):
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media = self.opts.media + self.formset.media
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for fs in self:
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media = media + fs.media
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return media
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class InlineAdminForm(AdminForm):
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"""
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A wrapper around an inline form for use in the admin system.
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"""
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def __init__(self, formset, form, fieldsets, prepopulated_fields, original,
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readonly_fields=None, model_admin=None, view_on_site_url=None):
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self.formset = formset
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self.model_admin = model_admin
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self.original = original
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self.show_url = original and view_on_site_url is not None
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self.absolute_url = view_on_site_url
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super().__init__(form, fieldsets, prepopulated_fields, readonly_fields, model_admin)
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def __iter__(self):
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for name, options in self.fieldsets:
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yield InlineFieldset(
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self.formset, self.form, name, self.readonly_fields,
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model_admin=self.model_admin, **options
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)
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def needs_explicit_pk_field(self):
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return (
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# Auto fields are editable, so check for auto or non-editable pk.
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self.form._meta.model._meta.auto_field or not self.form._meta.model._meta.pk.editable or
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# Also search any parents for an auto field. (The pk info is
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# propagated to child models so that does not need to be checked
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# in parents.)
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any(parent._meta.auto_field or not parent._meta.model._meta.pk.editable
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for parent in self.form._meta.model._meta.get_parent_list())
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)
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def pk_field(self):
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return AdminField(self.form, self.formset._pk_field.name, False)
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def fk_field(self):
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fk = getattr(self.formset, "fk", None)
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if fk:
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return AdminField(self.form, fk.name, False)
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else:
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return ""
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def deletion_field(self):
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from django.forms.formsets import DELETION_FIELD_NAME
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return AdminField(self.form, DELETION_FIELD_NAME, False)
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def ordering_field(self):
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from django.forms.formsets import ORDERING_FIELD_NAME
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return AdminField(self.form, ORDERING_FIELD_NAME, False)
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class InlineFieldset(Fieldset):
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def __init__(self, formset, *args, **kwargs):
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self.formset = formset
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super().__init__(*args, **kwargs)
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def __iter__(self):
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fk = getattr(self.formset, "fk", None)
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for field in self.fields:
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if not fk or fk.name != field:
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yield Fieldline(self.form, field, self.readonly_fields, model_admin=self.model_admin)
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class AdminErrorList(forms.utils.ErrorList):
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"""Store errors for the form/formsets in an add/change view."""
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def __init__(self, form, inline_formsets):
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super().__init__()
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if form.is_bound:
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self.extend(form.errors.values())
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for inline_formset in inline_formsets:
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self.extend(inline_formset.non_form_errors())
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for errors_in_inline_form in inline_formset.errors:
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self.extend(errors_in_inline_form.values())
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