app/django/contrib/admin/helpers.py
author Sverre Rabbelier <srabbelier@gmail.com>
Sun, 15 Mar 2009 16:30:26 +0000
changeset 1875 69d60793092a
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
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from django import forms
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from django.conf import settings
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from django.utils.html import escape
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from django.utils.safestring import mark_safe
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from django.utils.encoding import force_unicode
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from django.contrib.admin.util import flatten_fieldsets
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from django.contrib.contenttypes.models import ContentType
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class AdminForm(object):
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    def __init__(self, form, fieldsets, prepopulated_fields):
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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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    def __iter__(self):
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        for name, options in self.fieldsets:
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            yield Fieldset(self.form, name, **options)
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    def first_field(self):
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        try:
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            fieldset_name, fieldset_options = self.fieldsets[0]
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            field_name = fieldset_options['fields'][0]
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            if not isinstance(field_name, basestring):
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                field_name = field_name[0]
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            return self.form[field_name]
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        except (KeyError, IndexError):
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            pass
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        try:
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            return iter(self.form).next()
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        except StopIteration:
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            return None
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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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    media = property(_media)
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class Fieldset(object):
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    def __init__(self, form, name=None, fields=(), classes=(), description=None):
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        self.form = form
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        self.name, self.fields = name, fields
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        self.classes = u' '.join(classes)
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        self.description = description
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    def _media(self):
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        if 'collapse' in self.classes:
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            return forms.Media(js=['%sjs/admin/CollapsedFieldsets.js' % settings.ADMIN_MEDIA_PREFIX])
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        return forms.Media()
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    media = property(_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)
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class Fieldline(object):
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    def __init__(self, form, field):
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        self.form = form # A django.forms.Form instance
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        if isinstance(field, basestring):
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            self.fields = [field]
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        else:
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            self.fields = field
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    def __iter__(self):
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        for i, field in enumerate(self.fields):
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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(u'\n'.join([self.form[f].errors.as_ul() for f in self.fields]).strip('\n'))
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class AdminField(object):
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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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    def label_tag(self):
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        classes = []
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        if self.is_checkbox:
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            classes.append(u'vCheckboxLabel')
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            contents = force_unicode(escape(self.field.label))
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        else:
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            contents = force_unicode(escape(self.field.label)) + u':'
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        if self.field.field.required:
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            classes.append(u'required')
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        if not self.is_first:
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            classes.append(u'inline')
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        attrs = classes and {'class': u' '.join(classes)} or {}
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        return self.field.label_tag(contents=contents, attrs=attrs)
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class InlineAdminFormSet(object):
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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):
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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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    def __iter__(self):
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        for form, original in zip(self.formset.initial_forms, self.formset.get_queryset()):
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            yield InlineAdminForm(self.formset, form, self.fieldsets, self.opts.prepopulated_fields, original)
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        for form in self.formset.extra_forms:
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            yield InlineAdminForm(self.formset, form, self.fieldsets, self.opts.prepopulated_fields, None)
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    def fields(self):
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        for field_name in flatten_fieldsets(self.fieldsets):
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            yield self.formset.form.base_fields[field_name]
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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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    media = property(_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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        self.formset = formset
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        self.original = original
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        if original is not None:
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            self.original.content_type_id = ContentType.objects.get_for_model(original).pk
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        self.show_url = original and hasattr(original, 'get_absolute_url')
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        super(InlineAdminForm, self).__init__(form, fieldsets, prepopulated_fields)
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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 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 AdminErrorList(forms.util.ErrorList):
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    """
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    Stores all errors for the form/formsets in an add/change stage view.
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    """
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    def __init__(self, form, inline_formsets):
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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())