app/django/contrib/admin/util.py
author Daniel Hans <Daniel.M.Hans@gmail.com>
Sat, 14 Nov 2009 23:27:03 +0100
changeset 3091 a48f4e860f7b
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Tasks may be deleted by pressing 'Delete' button on the edit view. An organization admin may delete a task entity, if the task is not claimed by anyone. Issue 695 fixed.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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from django.core.exceptions import ObjectDoesNotExist
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from django.db import models
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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.text import capfirst
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from django.utils.encoding import force_unicode
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from django.utils.translation import ugettext as _
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def quote(s):
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    """
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    Ensure that primary key values do not confuse the admin URLs by escaping
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    any '/', '_' and ':' characters. Similar to urllib.quote, except that the
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    quoting is slightly different so that it doesn't get automatically
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    unquoted by the Web browser.
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    """
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    if not isinstance(s, basestring):
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        return s
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    res = list(s)
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    for i in range(len(res)):
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        c = res[i]
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        if c in """:/_#?;@&=+$,"<>%\\""":
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            res[i] = '_%02X' % ord(c)
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    return ''.join(res)
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def unquote(s):
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    """
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    Undo the effects of quote(). Based heavily on urllib.unquote().
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    """
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    mychr = chr
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    myatoi = int
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    list = s.split('_')
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    res = [list[0]]
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    myappend = res.append
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    del list[0]
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    for item in list:
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        if item[1:2]:
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            try:
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                myappend(mychr(myatoi(item[:2], 16)) + item[2:])
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            except ValueError:
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                myappend('_' + item)
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        else:
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            myappend('_' + item)
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    return "".join(res)
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def flatten_fieldsets(fieldsets):
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    """Returns a list of field names from an admin fieldsets structure."""
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    field_names = []
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    for name, opts in fieldsets:
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        for field in opts['fields']:
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            # type checking feels dirty, but it seems like the best way here
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            if type(field) == tuple:
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                field_names.extend(field)
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            else:
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                field_names.append(field)
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    return field_names
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def _nest_help(obj, depth, val):
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    current = obj
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    for i in range(depth):
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        current = current[-1]
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    current.append(val)
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def get_deleted_objects(deleted_objects, perms_needed, user, obj, opts, current_depth, admin_site):
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    "Helper function that recursively populates deleted_objects."
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    nh = _nest_help # Bind to local variable for performance
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    if current_depth > 16:
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        return # Avoid recursing too deep.
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    opts_seen = []
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    for related in opts.get_all_related_objects():
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        has_admin = related.model in admin_site._registry
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        if related.opts in opts_seen:
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            continue
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        opts_seen.append(related.opts)
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        rel_opts_name = related.get_accessor_name()
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        if isinstance(related.field.rel, models.OneToOneRel):
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            try:
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                sub_obj = getattr(obj, rel_opts_name)
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            except ObjectDoesNotExist:
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                pass
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            else:
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                if has_admin:
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                    p = '%s.%s' % (related.opts.app_label, related.opts.get_delete_permission())
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                    if not user.has_perm(p):
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                        perms_needed.add(related.opts.verbose_name)
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                        # We don't care about populating deleted_objects now.
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                        continue
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                if not has_admin:
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                    # Don't display link to edit, because it either has no
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                    # admin or is edited inline.
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                    nh(deleted_objects, current_depth, [u'%s: %s' % (force_unicode(capfirst(related.opts.verbose_name)), sub_obj), []])
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                else:
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                    # Display a link to the admin page.
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                    nh(deleted_objects, current_depth, [mark_safe(u'%s: <a href="../../../../%s/%s/%s/">%s</a>' %
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                        (escape(force_unicode(capfirst(related.opts.verbose_name))),
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                            related.opts.app_label,
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                            related.opts.object_name.lower(),
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                            sub_obj._get_pk_val(), sub_obj)), []])
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                get_deleted_objects(deleted_objects, perms_needed, user, sub_obj, related.opts, current_depth+2, admin_site)
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        else:
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            has_related_objs = False
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            for sub_obj in getattr(obj, rel_opts_name).all():
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                has_related_objs = True
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                if not has_admin:
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                    # Don't display link to edit, because it either has no
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                    # admin or is edited inline.
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                    nh(deleted_objects, current_depth, [u'%s: %s' % (force_unicode(capfirst(related.opts.verbose_name)), sub_obj), []])
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                else:
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                    # Display a link to the admin page.
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                    nh(deleted_objects, current_depth, [mark_safe(u'%s: <a href="../../../../%s/%s/%s/">%s</a>' % \
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                        (escape(force_unicode(capfirst(related.opts.verbose_name))), related.opts.app_label, related.opts.object_name.lower(), sub_obj._get_pk_val(), escape(sub_obj))), []])
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                get_deleted_objects(deleted_objects, perms_needed, user, sub_obj, related.opts, current_depth+2, admin_site)
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            # If there were related objects, and the user doesn't have
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            # permission to delete them, add the missing perm to perms_needed.
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            if has_admin and has_related_objs:
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                p = '%s.%s' % (related.opts.app_label, related.opts.get_delete_permission())
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                if not user.has_perm(p):
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                    perms_needed.add(related.opts.verbose_name)
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    for related in opts.get_all_related_many_to_many_objects():
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        has_admin = related.model in admin_site._registry
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        if related.opts in opts_seen:
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            continue
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        opts_seen.append(related.opts)
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        rel_opts_name = related.get_accessor_name()
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        has_related_objs = False
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        # related.get_accessor_name() could return None for symmetrical relationships
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        if rel_opts_name:
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            rel_objs = getattr(obj, rel_opts_name, None)
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            if rel_objs:
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                has_related_objs = True
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        if has_related_objs:
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            for sub_obj in rel_objs.all():
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                if not has_admin:
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                    # Don't display link to edit, because it either has no
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                    # admin or is edited inline.
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                    nh(deleted_objects, current_depth, [_('One or more %(fieldname)s in %(name)s: %(obj)s') % \
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                        {'fieldname': force_unicode(related.field.verbose_name), 'name': force_unicode(related.opts.verbose_name), 'obj': escape(sub_obj)}, []])
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                else:
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                    # Display a link to the admin page.
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                    nh(deleted_objects, current_depth, [
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                        mark_safe((_('One or more %(fieldname)s in %(name)s:') % {'fieldname': escape(force_unicode(related.field.verbose_name)), 'name': escape(force_unicode(related.opts.verbose_name))}) + \
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                        (u' <a href="../../../../%s/%s/%s/">%s</a>' % \
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                            (related.opts.app_label, related.opts.module_name, sub_obj._get_pk_val(), escape(sub_obj)))), []])
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        # If there were related objects, and the user doesn't have
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        # permission to change them, add the missing perm to perms_needed.
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        if has_admin and has_related_objs:
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            p = u'%s.%s' % (related.opts.app_label, related.opts.get_change_permission())
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            if not user.has_perm(p):
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                perms_needed.add(related.opts.verbose_name)