app/django/contrib/comments/models.py
author Todd Larsen <tlarsen@google.com>
Thu, 20 Nov 2008 19:43:31 +0000
changeset 513 3c1e16637ad7
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Rename partial_path to scope_path, ignoring case, etc. (Similar to the recent link_name => link_id change). Also, fix two missed "Linkname" column headers in some templates. Patch by: Todd Larsen
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import datetime
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from django.contrib.auth.models import User
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from django.contrib.comments.managers import CommentManager
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from django.contrib.contenttypes import generic
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from django.contrib.contenttypes.models import ContentType
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from django.contrib.sites.models import Site
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from django.db import models
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from django.core import urlresolvers
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from django.utils.translation import ugettext_lazy as _
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from django.conf import settings
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COMMENT_MAX_LENGTH = getattr(settings,'COMMENT_MAX_LENGTH',3000)
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class BaseCommentAbstractModel(models.Model):
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    """
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    An abstract base class that any custom comment models probably should
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    subclass.
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    """
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    # Content-object field
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    content_type   = models.ForeignKey(ContentType,
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            related_name="content_type_set_for_%(class)s")
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    object_pk      = models.TextField(_('object ID'))
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    content_object = generic.GenericForeignKey(ct_field="content_type", fk_field="object_pk")
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    # Metadata about the comment
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    site        = models.ForeignKey(Site)
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    class Meta:
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        abstract = True
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    def get_content_object_url(self):
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        """
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        Get a URL suitable for redirecting to the content object.
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        """
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        return urlresolvers.reverse(
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            "comments-url-redirect",
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            args=(self.content_type_id, self.object_pk)
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        )
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class Comment(BaseCommentAbstractModel):
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    """
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    A user comment about some object.
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    """
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    # Who posted this comment? If ``user`` is set then it was an authenticated
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    # user; otherwise at least user_name should have been set and the comment
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    # was posted by a non-authenticated user.
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    user        = models.ForeignKey(User, blank=True, null=True, related_name="%(class)s_comments")
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    user_name   = models.CharField(_("user's name"), max_length=50, blank=True)
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    user_email  = models.EmailField(_("user's email address"), blank=True)
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    user_url    = models.URLField(_("user's URL"), blank=True)
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    comment = models.TextField(_('comment'), max_length=COMMENT_MAX_LENGTH)
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    # Metadata about the comment
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    submit_date = models.DateTimeField(_('date/time submitted'), default=None)
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    ip_address  = models.IPAddressField(_('IP address'), blank=True, null=True)
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    is_public   = models.BooleanField(_('is public'), default=True,
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                    help_text=_('Uncheck this box to make the comment effectively ' \
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                                'disappear from the site.'))
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    is_removed  = models.BooleanField(_('is removed'), default=False,
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                    help_text=_('Check this box if the comment is inappropriate. ' \
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                                'A "This comment has been removed" message will ' \
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                                'be displayed instead.'))
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    # Manager
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    objects = CommentManager()
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    class Meta:
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        db_table = "django_comments"
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        ordering = ('submit_date',)
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        permissions = [("can_moderate", "Can moderate comments")]
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    def __unicode__(self):
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        return "%s: %s..." % (self.name, self.comment[:50])
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    def save(self, force_insert=False, force_update=False):
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        if self.submit_date is None:
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            self.submit_date = datetime.datetime.now()
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        super(Comment, self).save(force_insert, force_update)
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    def _get_userinfo(self):
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        """
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        Get a dictionary that pulls together information about the poster
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        safely for both authenticated and non-authenticated comments.
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        This dict will have ``name``, ``email``, and ``url`` fields.
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        """
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        if not hasattr(self, "_userinfo"):
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            self._userinfo = {
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                "name"  : self.user_name,
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                "email" : self.user_email,
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                "url"   : self.user_url
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            }
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            if self.user_id:
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                u = self.user
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                if u.email:
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                    self._userinfo["email"] = u.email
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                # If the user has a full name, use that for the user name.
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                # However, a given user_name overrides the raw user.username,
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                # so only use that if this comment has no associated name.
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                if u.get_full_name():
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                    self._userinfo["name"] = self.user.get_full_name()
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                elif not self.user_name:
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                    self._userinfo["name"] = u.username
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        return self._userinfo
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    userinfo = property(_get_userinfo, doc=_get_userinfo.__doc__)
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    def _get_name(self):
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        return self.userinfo["name"]
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    def _set_name(self, val):
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        if self.user_id:
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            raise AttributeError(_("This comment was posted by an authenticated "\
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                                   "user and thus the name is read-only."))
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        self.user_name = val
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    name = property(_get_name, _set_name, doc="The name of the user who posted this comment")
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    def _get_email(self):
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        return self.userinfo["email"]
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    def _set_email(self, val):
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        if self.user_id:
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            raise AttributeError(_("This comment was posted by an authenticated "\
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                                   "user and thus the email is read-only."))
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        self.user_email = val
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    email = property(_get_email, _set_email, doc="The email of the user who posted this comment")
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    def _get_url(self):
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        return self.userinfo["url"]
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    def _set_url(self, val):
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        self.user_url = val
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    url = property(_get_url, _set_url, doc="The URL given by the user who posted this comment")
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    def get_absolute_url(self, anchor_pattern="#c%(id)s"):
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        return self.get_content_object_url() + (anchor_pattern % self.__dict__)
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    def get_as_text(self):
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        """
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        Return this comment as plain text.  Useful for emails.
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        """
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        d = {
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            'user': self.user,
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            'date': self.submit_date,
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            'comment': self.comment,
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            'domain': self.site.domain,
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            'url': self.get_absolute_url()
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        }
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        return _('Posted by %(user)s at %(date)s\n\n%(comment)s\n\nhttp://%(domain)s%(url)s') % d
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class CommentFlag(models.Model):
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    """
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    Records a flag on a comment. This is intentionally flexible; right now, a
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    flag could be:
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        * A "removal suggestion" -- where a user suggests a comment for (potential) removal.
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        * A "moderator deletion" -- used when a moderator deletes a comment.
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    You can (ab)use this model to add other flags, if needed. However, by
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    design users are only allowed to flag a comment with a given flag once;
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    if you want rating look elsewhere.
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    """
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    user      = models.ForeignKey(User, related_name="comment_flags")
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    comment   = models.ForeignKey(Comment, related_name="flags")
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    flag      = models.CharField(max_length=30, db_index=True)
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    flag_date = models.DateTimeField(default=None)
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    # Constants for flag types
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    SUGGEST_REMOVAL = "removal suggestion"
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    MODERATOR_DELETION = "moderator deletion"
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    MODERATOR_APPROVAL = "moderator approval"
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    class Meta:
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        db_table = 'django_comment_flags'
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        unique_together = [('user', 'comment', 'flag')]
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    def __unicode__(self):
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        return "%s flag of comment ID %s by %s" % \
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            (self.flag, self.comment_id, self.user.username)
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    def save(self, force_insert=False, force_update=False):
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        if self.flag_date is None:
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            self.flag_date = datetime.datetime.now()
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        super(CommentFlag, self).save(force_insert, force_update)