基于Django contrib Comments 评论模块(详解)

{% load comments %}

{% get_comment_count for entry as comment_count %}

{% get_comment_count for blog.entry 14 as comment_count %}

{% render_comment_list for [object] %}

{% get_comment_list for [object] as [varname] %}

{% get_comment_list for event as comment_list %}
{% for comment in comment_list %}
...
{% endfor %}

{% get_comment_permalink comment_obj [format_string] %}

{% get_comment_permalink comment "#c%(id)s-by-%(user_name)s"%}

{% for comment in comment_list %}
  <a name="c{{ comment.id }}"></a>
  <a href="{% get_comment_permalink comment %}">
    permalink for comment #{{ forloop.counter }}
  </a>
  ...
{% endfor %}

{% get_comment_count for [object] as [varname] %}

{% get_comment_count for entry as comment_count %}

This entry has {{ comment_count }} comments.

{% render_comment_form for [object] %}

{% get_comment_form for [object] as [varname] %}

{% get_comment_form for event as form %}
<table>
 <form action="{% comment_form_target %}" method="post">
  {% csrf_token %}
  {{ form }}
  <tr>
   <td colspan="2">
    <input type="submit" name="submit" value="Post">
    <input type="submit" name="preview" value="Preview">
   </td>
  </tr>
 </form>
</table>

<form action="{% comment_form_target %}" method="post">

<input type="hidden" name="next" value="{% url 'my_comment_was_posted' %}" />

{% if user.is_authenticated %}
  {% get_comment_form for object as form %}
  <form action="{% comment_form_target %}" method="POST">
  {% csrf_token %}
  {{ form.comment }}
  {{ form.honeypot }}
  {{ form.content_type }}
  {{ form.object_pk }}
  {{ form.timestamp }}
  {{ form.security_hash }}
  <input type="hidden" name="next" value="{% url 'object_detail_view' object.id %}" />
  <input type="submit" value="提交评论" id="id_submit" />
  </form>
{% else %}
  <p>请先<a href="{% url 'auth_login' %}">登录</a>后方可评论.</p>
{% endif %}

#id_honeypot {
  display: none;
}

from __future__ import unicode_literals

from django.conf import settings
from django.contrib.contenttypes.fields import GenericForeignKey
from django.contrib.contenttypes.models import ContentType
from django.contrib.sites.models import Site
from django.db import models
from django.utils import timezone
from django.utils.encoding import python_2_unicode_compatible
from django.utils.translation import ugettext_lazy as _
try:
  from django.urls import reverse
except ImportError:
  from django.core.urlresolvers import reverse # Django < 1.10

from .managers import CommentManager

COMMENT_MAX_LENGTH = getattr(settings, 'COMMENT_MAX_LENGTH', 3000)


class BaseCommentAbstractModel(models.Model):
  """
  An abstract base class that any custom comment models probably should
  subclass.
  """

  # Content-object field
  content_type = models.ForeignKey(ContentType,
                   verbose_name=_('content type'),
                   related_name="content_type_set_for_%(class)s",
                   on_delete=models.CASCADE)
  object_pk = models.TextField(_('object ID'))
  content_object = GenericForeignKey(ct_field="content_type", fk_field="object_pk")

  # Metadata about the comment
  site = models.ForeignKey(Site, on_delete=models.CASCADE)

  class Meta:
    abstract = True

  def get_content_object_url(self):
    """
    Get a URL suitable for redirecting to the content object.
    """
    return reverse(
      "comments-url-redirect",
      args=(self.content_type_id, self.object_pk)
    )


@python_2_unicode_compatible
class CommentAbstractModel(BaseCommentAbstractModel):
  """
  A user comment about some object.
  """

  # Who posted this comment? If ``user`` is set then it was an authenticated
  # user; otherwise at least user_name should have been set and the comment
  # was posted by a non-authenticated user.
  user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_('user'),
               blank=True, null=True, related_name="%(class)s_comments",
               on_delete=models.SET_NULL)
  user_name = models.CharField(_("user's name"), max_length=50, blank=True)
  # Explicit `max_length` to apply both to Django 1.7 and 1.8+.
  user_email = models.EmailField(_("user's email address"), max_length=254,
                  blank=True)
  user_url = models.URLField(_("user's URL"), blank=True)

  comment = models.TextField(_('comment'), max_length=COMMENT_MAX_LENGTH)

  # Metadata about the comment
  submit_date = models.DateTimeField(_('date/time submitted'), default=None, db_index=True)
  ip_address = models.GenericIPAddressField(_('IP address'), unpack_ipv4=True, blank=True, null=True)
  is_public = models.BooleanField(_('is public'), default=True,
                  help_text=_('Uncheck this box to make the comment effectively '
                        'disappear from the site.'))
  is_removed = models.BooleanField(_('is removed'), default=False,
                   help_text=_('Check this box if the comment is inappropriate. '
                         'A "This comment has been removed" message will '
                         'be displayed instead.'))

  # Manager
  objects = CommentManager()

  class Meta:
    abstract = True
    ordering = ('submit_date',)
    permissions = [("can_moderate", "Can moderate comments")]
    verbose_name = _('comment')
    verbose_name_plural = _('comments')

  def __str__(self):
    return "%s: %s..." % (self.name, self.comment[:50])

  def save(self, *args, **kwargs):
    if self.submit_date is None:
      self.submit_date = timezone.now()
    super(CommentAbstractModel, self).save(*args, **kwargs)

# 后面省略

INSTALLED_APPS = [
  ...
  'my_comment_app',
  ...
]
COMMENTS_APP = 'my_comment_app'

my_comment_app/
  __init__.py
  models.py
  forms.py

from django.db import models
from django_comments.abstracts import CommentAbstractModel

class CommentWithTitle(CommentAbstractModel):
  title = models.CharField(max_length=300)

from django import forms
from django_comments.forms import CommentForm
from my_comment_app.models import CommentWithTitle

class CommentFormWithTitle(CommentForm):
  title = forms.CharField(max_length=300)

  def get_comment_create_data(self):
    # 使用父类的数据的同时增加title字段
    data = super(CommentFormWithTitle, self).get_comment_create_data()
    data['title'] = self.cleaned_data['title']
    return data

def get_model():
  from my_comment_app.models import CommentWithTitle
  return CommentWithTitle

def get_form():
  from my_comment_app.forms import CommentFormWithTitle
  return CommentFormWithTitle