Django-cms-saq的测试版本为2.4.x.我正在尝试更新程序以使用3.0.X。
到目前为止，我已经更新了所有导入，但遇到了一个不寻常的错误。当我向页面添加问题（插件）并点击发布时，它会在数据库中创建问题的两个副本（可通过管理站点查看）。删除任一副本都会从已发布的页面中删除这两个副本，但会将问题保留为编辑模式。
如何解决这个问题呢？
我会在这里包含一些文件。如果您需要任何其他文件，请告诉我。
请注意，我正在尝试添加多项选择题。
来自models.py：
from django.db import models
from django.db.models import Max, Sum
from cms.models import CMSPlugin, Page, Placeholder
from cms.models.fields import PageField
from taggit.managers import TaggableManager
from djangocms_text_ckeditor.models import AbstractText
...
class Question(CMSPlugin):
QUESTION_TYPES = [
('S', 'Single-choice question'),
('M', 'Multi-choice question'),
('F', 'Free-text question'),
]
slug = models.SlugField(
help_text="A slug for identifying answers to this specific question "
"(allows multiple only for multiple languages)")
tags = TaggableManager(blank=True)
label = models.CharField(max_length=512, blank=True)
help_text = models.CharField(max_length=512, blank=True)
question_type = models.CharField(max_length=1, choices=QUESTION_TYPES)
optional = models.BooleanField(
default=False,
help_text="Only applies to free text questions",
)
depends_on_answer = models.ForeignKey(
Answer, null=True, blank=True, related_name='trigger_questions')
def copy_relations(self, oldinstance):
for answer in oldinstance.answers.all():
answer.pk = None
answer.question = self
answer.save()
self.depends_on_answer = oldinstance.depends_on_answer
@staticmethod
def all_in_tree(page):
root = page.get_root()
# Remember that there might be questions on the root page as well!
tree = root.get_descendants() | Page.objects.filter(id=root.id)
placeholders = Placeholder.objects.filter(page__in=tree)
return Question.objects.filter(placeholder__in=placeholders)
@staticmethod
def all_in_page(page):
placeholders = Placeholder.objects.filter(page=page)
return Question.objects.filter(placeholder__in=placeholders)
def score(self, answers):
if self.question_type == 'F':
return 0
elif self.question_type == 'S':
return self.answers.get(slug=answers).score
elif self.question_type == 'M':
answers_list = answers.split(',')
return sum([self.answers.get(slug=a).score for a in answers_list])
@property
def max_score(self):
if not hasattr(self, '_max_score'):
if self.question_type == "S":
self._max_score = self.answers.aggregate(
Max('score'))['score__max']
elif self.question_type == "M":
self._max_score = self.answers.aggregate(
Sum('score'))['score__sum']
else:
self._max_score = None # don't score free-text answers
return self._max_score
def percent_score_for_user(self, user):
if self.max_score:
try:
score = Submission.objects.get(
question=self.slug,
user=user,
).score
except Submission.DoesNotExist:
return 0
return 100.0 * score / self.max_score
else:
return None
def __unicode__(self):
return self.slug
...
来自cms_plugins.py
import itertools
import operator
from django.contrib import admin
from django.utils.translation import ugettext as _
from cms.plugin_base import CMSPluginBase
from cms.plugin_pool import plugin_pool
from cms_saq.models import Question, Answer, GroupedAnswer, Submission, \
FormNav, ProgressBar, SectionedScoring, ScoreSection, BulkAnswer, \
QuestionnaireText, SubmissionSetReview
from djangocms_text_ckeditor.cms_plugins import TextPlugin
from djangocms_text_ckeditor.models import Text
from bs4 import BeautifulSoup
...
class QuestionPlugin(CMSPluginBase):
model = Question
module = "SAQ"
inlines = [AnswerAdmin]
exclude = ('question_type',)
def render(self, context, instance, placeholder):
user = context['request'].user
submission_set = None
triggered = True
depends_on = None
if instance.depends_on_answer:
depends_on = instance.depends_on_answer.pk
try:
Submission.objects.get(
user=user,
question=instance.depends_on_answer.question.slug,
answer=instance.depends_on_answer.slug,
submission_set=submission_set,
)
triggered = True
except:
triggered = False
extra = {
'question': instance,
'answers': instance.answers.all(),
'triggered': triggered,
'depends_on': depends_on,
}
if user.is_authenticated():
try:
extra['submission'] = Submission.objects.get(
user=user,
question=instance.slug,
submission_set=submission_set,
)
except Submission.DoesNotExist:
pass
context.update(extra)
return context
def save_model(self, request, obj, form, change):
obj.question_type = self.question_type
super(QuestionPlugin, self).save_model(request, obj, form, change)
...
class MultiChoiceQuestionPlugin(QuestionPlugin):
name = "Multi Choice Question"
render_template = "cms_saq/multi_choice_question.html"
question_type = "M"
exclude = ('question_type', 'help_text')
...
plugin_pool.register_plugin(SingleChoiceQuestionPlugin)
plugin_pool.register_plugin(MultiChoiceQuestionPlugin)
plugin_pool.register_plugin(DropDownQuestionPlugin)
plugin_pool.register_plugin(GroupedDropDownQuestionPlugin)
plugin_pool.register_plugin(FreeTextQuestionPlugin)
plugin_pool.register_plugin(FreeNumberQuestionPlugin)
plugin_pool.register_plugin(FormNavPlugin)
plugin_pool.register_plugin(SubmissionSetReviewPlugin)
plugin_pool.register_plugin(SectionedScoringPlugin)
plugin_pool.register_plugin(ProgressBarPlugin)
plugin_pool.register_plugin(BulkAnswerPlugin)
plugin_pool.register_plugin(SessionDefinition)
plugin_pool.register_plugin(QuestionnaireTextPlugin)
plugin_pool.register_plugin(TranslatedTextPlugin)
来自cms_app.py：
from cms.app_base import CMSApp
from cms.apphook_pool import apphook_pool
from django.utils.translation import ugettext_lazy as _
class CMSSaq(CMSApp):
name = _("Self Assessment")
urls = ["cms_saq.urls"]
apphook_pool.register(CMSSaq)
其他信息：
这种重复观察在尝试通过slug Question.objects.get(slug=question_slug)获取问题对象时会产生问题。这样的查询应该只返回一个问题。我们得到的是两个问题。
import re
from django.http import HttpResponse, HttpResponseBadRequest
from django.contrib.auth.decorators import login_required
from django.views.decorators.http import require_POST, require_GET
from django.views.decorators.cache import never_cache
from django.utils import simplejson, datastructures
from django.conf import settings
from cms_saq.models import Question, Answer, Submission, SubmissionSet
ANSWER_RE = re.compile(r'^[\w-]+(,[\w-]+)*$')
@require_POST
def _submit(request):
post_data = datastructures.MultiValueDict(request.POST)
submission_set_tag = post_data.pop('submission_set_tag', '')
for question_slug, answers in post_data.iteritems():
# validate the question
try:
question = Question.objects.get(
slug=question_slug,
#placeholder__page__publisher_is_draft=False,
)
except Question.DoesNotExist:
return HttpResponseBadRequest(
"Invalid question '%s'" % question_slug,
)
# check answers is a list of slugs
if question.question_type != 'F' and not ANSWER_RE.match(answers):
return HttpResponseBadRequest("Invalid answers: %s" % answers)
# validate and score the answer
try:
score = question.score(answers)
except Answer.DoesNotExist:
return HttpResponseBadRequest(
"Invalid answer '%s:%s'" % (question_slug, answers)
)
# save, but don't update submissions belonging to an existing set
filter_attrs = {
'user': request.user.id,
'question': question_slug,
'submission_set': None,
}
attrs = {'answer': answers, 'score': score}
rows = Submission.objects.filter(**filter_attrs).update(**attrs)
if not rows:
attrs.update(filter_attrs)
Submission.objects.create(**attrs)
# Create submission set if requested
if submission_set_tag:
submission_set_tag = submission_set_tag[0]
if submission_set_tag:
_create_submission_set(
request, submission_set_tag
)
return HttpResponse("OK")
答案 0 :(得分：2)
如果您在CMS中创建一个页面并向其添加插件，则一旦您点击发布，CMS就会在该时间点创建每个插件的副本。这为页面提供了实时版本，然后您可以对其进行更改，这些更改将保留在草稿模式中，直到您再次点击发布。
这使您可以拥有网站的草稿版本，在此版本中可以进行编辑/更改并最终确定。
因此，查看每个插件的两个副本不是问题。
作为旁注，如果您正在开发CMS网站，我强烈建议您加入Google Plus上的CMS用户组; https://plus.google.com/communities/107689498573071376044
<强>更新
好的，因此CMS中的插件附加到页面上的占位符，而且它是具有两个版本的页面。因为每个插件都附加到页面，所以您可以使用该关系来过滤插件。
如果您使用admin注册您的插件，或者对其进行对象调用，您只需查看表中存储的内容，正如我所说，其中包含插件的草稿和实时版本。
因此，当您查询插件时，请执行此操作;
questions = Question.objects.filter(placeholder__page__publisher_is_draft=True)
这将为您提供草稿页面附带的所有问题。
唯一的缺点是插件保证附加到Page()对象，除非插件设置为page_only = True但我只对附加到页面的插件感兴趣所以它适合我。有关详细信息，请参阅docs。
此外，如果您要将CMS页面链接添加到任何插件中，请不要忘记在模型字段中添加类似的参数，以确保将页面对象限制为仅草稿;
page_link = models.ForeignKey(
Page,
limit_choices_to={'publisher_is_draft': True},
help_text=_("Link to another page on the site."),
on_delete=models.SET_NULL,
related_name='myapp_page_link'
)