【发布时间】：2019-05-21 07:04:00
【问题描述】：
首先我使用的是 Python 3.7.3 和 Django 2.2
我遇到了在同一视图中处理多个表单集的问题。在我看来，我在 for 循环中创建我的表单集（请在下面查看），然后将它们添加到列表中。在我的模板中，我对该列表执行 for 循环并在模板中显示表单集。我认为我所做的工作很好，但是当表单集无效时会发生错误（因为我也做了一些验证）。当一个表单集无效时（因为不接受值），其他表单集也会使用这些值初始化。为什么？
models.py
class Set(models.Model):
timeSet = models.DecimalField(max_digits=5, decimal_places=2, blank=True, null=True)
scoreTeam1 = models.IntegerField(null=True)
scoreTeam2 = models.IntegerField(null=True)
match = models.ForeignKey(Match, default=None, on_delete=models.CASCADE)
class Match(models.Model):
isFinished = models.BooleanField(default=False)
team1Win = models.BooleanField(default=False)
team2Win = models.BooleanField(default=False)
phase = models.ForeignKey(Phase, default=None, on_delete=models.CASCADE)
teams = models.ManyToManyField(Team, default=None, blank=True)
tournament_manage_phase_matches.html
{% for match in matches %}
{% if match.teams.first.pool == pool %}
<div class="col-lg-12">
{% if match.isFinished == False %}
<div class="btn-group dropright">
<button type="button" class="btn btn-secondary">
Field number : {{ pool.field.numField }} | {{ match.teams.first.name }} VS {{ match.teams.last.name }}
</button>
<button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<span class="sr-only">Toggle Dropright</span>
</button>
<div class="dropdown-menu">
{% for formset_set in list_formset_set %}
{% if formset_set.match == match %}
<form class="px-4 py-3" method="post">
{% csrf_token %}
{{ formset_set|crispy }}
{{ formset_set.management_form }}
<button type="submit" class="btn btn-primary" value="{{ match.pk }}" name="match_pk">Save score</button>
</form>
{% endif %}
{% endfor %}
</div>
</div>
{% else %}
{% if match.team1Win == False and match.team2Win == False %}
<label>{{ match.teams.first.name }} VS {{ match.teams.last.name }} : Match nul</label>
{% else %}
{% if match.team1Win == True and match.team2Win == False %}
<label>{{ match.teams.first.name }} VS {{ match.teams.last.name }} : Victory {{ match.teams.first.name }}</label>
{% endif %}
{% if match.team1Win == False and match.team2Win == True %}
<label>{{ match.teams.first.name }} VS {{ match.teams.last.name }} : Victory {{ match.teams.last.name }}</label>
{% endif %}
{% endif %}
{% endif %}
</div>
{% endif %}
{% endfor %}
所以回顾一下，当我提交一个表单集时，如果它无效，所有其他表单集都会变成我刚刚提交的表单集，我不明白为什么。 如果您发现我所做的事情有问题，也请告诉我:)
编辑：views.py
...
#creation of forms
list_formset_set = []
for match in matches:
if match.isFinished == False:
formset_set = MatchSetFormset(request.POST or None, instance=match, prefix="form-" + str(match.pk) + "-match")
formset_set.match = match
list_formset_set.append(formset_set)
for formset_set in list_formset_set:
id_match_submit = request.POST.get("match_pk")
str_id_match_formet_set = str(formset_set.match.pk)
if id_match_submit == str_id_match_formet_set:
if formset_set.is_valid():
formset_set.save()
nb_set_winner_t1 = 0
nb_set_winner_t2 = 0
for set_match in formset_set:
if set_match.cleaned_data.get('scoreTeam1') == set_match.cleaned_data.get('scoreTeam2'):
nb_set_winner_t1 += 0
nb_set_winner_t2 -= 0
else:
if set_match.cleaned_data.get('scoreTeam1') > set_match.cleaned_data.get('scoreTeam2'):
nb_set_winner_t1 += 1
nb_set_winner_t2 -= 1
else:
nb_set_winner_t1 -= 1
nb_set_winner_t2 += 1
match = formset_set.cleaned_data[0].get('match')
team1 = formset_set.cleaned_data[0].get('match').teams.first()
team2 = formset_set.cleaned_data[0].get('match').teams.last()
if nb_set_winner_t1 == nb_set_winner_t2:
team1.totalpoints += sport.nbPointPerDraw
team2.totalpoints += sport.nbPointPerDraw
team1.save()
team2.save()
match.isFinished = True
match.save()
else:
if nb_set_winner_t1 > nb_set_winner_t2:
team1.totalpoints += sport.nbPointPerVictory
team1.nbVictory += 1
team2.totalpoints += sport.nbPointPerDefeat
team2.nbDefeat += 1
team1.save()
team2.save()
match.team1Win = True
match.isFinished = True
match.save()
else:
team1.totalpoints += sport.nbPointPerDefeat
team1.nbDefeat += 1
team2.totalpoints += sport.nbPointPerVictory
team2.nbVictory += 1
team1.save()
team2.save()
match.team2Win = True
match.isFinished = True
match.save()
teams = Team.objects.filter(pool__in=pools).order_by('-totalpoints') #"-" means descending
for index, team in enumerate(teams):
team.position = index + 1
return redirect('matches_phase_manage_tournament', id=id, id_phase=id_phase)
else:
# reload formsets
print("invalid")
环境：
请求方法：POST
请求网址：http://127.0.0.1:8000/tournament/admin-1/manage-phase/30-matches/
Django 版本：2.2
Python 版本：3.7.3
已安装的应用程序：
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'users.apps.UsersConfig',
'crispy_forms',
'类别',
'匹配',
'阶段'，
'游泳池'，
'规则',
'集'，
'运动',
'团队'，
'锦标赛',
“页面”，
'体育馆',
'字段']
已安装的中间件：
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
追溯：
内部文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\core\handlers\exception.py”
34. response = get_response(请求)
_get_response
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\core\handlers\base.py” 115. response = self.process_exception_by_middleware(e, request)
_get_response
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\core\handlers\base.py” 113. response = Wrapped_callback(request, *callback_args, **callback_kwargs)
match_phase_view
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\src\pages\views.py” 370. 打印（表单集）
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\utils\html.py” 388. klass.str = lambda self: mark_safe(klass_str(self))
str
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py” 64. 返回 self.as_table()
as_table 中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py”
404. forms = ' '.join(form.as_table() for form in self)
iter
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py” 68. 返回 iter(self.forms)
get
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\utils\functional.py” 80. res = instance.dict[self.name] = self.func(instance)
表单中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py”
136. for i in range(self.total_form_count())]
total_form_count 中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py”
110. return min(self.management_form.cleaned_data[TOTAL_FORM_COUNT], self.absolute_max)
get
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\utils\functional.py” 80. res = instance.dict[self.name] = self.func(instance)
management_form
中的文件“C:\Users\33643\Documents\Projets Django\TournamentManagerApp\lib\site-packages\django\forms\formsets.py” 92.code='missing_management_form',
异常类型：ValidationError at /tournament/admin-1/manage-phase/30-matches/
异常值：['ManagementForm 数据丢失或被篡改']
【问题讨论】：
-
这取决于你！只需关注
>>> import this -
很抱歉，如果我理解您的回答，我不确定
-
在python shell中运行
import this可以展现python的禅意。 Django 的文档很漂亮：docs.djangoproject.com/en/2.2/topics/forms/formsets -
我已经看过这个文档，但我没有看到我们如何在同一个视图中处理多个表单集
-
问题是你所有的表单集都有相同的前缀。查看生成的 HTML（在您的浏览器中），您会看到多个输入字段具有相同的
name属性。因此，在您的循环中，您需要 add a prefix 到每个更改每次迭代的表单集。您可以通过将prefix参数传递给您的表单集初始化程序来添加前缀。