【发布时间】：2017-05-14 15:45:15
【问题描述】：
我有一个带有两个下拉列表的 HTML 帖子，我想将这些列表中选定的 Country 发送到 views.py 中的 search() 方法，然后将我发送到 results 视图。每当我添加 government 和 location 作为 html POST 操作的参数或在搜索正则表达式中添加它们的值时，我尝试这个我从我的 index 页面得到一个 NoReverseMatch：
未找到带有参数“（”，“”）和关键字参数“{}”的“搜索”。尝试了 1 种模式：['search/(?P[A-Z]{3})/(?P[A-Z]{3})/']
我不会因为我做错了什么而导致这个错误。 （见代码中的cmets）
应用名称/views.py：
from django.shortcuts import get_object_or_404, render
from django.http import HttpResponseRedirect, HttpResponse
from .models import Country, Embassy
from django.template import loader
from django.urls import reverse
def index(request):
country = Country.objects.filter()
template = loader.get_template('appname/index.html')
context = {'countries': country}
return render(request, 'appname/index.html', context)
def results(request, government, location):
return HttpResponse("Here are the Embassies sent by %s, located in %s." % (government, location))
def search(request):
countries = Country.objects.all()
form = request.POST
if request.method == 'POST':
try:
selected_government = get_object_or_404(pk=request.POST['government'])
except (KeyError, Country.DoesNotExist):
return render(request, 'appname/index.html', {
'error_message': "You didn't select a government.",
})
try:
selected_location = get_object_or_404(pk=request.POST['location'])
except (KeyError, Country.DoesNotExist):
return render(request, 'appname/index.html', {
'error_message': "You didn't select a location.",
})
else:
return HttpResponseRedirect(reverse('appname:results', args=(selected_government.code,selected_location.code,)))
应用名称/模板/应用名称/index.html：
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
# government and location in the form action causes a NoReverse Match
<form action="{% url 'appname:search' government location %}" method="POST">
{% csrf_token %}
<label>Find Embassies sent by</label>
<select name="government">
{% for entry in countries %}
<option value="{{ entry.code }}">{{ entry.name }}</option>
{% endfor %}
</select>
<label>that are located in</label>
<select name="location">
{% for entry in countries %}
<option value="{{ entry.code }}">{{ entry.name }}</option>
{% endfor %}
</select>
<input type="submit" value="Search" />
</form>
urls.py:
from django.conf.urls import include, url
from django.contrib import admin
urlpatterns = [
url(r'^', include('appname.urls')),
url(r'^appname/', include('appname.urls')),
url(r'^admin/', admin.site.urls),
]
应用名称/urls.py:
from django.conf.urls import url
from . import views
app_name = 'appname'
urlpatterns = [
url(r'^$', views.index, name='index'),
url(r'^(?P<embassy_id>[0-9]+)/$', views.embassy_info, name='embassy_info'),
url(r'^(?P<code>[A-Z]{3})/$', views.country_info, name='country_info'),
url(r'^find/(?P<government>[A-Z]{3})/(?P<location>[A-Z]{3})/$', views.results, name='results'),
# the government and location values in search regex also cause a NoReverse Match
url(r'^search/(?P<government>[A-Z]{3})/(?P<location>[A-Z]{3})/', views.search, name='search'),
]
应用名称/models.py：
from django.db import models
class Country(models.Model):
code = models.CharField(primary_key=True, max_length=3)
name = models.CharField(max_length=50, db_column="Name")
def __str__(self):
return self.name
class Meta:
verbose_name = 'Country'
verbose_name_plural = 'Countries'
class Embassy(models.Model):
government = models.ForeignKey(Country, on_delete=models.CASCADE, related_name="government")
location = models.ForeignKey(Country, on_delete=models.CASCADE, related_name="location")
name = models.CharField(max_length=200, db_column="Name")
street_address = models.CharField(max_length=200, db_column="Address")
city = models.CharField(max_length=50, db_column="City")
phone_number = models.IntegerField(default=-1, db_column="Phone Number")
fax_number = models.IntegerField(null=True, blank=True, db_column="Fax Number")
email_address = models.CharField(max_length=200, db_column="Email")
website = models.CharField(max_length=200, db_column="Link")
def __str__(self):
return self.name
class Meta:
verbose_name = 'Embassy'
verbose_name_plural = 'Embassies'
【问题讨论】：