问NoReverseMatch at /project

EN

from django.contrib import admin
from django.urls import path
from django.conf.urls import url,include
from mapp import views 

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
path('admin/', admin.site.urls),
url(r'^$',views.AboutView.as_view(),name='about'),
url(r'^blogs/$',views.BlogsView.as_view(),name='blog'),
url(r'^project/$',views.ProjectListView.as_view(),name='project_list'), 
url(r'^project/(?P<pk>\d+)/$',views.ProjectDetailView.as_view(),name='project_detail'),
url(r'^project/create/$',views.ProjectCreateView.as_view(),name='project_create'),
url(r'^project/(?P<pk>\d+)/$',views.ProjectUpdateView.as_view(),name='update'),
]+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

from django.shortcuts import render,redirect
from django.views.generic import TemplateView,ListView,DetailView,CreateView,UpdateView
from mapp.models import Project
from mapp.forms import ProjectCreateForm,ProjectUpdateForm

# Create your views here.

class AboutView(TemplateView):
    template_name='about.html'

class BlogsView(TemplateView):
    template_name='blogs.html'

class ProjectListView(ListView):
    model=Project

class ProjectDetailView(DetailView):
    model=Project

class ProjectCreateView(CreateView):
    model=Project
    form_class=ProjectCreateForm
    redirect_field_name='mapp/project_detail.html'

class ProjectUpdateView(UpdateView):
    model=Project
    form_class=ProjectUpdateForm
    redirect_field_name='mapp/project_detail.html'

{% extends 'base.html'%}

{% block content %}
<h1>Project Details</h1>
    <div class="container">
        <h2>{{project.pname}}</h2>
        <img src="{{project.pimage.url}}"></img>
        <h2>{{project.ptech}}</h2>
        <h2>{{project.pdetails}}</h2>
    </div>

    <div class="container">
        <p><a href="{%url 'update' pk=self.pk %}">Update</a>
    </div>

{% endblock %}

from django import forms
from mapp.models import Project

class ProjectCreateForm(forms.ModelForm):   
    class Meta:
        model=Project
        fields=('pname','pimage','ptech','pdetails')

class ProjectUpdateForm(forms.ModelForm):   
    class Meta:
        model=Project
        fields=('pname','pimage','ptech','pdetails')

{% extends 'base.html' %}

{% block content %}

<form class="project-form" method="POST" enctype="multipart/form-data">
    <div class="jumbotron">
        {% csrf_token %}
        {{form.as_p}}
        <button type="submit" class="save btn btn-default">Save</button>
    </div>
</form>

{% endblock %}