current path didnt match in django - django

Question

i want get my album.object.all() coding running in my web site. i have included data but after putting it in urls.py file it doesnt find the path to response. please help me.
this is django 1.11.2
my urls.py file
from django.conf.urls import url
from django.contrib import admin
from myapp import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^$', views.home, name='home'),
url(r'^album/?$', views.music, name='music'),
url(r'^album/(?P<album_id>\d+)/$', views.detail, name='detail'),
url(r'^Database/?$', views.Database, name='Database'),
]
my views.py file
from django.shortcuts import render
from django.http import HttpResponse
from myapp.models import Album
# Create your views here.
def home(request):
return render(request, 'index.html')
def music(request):
all_albums = Album.objects.all()
context ={'all_albums': all_albums,}
return render(request, 'album.html', context)
def detail(request, album_id):
return HttpResponse("<h2>Details for album id: " + str(album_id) + "</h2>")
def Database(request):
return render(request, 'data.html')
my model.py page
from django.db import models
class Album(models.Model):
artist = models.CharField(max_length=250)
album_title = models.CharField(max_length=500)
genre = models.CharField(max_length=100)
album_logo = models.CharField(max_length=1000)
def __str__(self):
return self.album_title+ ' - ' +self.artist
class Song(models.Model):
Album = models.ForeignKey(Album, on_delete=models.CASCADE)
#any songs of the related to the deleted album will be deleted
file_type = models.CharField(max_length=10)
song_title = models.CharField(max_length=200)
want to use it get the whole directory by <pk>=album_id