【发布时间】：2018-08-14 12:03:14
【问题描述】：
我正在构建一个使用 Django 进行设备管理的站点。我目前正在使用this tutorial to help me get started.
我希望在浏览器的 url 栏中显示的 url 显示如下内容：
127.0.0.1:8000/catalog/model/model_number
但目前，当我单击每个单独的模型时，它只显示一个整数，例如 1、2、3 等。
这是我的urls.py：
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
path('books/', views.BookListView.as_view(), name='books'),
path('book/<int:pk>', views.BookDetailView.as_view(), name='book-detail'),
path('models/', views.ModelListView.as_view(), name='models'),
path('model/<int:pk>', views.ModelDetailView.as_view(), name='model-detail'),
]
我知道path('model/<int:pk>'... 是应该更改的部分。我试过path('model/model.model_number>'... 但这会输出以下错误：
Reverse for 'model-detail' with arguments '('2',)' not found. 1 pattern(s) tried: ['catalog\\/model\\/\\<model\\.model_number\\>$']
这是我的models.py：
from django.db import models
from django.urls import reverse #Used to generate URLs by reversing the URL patterns
import uuid
import datetime
# Create your models here.
class Genre(models.Model):
"""Model representing book genre"""
name = models.CharField(max_length = 200, help_text = 'Enter book genre')
def __str__(self):
"""String for represnting model object."""
return self.name
class Book(models.Model):
"""Model representing a book (but not a specific copy of a book)"""
title = models.CharField(max_length = 200)
author = models.ForeignKey('Author', on_delete = models.SET_NULL, null = True)
# Foreign Key used because book can only have one author, but authors can have multiple books
# Author as a string rather than object because it hasn't been declared yet in the file.
summary = models.TextField(max_length = 1000, help_text = 'Enter brief descp. of book') #TextField for longer descp.
isbn = models.CharField('ISBN', max_length = 13, help_text = '13 character <a href="https://www.isbn-international.org/content/what-isbn">ISBN number</a>')
#ManyToManyField used because genre can contain many books. Books can cover many genres.
#Genre class has already been defined so we can specify the object above.
genre = models.ManyToManyField(Genre, help_text = 'Select genre for this book') #Genre capitalized, calling model up
def __str__(self):
"""String for representing the Model object."""
return self.title
def get_absolute_url(self):
"""returns the URL to access a detail record for this book."""
return reverse('book-detail', args=[str(self.id)])
class BookInstance(models.Model):
"""Model representing a specific copy of a book"""
id = models.UUIDField(primary_key = True, default = uuid.uuid4, help_text = 'Unique ID for this book across whole library')
book = models.ForeignKey('Book', on_delete=models.SET_NULL, null = True)
imprint = models.CharField(max_length = 200)
due_back = models.DateField(null = True, blank = True) #could do date scanned (date.now())
LOAN_STATUS = ( #could be ownership! Or make more of these for location
('m', 'Maintenance'), #being worked on, cleaned after field
('o', 'On loan'), #in the field
('a', 'Available'), #ready to go
('r', 'Reserved'), #in the field, could add one for 'being tested'
)
status = models.CharField(
max_length = 1,
choices = LOAN_STATUS,
blank = True,
default = 'm',
help_text = 'Book availability',
)
class Meta:
ordering = ['due_back']
def __str__(self):
"""String for representing the Model object."""
return f'{self.id} ({self.book.title})' #Will pop up on admin page as this
class Author(models.Model):
"""Model representing an author"""
first_name = models.CharField(max_length = 100)
last_name = models.CharField(max_length = 100)
date_of_birth = models.DateField(null = True, blank = True)
date_of_death = models.DateField('Died', null = True, blank = True)
class Meta:
ordering = ['last_name', 'first_name']
def get_absolute_url(self):
"""Returns the url to access a particular author instance."""
return reverse('author-detail', args=[str(self.id)])
def __str__(self):
"""String for representing the Model object."""
return f'{self.last_name}, {self.first_name}' #Will pop up on admin page as this
class Location(models.Model):
town_city_base = models.CharField('Town/City/Base', max_length = 25, help_text="If location is classified enter CLASSIFIED in CAPS")
state = models.CharField(max_length = 25)
country = models.CharField(max_length = 25)
class Meta:
ordering = ['town_city_base', 'state', 'country']
def get_absolute_url(self):
#Returns the url to access a particular location instance
return reverse('location-detail', args=[str(self.id)])
def __str__(self):
#String for representing the Model object
return f'{self.town_city_base}, {self.state}, {self.country}'
class Category(models.Model):
category = models.CharField('Equipment Type', max_length = 50, help_text = "Enter general category of equipment")
class Meta:
verbose_name_plural = "categories" #default would have shown as "Categorys" on admin page
def __str__(self):
return self.category
class Manufacturer(models.Model):
manufacturer = models.CharField(max_length = 50, help_text = "Original manufacturer or supplier")
def __str__(self):
return self.manufacturer
class Model(models.Model):
model_number = models.CharField('Model Number', max_length = 50)
manufacturer = models.ForeignKey('Manufacturer', on_delete = models.SET_NULL, null = True)
category = models.ForeignKey('Category', on_delete = models.SET_NULL, null = True)
description = models.TextField(max_length = 1000, help_text = "Enter brief description of product", null = True) #TextField for longer descriptions
def __str__(self):
return f'{self.model_number}..........{self.description}'
def get_absolute_url(self):
#Returns the url to access a particular location instance
return reverse('model-detail', args=[str(self.id)])
class Ownership(models.Model):
ownership = models.CharField('Ownership', max_length = 50)
class Meta:
verbose_name_plural = "Owners"
def __str__(self):
return self.ownership
def get_absolute_url(self):
return reverse('ownership-detail', args=[str(self.id)])
class ModelInstance(models.Model):
asset = models.CharField('Asset Number', max_length = 50, help_text = "Enter Weston or Government I.D. Tag Number")
model = models.ForeignKey('Model', on_delete = models.SET_NULL, null = True, help_text = "Leave blank if no model number exists")
serial = models.CharField('Serial Number', max_length = 50, null = True, blank = True, help_text = "Leave blank if no serial number exists")
location = models.ForeignKey('Location', on_delete = models.SET_NULL, null = True, help_text = "Enter current location or location after manufacturing")
ownership = models.ForeignKey('Ownership', on_delete = models.SET_NULL, null = True, help_text = "Enter current owner of equipment")
STATUS = (
('M', 'Maintenance'), #being worked on, not available
('D', 'Deployed'), #in the field
('A', 'Available'), #ready to go
('R', 'Reserved'), #Being used for classified/other project
('K', 'Broken'), #Broken
)
status = models.CharField(
max_length = 1,
choices = STATUS,
blank = True,
default = 'A',
help_text = 'Equipment Availability',
)
note = models.TextField('Notes', max_length = 1000, null = True, blank = True)
date_added = models.DateField("Date Added", default=datetime.date.today)
def __str__(self):
return f'Asset Number: {self.asset}..........Serial Number: {self.serial}..........Location: {self.location}..........Ownership: {self.ownership}'
【问题讨论】：
标签： django django-models django-urls