Python Django:从getter方法返回的models.CharField（）值为空

这是我的模型课。在本文中，我添加了一个新的getter方法

url（）

，用于返回作者配置文件的url字符串。但当我在html模板文件中调用这个方法时，它显示为空

请看以下是我的使用示例：

作者模型类：

from django.db import models
import re

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=64)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')

    # On Python 3: def __str__(self):
    def __unicode__(self):
        return self.name

    @property
    def url(self):
        return re.sub(r"[\s|\.|\-|\_|\'|\+]+", "-", self.name)

from django.shortcuts import render

from author.models import Author

def index(request):
    authors = Author.objects.order_by('-name')
    return render(request, 'home.html', {
                                         'authors': authors
                                         })

{% if authors %}
    {% for author in authors %}
    <h2><a href="author/{{ author.url }}/">{{ author.name }}</a></h2>
    <p>About author {{ author.name }} here</p>
    {% endfor %}
{% else %}
No Authors
{% endif %}

<h2><a href="author//">XXX</a></h2>
<p>About author XXX here</p>
...

<h2><a href="author/xxx/">XXX</a></h2>
<p>About author XXX here</p>
...

将

作者

对象上下文从视图方法传递到模板：

from django.db import models
import re

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=64)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')

    # On Python 3: def __str__(self):
    def __unicode__(self):
        return self.name

    @property
    def url(self):
        return re.sub(r"[\s|\.|\-|\_|\'|\+]+", "-", self.name)

from django.shortcuts import render

from author.models import Author

def index(request):
    authors = Author.objects.order_by('-name')
    return render(request, 'home.html', {
                                         'authors': authors
                                         })

{% if authors %}
    {% for author in authors %}
    <h2><a href="author/{{ author.url }}/">{{ author.name }}</a></h2>
    <p>About author {{ author.name }} here</p>
    {% endfor %}
{% else %}
No Authors
{% endif %}

<h2><a href="author//">XXX</a></h2>
<p>About author XXX here</p>
...

<h2><a href="author/xxx/">XXX</a></h2>
<p>About author XXX here</p>
...

并在模板（home.html）中使用以下命令：

from django.db import models
import re

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=64)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')

    # On Python 3: def __str__(self):
    def __unicode__(self):
        return self.name

    @property
    def url(self):
        return re.sub(r"[\s|\.|\-|\_|\'|\+]+", "-", self.name)

from django.shortcuts import render

from author.models import Author

def index(request):
    authors = Author.objects.order_by('-name')
    return render(request, 'home.html', {
                                         'authors': authors
                                         })

{% if authors %}
    {% for author in authors %}
    <h2><a href="author/{{ author.url }}/">{{ author.name }}</a></h2>
    <p>About author {{ author.name }} here</p>
    {% endfor %}
{% else %}
No Authors
{% endif %}

<h2><a href="author//">XXX</a></h2>
<p>About author XXX here</p>
...

<h2><a href="author/xxx/">XXX</a></h2>
<p>About author XXX here</p>
...

{%if作者%}
{作者中的作者%}
关于作者{{author.name}这里

{%endfor%}
{%else%}
没有作者
{%endif%}

获取输出：

from django.db import models
import re

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=64)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')

    # On Python 3: def __str__(self):
    def __unicode__(self):
        return self.name

    @property
    def url(self):
        return re.sub(r"[\s|\.|\-|\_|\'|\+]+", "-", self.name)

from django.shortcuts import render

from author.models import Author

def index(request):
    authors = Author.objects.order_by('-name')
    return render(request, 'home.html', {
                                         'authors': authors
                                         })

{% if authors %}
    {% for author in authors %}
    <h2><a href="author/{{ author.url }}/">{{ author.name }}</a></h2>
    <p>About author {{ author.name }} here</p>
    {% endfor %}
{% else %}
No Authors
{% endif %}

<h2><a href="author//">XXX</a></h2>
<p>About author XXX here</p>
...

<h2><a href="author/xxx/">XXX</a></h2>
<p>About author XXX here</p>
...

关于作者XXX

...

期望：

from django.db import models
import re

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=64)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')

    # On Python 3: def __str__(self):
    def __unicode__(self):
        return self.name

    @property
    def url(self):
        return re.sub(r"[\s|\.|\-|\_|\'|\+]+", "-", self.name)

from django.shortcuts import render

from author.models import Author

def index(request):
    authors = Author.objects.order_by('-name')
    return render(request, 'home.html', {
                                         'authors': authors
                                         })

{% if authors %}
    {% for author in authors %}
    <h2><a href="author/{{ author.url }}/">{{ author.name }}</a></h2>
    <p>About author {{ author.name }} here</p>
    {% endfor %}
{% else %}
No Authors
{% endif %}

<h2><a href="author//">XXX</a></h2>
<p>About author XXX here</p>
...

<h2><a href="author/xxx/">XXX</a></h2>
<p>About author XXX here</p>
...

关于作者XXX

...

我想我有些东西。与其定义模型的属性，不如定义如下全局函数（在视图文件中）：

然后在索引视图中添加以下内容：

for author in authors:
    url(author)
    #print author.url

---

您是否检查了您的

re.sub

调用是否确实返回了预期的字符串？除了空字符串问题之外：您是否查看了，并且？re.sub没有问题。显示为空，即使我返回

self.name

也只返回

re.sub（r“[\s\.\.\-\\\\\\\\'\\+]+，“-”，self.name）

@alko是的，我已将author对象传递给template请显示视图代码。实际上不是。因为从

url（）

方法返回的字符串对于不同的模型类型是不同的。类似于Post

url（）

将返回类似以下内容：“/news/2013/11/06/news Post title as slug/440/”@VINAYKr.SHARMA抱歉，我以为您只需要针对作者模型的解决方案。如果您需要其他内容，请编辑您的问题。。。