一個字符串的Python拆分值

Question

我正在Django背後構建的Python網站上工作（真棒框架，不能讓我的頭繞着python），我想分割一個從數據庫返回的字符串，我想當出現第一個空間，所以我想這樣的事情也被分裂，

{{product.name.split(' ' ,1)}} 

這沒有工作，我得到這個堆棧跟蹤，

Environment: 

Request Method: GET 
Request URL: http://website.co.uk/products/ 
Django Version: 1.1.1 
Python Version: 2.5.2 
Installed Applications: 
['django.contrib.auth', 
'django.contrib.admin', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'website.news', 
'website.store_locator', 
'website.css_switch', 
'website.professional', 
'website.contact', 
'website.shop', 
'tinymce', 
'captcha'] 
Installed Middleware: 
('django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware') 


Template error: 
In template /var/www/website/src/website/shop/templates/category.html, error at line 6 
    Could not parse the remainder: '(' ',1)' from 'product.name.split(' ',1)' 
    1 : {% extends "shopbase.html" %} 


    2 : {% block pageid %}shop{%endblock%} 


    3 : {% block right-content %} 


    4 : <div class="products"> 


    5 : <form method="post" action="{% url category category.slug %}"> 


    6 : {% for product in category.products.all %} 


    7 :  <div class="{% cycle 'clear' '' '' %}"> 


    8 :   <img src="{{MEDIA_URL}}{{product.mini_thumbnail}}" alt="{{product.name}}" class="thumbnail"/> 


    9 :   <div class="prod-details"> 


    10 :    <h3><a href="{% url shop.views.product category.slug product.slug %}">{{product.name.split(' ',1)}}</a></h3> 


    11 :    <p class="strap">{{ product.strap }}</p> 


    12 :    <ul> 


    13 :     <li class="price">&pound;{{product.price}}</li> 


    14 :     <li class="quantity"> 


    15 :      <select name="quantity_{{product.id}}"> 


    16 :       <option label="1" value="1">1</option> 


Traceback: 
File "/usr/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response 
    92.     response = callback(request, *callback_args, **callback_kwargs) 
File "/var/www/website/src/website/shop/views.py" in home 
    716.  return category(request, Category.objects.root_category(), data={'pageclass':'stylers'}) 
File "/var/www/website/src/website/shop/views.py" in category 
    738.  return render_to_response(template, data, RequestContext(request)) 
File "/usr/lib/python2.5/site-packages/django/shortcuts/__init__.py" in render_to_response 
    20.  return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) 
File "/usr/lib/python2.5/site-packages/django/template/loader.py" in render_to_string 
    103.   t = get_template(template_name) 
File "/usr/lib/python2.5/site-packages/django/template/loader.py" in get_template 
    82.  template = get_template_from_string(source, origin, template_name) 
File "/usr/lib/python2.5/site-packages/django/template/loader.py" in get_template_from_string 
    90.  return Template(source, origin, name) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in __init__ 
    168.   self.nodelist = compile_string(template_string, origin) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in compile_string 
    189.  return parser.parse() 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in parse 
    285.      compiled_result = compile_func(self, token) 
File "/usr/lib/python2.5/site-packages/django/template/loader_tags.py" in do_extends 
    169.  nodelist = parser.parse() 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in parse 
    285.      compiled_result = compile_func(self, token) 
File "/usr/lib/python2.5/site-packages/django/template/loader_tags.py" in do_block 
    147.  nodelist = parser.parse(('endblock', 'endblock %s' % block_name)) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in parse 
    285.      compiled_result = compile_func(self, token) 
File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py" in do_for 
    688.  nodelist_loop = parser.parse(('empty', 'endfor',)) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in parse 
    266.     filter_expression = self.compile_filter(token.contents) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in compile_filter 
    358.   return FilterExpression(token, self) 
File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in __init__ 
    538.    raise TemplateSyntaxError("Could not parse the remainder: '%s' from '%s'" % (token[upto:], token)) 

Exception Type: TemplateSyntaxError at /products/ 
Exception Value: Could not parse the remainder: '(' ',1)' from 'product.name.split(' ',1)' 

我想這意味着我可以做什麼，我想要在模板中直接做什麼？這是我的問題出現的地方，因爲我不知道我的觀點在哪裏做，我希望有人能指出我的正確方向？

這是我的看法，

def home(request): 
    """ 
    The home page, borrows functionality from category 
    """ 
    return category(request, Category.objects.root_category(), data={'pageclass':'stylers'}) 

def category(request, category_slug, template='category.html', data={}): 
    """ 
    Display a category in the store 
    """ 
    import re 

    category = get_object_or_404(Category, slug=category_slug) 
    basket = Basket(request) 

    if request.method == "POST": 
     for k, v in request.POST.iteritems(): 
      match = re.match('^add_to_basket_([0-9])+$',k) 
      if match: 
       id = match.group(1) 
       basket.add_item(Product.objects.get(id=id), request.POST['quantity_%s' % id]) 
       break 
     return HttpResponseRedirect(reverse('basket')) 

    data['category'] = category 

    return render_to_response(template, data, RequestContext(request)) 

def product(request, category_slug, product_slug): 
    """ 
    Display a product in the store, nominated by product_slug, that is in the 
    category nominated by category_slug 
    """ 

    data = {'pageclass':'irons'} 

    category = get_object_or_404(Category, slug=category_slug) 
    product = get_object_or_404(Product, slug=product_slug) 

    basket = Basket(request) 

    if request.method == "POST": 
     basket.add_item(product, request.POST['quantity']) 
     return HttpResponseRedirect(reverse('basket')) 

    data['category'] = category 
    data['product'] = product 

    return render_to_response('product.html', data, RequestContext(request)) 

如果需要我的模型，我可以張貼這件事沒問題。

我真的希望有人能幫助我。

非常感謝

Answer 1

可以調用使用{{ }}方法 - 但該方法不需要任何屬性。

我會在這種情況下做的是在您的模型上添加一個方法來執行所需的行爲。例如：

class Product(models.Model): 
    ... 
    def get_first_name(self): 
     if self.name: 
      return self.name.partition(' ')[0] 

     return None 

然後，在您的模板中，可以將其稱爲{{ product.get_first_name }}。

你的其他選擇是編寫一個自定義過濾器，這會稍微複雜一些。有關更多信息，請參見Django documentation on custom template tags。