由于我是Stack Overflow的一位印象深刻的读者，我想在这里问我的第一个问题。由于我遇到了代码片段的问题，我不知道我是犯了错误还是我正在使用的代码中的错误。
我为自己的网站修改了这段代码：
http://blog.tkbe.org/archive/django-admin-search-functionality/
它工作正常，它真的是一个很棒的片段。 但如果我的搜索查询长度为2，我认为结果不正确。
例如，如果我在名字和姓氏中搜索“re”，我会得到以下结果：
Mr. Tom Krem
Ms. Su Ker
这很奇怪。对于长度为＆gt;的查询2我没有遇到这个问题。 所以也许这篇文章读了一个使用上面代码片段的人，可以告诉我他/她是否遇到同样的问题。
如果没有其他人遇到问题，我至少知道我的代码中有错误。也许是我正在使用的形式，或者在请求上下文中搞砸了什么。
我该如何解决这个问题？
编辑1：
from django import template
from crm.views import SEARCH_VAR
def my_search_form(context):
return {
'context': context,
'search_var': SEARCH_VAR
}
register = template.Library()
register.inclusion_tag('custom_utilities/my_search_form.html')(my_search_form)
my_search_form.html：<div id="toolbar"><form
id="changelist-search"
action=""
method="get">
<div><!-- DIV needed for valid HTML -->
<label
for="searchbar"><img src="{{ context.media_url }}/crm/img/search.png"
class="icon"
alt="Search" /></label>
<input
type="text"
size="40"
name="{{ search_var }}"
value="{{ context.query }}"
id="searchbar" />
<input type="submit" value="Search" />
</div>
</form>
</div>
<script
type="text/javascript">document.getElementById("searchbar").focus();
</script>
@login_required
def crm_contacts(request):
query = request.GET.get('q', '')
#pass additional params to the SortHeaders function
#the additional params will be part of the header <a href...>
#e.g. use it for pagination / use it to provide the query string
additional_params_dict = {'q': query}
foundContacts = search_contact(request,query)
sort_headers = SortHeaders(request, LIST_HEADERS, default_order_field=1, additional_params=additional_params_dict)
if foundContacts is not None:
contact_list = foundContacts.order_by(sort_headers.get_order_by())
else:
contact_list = Contact.objects.order_by(sort_headers.get_order_by())
context = {
'contact_list' : contact_list,
'headers': list(sort_headers.headers()),
'query' : query,
}
return render_to_response("crm/contact_list.html", context,
context_instance=RequestContext(request))
#models
from crm.models import Contact
from django.db.models import Q
'''
A search form from
http://blog.tkbe.org/archive/django-admin-search-functionality/
adapted to search for contacts.
'''
def search_contact(request,terms=None):
if terms is None:
return Contact.objects.all()
query = Contact.objects
for term in terms:
query = query.filter(
Q(first_name__icontains=term)
| Q(last_name__icontains=term))
return query
另一个编辑：
我正在使用此代码段对表格进行排序。可能应该知道这一点，以便理解上面发布的代码。
由于我无法发布链接（垃圾邮件防护），我将尝试解释在哪里找到它。转到Google。输入：django snippet table sort
然后它应该是第二击。排序表标题。代码片段308。
编辑：添加SortHeaders（）函数
ORDER_VAR = 'o'
ORDER_TYPE_VAR = 'ot'
class SortHeaders:
"""
Handles generation of an argument for the Django ORM's
``order_by`` method and generation of table headers which reflect
the currently selected sort, based on defined table headers with
matching sort criteria.
Based in part on the Django Admin application's ``ChangeList``
functionality.
"""
def __init__(self, request, headers, default_order_field=None,
default_order_type='asc', additional_params=None):
"""
request
The request currently being processed - the current sort
order field and type are determined based on GET
parameters.
headers
A list of two-tuples of header text and matching ordering
criteria for use with the Django ORM's ``order_by``
method. A criterion of ``None`` indicates that a header
is not sortable.
default_order_field
The index of the header definition to be used for default
ordering and when an invalid or non-sortable header is
specified in GET parameters. If not specified, the index
of the first sortable header will be used.
default_order_type
The default type of ordering used - must be one of
``'asc`` or ``'desc'``.
additional_params:
Query parameters which should always appear in sort links,
specified as a dictionary mapping parameter names to
values. For example, this might contain the current page
number if you're sorting a paginated list of items.
"""
if default_order_field is None:
for i, (header, query_lookup) in enumerate(headers):
if query_lookup is not None:
default_order_field = i
break
if default_order_field is None:
raise AttributeError('No default_order_field was specified and none of the header definitions given were sortable.')
if default_order_type not in ('asc', 'desc'):
raise AttributeError('If given, default_order_type must be one of \'asc\' or \'desc\'.')
if additional_params is None: additional_params = {}
self.header_defs = headers
self.additional_params = additional_params
self.order_field, self.order_type = default_order_field, default_order_type
# Determine order field and order type for the current request
params = dict(request.GET.items())
if ORDER_VAR in params:
try:
new_order_field = int(params[ORDER_VAR])
if headers[new_order_field][1] is not None:
self.order_field = new_order_field
except (IndexError, ValueError):
pass # Use the default
if ORDER_TYPE_VAR in params and params[ORDER_TYPE_VAR] in ('asc', 'desc'):
self.order_type = params[ORDER_TYPE_VAR]
def headers(self):
"""
Generates dicts containing header and sort link details for
all defined headers.
"""
for i, (header, order_criterion) in enumerate(self.header_defs):
th_classes = []
new_order_type = 'asc'
if i == self.order_field:
th_classes.append('sorted %sending' % self.order_type)
new_order_type = {'asc': 'desc', 'desc': 'asc'}[self.order_type]
yield {
'text': header,
'sortable': order_criterion is not None,
'url': self.get_query_string({ORDER_VAR: i, ORDER_TYPE_VAR: new_order_type}),
'class_attr': (th_classes and ' class="%s"' % ' '.join(th_classes) or ''),
}
def get_query_string(self, params):
"""
Creates a query string from the given dictionary of
parameters, including any additonal parameters which should
always be present.
"""
params.update(self.additional_params)
return '?%s' % '&'.join(['%s=%s' % (param, value) \
for param, value in params.items()])
def get_order_by(self):
"""
Creates an ordering criterion based on the current order
field and order type, for use with the Django ORM's
``order_by`` method.
"""
return '%s%s' % (
self.order_type == 'desc' and '-' or '',
self.header_defs[self.order_field][1],
)
答案 0 :(得分：0)
如果您运行manage.py shell，然后运行：
>>> from crm.models import Contact
>>> from django.db.models import Q
>>> list=Contact.objects.filter(Q(first_name__icontains='re')|Q(last_name__icontains='re'))
>>> print list
输出是什么？
编辑：是的，所以如果你尝试：
>>> list=Contact.objects.filter(Q(first_name__icontains='mot')|Q(last_name__icontains='mot'))
>>> print list
（我正试图缩小给你问题的条款，我看到了你的上一条评论）
输出是什么？
编辑：如果以上两个查询都在shell中工作，那么其他东西正在某处修改您的查询集并添加一些额外的标准......
您确定sort_headers()不是仅使用order by子句修改查询集吗？您可以将sort_headers()发布到您的问题吗？