如何实现Post / Redirect / Get in django分页？ [英] How to implement Post/Redirect/Get in django pagination?
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问题描述
我有一个看法，过滤掉发布搜索表单的结果：
def profile_advanced_search（request）：
args = {}
如果request.method ==POST：
form = AdvancedSearchForm（request.POST）
qs = []
如果form.is_valid（）：
cd = form.cleaned_data
s_country = cd ['country']
s_province = cd ['province']
s_city = cd ['city']
如果s_country：qs.append（Q（country__icontains = s_country））
如果s_province：qs.append（Q（province__icontains = s_province））
如果s_city：qs.append Q（city__icontains = s_city））
f =无
q中的q：
如果f为无：
f = q
else：f& = q
list = UserProfile.objects.filter（f）.order_by（' - created_at'）
else：
form = AdvancedSearchForm（）
list = UserProfile.objects.all（）。order_by（' - created_at'）
paginator = Paginator（list，10 ）
page = request.GET.get（'page'）
try：
results = paginator.page（page）
except PageNotAnInteger：
results = paginator。 （1）
除了EmptyPage：
results = paginator.page（paginator.num_pages）
args.update（csrf（request））
args ['form'] = form
args ['results'] = results
return render_to_response（'userprofile / advanced_search.html'，args，
context_instance = RequestContext（request））
urls.py部分是：
url（r'^ search / $'，'userprofile.views.profile_advanced_search'），
模板是：
< form action = / search /method =post> {％csrf_token％}
< ul class =list-unsyled>
< li>< h3>国家< / h3>< / li>
< li> {{form.country}}< / li>< br>
< h4>省< / h4>
< li> {{form.province}}< / li>
< h4>城市< / h4>
< li> {{form.city}}< / li>
< / ul>
< input type =submitname =submitvalue =search/>
< / form>
搜索结果：
{％in p in results％}
< div>
< div>
< br>
< strong>< a href =/ profile / {{p.username}}> {{p.username}}< / a>< / strong>
{{p .country}}< br>
{{p.province}}< br>
{{p.city}}< br>
< / div> ;
< / div>
{％endfor％}
< div>
< div class =pagination >
{％if results.has_previous％}
< a href =？page = {{results.previous_page_number}}><< Prev< / a> &b
{％endif％}
{％if results.has_next％}
< a href =？page = {{results.next_page_number}} > Next&g吨;> < / A>
{％endif％}
< / div>
< / div>
< / div>
这些工作适用于第一页，但是为了处理以后的页面，它是建议，我需要实现Post / Redirect / Get。 / p>
但是，我很难使这样的视图/模板/网址处理GET页面，所有的搜索参数是任意的。所以我感谢一个完整的解决方案。
解决方案
需要 2 视图。第一个用于表单搜索，第二个显示结果。您没有在您的示例代码中以任何方式实施重定向！
urls
...
url（r'^ search / $'，
'userprofile.views.profile_advanced_search'），
url（r'^ show /（？P< country> \w +）/（？P< province> \w +）/（？P< site> \w +）/（？P< page> \d + 'userprofile.views.profile_advanced_show'），
...
profile_advanced_search
def profile_advanced_search（request）：
args = {}
if request.method = =POST：
form = AdvancedSearchForm（request.POST）
qs = []
如果form.is_valid（）：
cd = form.cleaned_data
s_country = cd ['country']
s_province = cd ['province']
s_city = cd ['city']
return HttpResponseRedirect（
反向（'userprofile.view
args =（s_country，s_province，s_city，0，））
返回HttpResponseRedirect（
reverse（'userprofile.views.profile_advanced_show'，
args =（'+'，'+'，'+'，0，）））
profile_advanced_show
def profile_advanced_show（request，s_country =''，
s_province =' '，s_city =''，page = 0）
f = s_country，s_province和s_city的一些过滤器
list = UserProfile.objects.filter（f）.order_by（' - created_at'）
paginator = Paginator（list，10）
try：
results = paginator.page（page）
except PageNotAnInteger：
results = paginator.page（1）
除了EmptyPage：
results = paginator.page（paginator.num_pages）
args.update（csrf（request））
form = AdvancedSearchForm（initial = {'s_country'：s_country，...}）
args ['form'] = form
args ['results'] = results
return render_to_response userprofile / advanced_search.html'，args，
context_instance = RequestContext（request））
通知：提交不正确的表单提交。记住，您可以通过GET将参数发送到第二个视图作为键值，而不是路由值。
I have a view that filters out results for a posted search form:
def profile_advanced_search(request):
args = {}
if request.method == "POST":
form = AdvancedSearchForm(request.POST)
qs=[]
if form.is_valid():
cd = form.cleaned_data
s_country=cd['country']
s_province=cd['province']
s_city = cd['city']
if s_country: qs.append(Q(country__icontains = s_country))
if s_province: qs.append( Q(province__icontains=s_province))
if s_city: qs.append( Q(city__icontains=s_city))
f = None
for q in qs:
if f is None:
f=q
else: f &=q
list = UserProfile.objects.filter(f).order_by('-created_at')
else:
form = AdvancedSearchForm()
list = UserProfile.objects.all().order_by('-created_at')
paginator = Paginator(list,10)
page= request.GET.get('page')
try:
results = paginator.page(page)
except PageNotAnInteger:
results = paginator.page(1)
except EmptyPage:
results = paginator.page(paginator.num_pages)
args.update(csrf(request))
args['form'] = form
args['results'] = results
return render_to_response('userprofile/advanced_search.html', args,
context_instance=RequestContext(request))
the urls.py part is:
url(r'^search/$', 'userprofile.views.profile_advanced_search'),
The template is:
<form action="/search/" method="post">{% csrf_token %}
<ul class="list-unstyled">
<li><h3>Country</h3></li>
<li>{{form.country}}</li><br>
<h4>Province</h4>
<li>{{form.province}}</li>
<h4>City</h4>
<li>{{form.city}}</li>
</ul>
<input type="submit" name="submit" value="search" />
</form>
Search Results:
{% for p in results %}
<div">
<div>
<br>
<strong><a href="/profile/{{p.username}}" >{{p.username}}</a></strong>
{{p.country}} <br>
{{p.province}} <br>
{{p.city}} <br>
</div>
</div>
{% endfor %}
<div>
<div class="pagination">
{% if results.has_previous %}
<a href="?page={{ results.previous_page_number }}"> << Prev </a>  
{% endif %}
{% if results.has_next %}
<a href="?page={{ results.next_page_number }}"> Next >> </a>
{% endif %}
</div>
</div>
</div>
These work fine for the first page, but to deal with the later pages, it is suggested that I need to implement Post/Redirect/Get .
However I have had difficulty to make such views/template/urls to deal with GET pages regarding that all of the search parameters are arbitrary. So I appreciate a complete solution.
解决方案
Do you need 2 views. First one for form search and second one to show results. You have not implemented redirect in any way in your sample code!
urls
...
url(r'^search/$',
'userprofile.views.profile_advanced_search'),
url(r'^show/(?P<country>\w+)/(?P<province>\w+)/(?P<site>\w+)/(?P<page>\d+)',
'userprofile.views.profile_advanced_show'),
...
profile_advanced_search
def profile_advanced_search(request):
args = {}
if request.method == "POST":
form = AdvancedSearchForm(request.POST)
qs=[]
if form.is_valid():
cd = form.cleaned_data
s_country=cd['country']
s_province=cd['province']
s_city = cd['city']
return HttpResponseRedirect(
reverse('userprofile.views.profile_advanced_show',
args=(s_country, s_province, s_city, 0, )))
return HttpResponseRedirect(
reverse('userprofile.views.profile_advanced_show',
args=('+', '+', '+', 0, )))
profile_advanced_show
def profile_advanced_show(request, s_country='',
s_province='', s_city='', page=0):
f = some filters with s_country, s_province and s_city
list = UserProfile.objects.filter(f).order_by('-created_at')
paginator = Paginator(list,10)
try:
results = paginator.page(page)
except PageNotAnInteger:
results = paginator.page(1)
except EmptyPage:
results = paginator.page(paginator.num_pages)
args.update(csrf(request))
form = AdvancedSearchForm(initial={ 's_country': s_country, ... } )
args['form'] = form
args['results'] = results
return render_to_response('userprofile/advanced_search.html', args,
context_instance=RequestContext(request))
Notice: improve it for not valid form submissions. Remember you can send parameters to second view via GET as key value instead route values.
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