Djang中urlpatterns之间共享变量

Question

这是我的网址.py

from django.conf.urls import patterns, url, include
from geartables import views
from geartables.views import DataTable


urlpatterns = patterns('',
                       url(r'^$', views.index, name='index'),
                       url(r'^data/$', DataTable.as_view(), name='DataTable'),
                       url(r'^(?P<product_type>[\w\-]+)/$', views.table, name='table'),
)

当用户转到“localhost/table/”时，将从模板生成一个页面。在该模板中有一个{%url%}标记，它调用DataTable类（以创建JSON数据）。

我的问题是我怎样才能在课堂上得到数据视图.py调用我的变量？

是这样的：

^{pr2}$

编辑：

在视图.py公司名称：

...
def table(request, product_type):
    ptype = ProductType.objects.get(url_name=product_type)
    datatable = 'DataTable'
    context = {'mselectmenus': ptype.mselects, 'columns': ptype.columnlist, 'datatable':'DataTable}
    return render(request, 'geartables/dtcode.html', context)

class DataTable(BaseDatatableView):

    p = ProductType.objects.get(name=<product_type>)
    model = p.modelname
    columnlist = p.columnlist  # ex: [["th_pic","Picture"],["brand_name", "Brand"]]
    mselects = p.mselects
    ranges = p.ranges
    max_display_length = 2000

    def __init__(self):
        self.columns = [item[0] for item in self.columnlist]
        self.order_columns = self.columns

    #multiple select filters

    def mselectmenus(p):
        mselectmenu = []
        for item in p.mselects:
            mselectmenu.append(
                [item[1], item[0], p.model.objects.values_list(item[0], flat=True).order_by(item[0]).distinct()])
        return mselectmenu


    #initial render
    def render_column(self, row, column):
        if column == 'th_pic':
            return '<a href=' + row.lg_pic + '><img src=' + row.th_pic + ' /></a>'
        elif column == 'description':
            return ''
        else:
            return super(DataTable, self).render_column(row, column)

    #filtering
    def filter_queryset(self, qs):
        #search bar
        ssearch = self.request.GET.get('sSearch', None)
        if ssearch:
            qs = qs.filter(Q(brand_name__icontains=ssearch) | Q(product_name__icontains=ssearch) | Q(
                rope_type__icontains=ssearch) | Q(length__icontains=ssearch) | Q(diameter__icontains=ssearch) | Q(
                weight__icontains=ssearch) | Q(falls__icontains=ssearch) | Q(color__icontains=ssearch))

        #mselect
        ssearch_1 = self.request.GET.get('sSearch_1', None)
        if ssearch_1:
            qs = qs.filter(Q(brand_name__regex=ssearch_1))

        return qs
...

模板代码：

...
$(document).ready(function() {
    var dtable = $('#{{ ptable }}').dataTable( {
        //"oLanguage": oLanguages,
        "sDom": 'C<"clear">lfrtip',
        "aoColumns": [
            { "bSortable": false, "bSearchable:": false, "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": false,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": true,  "sClass": "center" },
            { "bSortable": true, "bSearchable:": false,  "sClass": "center" },
        ],
        "bProcessing": true,
        "bServerSide": true,
        "sAjaxSource": "{% url datatable %}",
    });
...

Answer 1

好的，那么使用{% url view_name param1 param2 ... %}可以将参数（param1，param2，…）传递给视图。视图名称是您在url中为视图定义的名称urlpatterns。在

因此，您必须使用以下url:

url(r'^data/<product_type>/$', DataTable.as_view(), name='DataTable'),

然后，要在您的DataTable中捕获这个product_type，您必须在其中实现dispatch方法：

def dispatch(self, request, *args, **kwargs):
        self.product_type= kwargs.pop("product_type")
        return super(LanguageMixin, self).dispatch(request, *args, **kwargs)

编辑：另一种方法是让url如您所拥有并使用GET 如果要将其作为GET参数传递，则捕捉它的最佳位置是get_context_method中：

^{pr2}$

为了将其捕获为GET参数，必须正确地构造URL，并附加GET参数。像这样：

<a href="{% url view_name %}?product_type={{ some_product_type }}">

请记住，{% url view_name %}只构造字符串，不进行重定向