python - Django for 循环的倒数第二个迭代

Question

tabbed_fieldset.html 指出:

    if forloop.counter0 > 0 and forloop.last
           #do stuff`

我只是写在一个单独的文件中:

for fieldset in adminform
    if not forloop.last
        include "admin/includes/tabbed_fieldset.html"
    else
         include "admin/includes/geo_fieldset.html"
     endif 
 endfor

所以现在 tabbed_fieldset.html 的代码将不再有效，因为如果它是 forloop.last，它甚至不会在 tabbed_fieldset 中。 html，它将在 geo_fieldset.html 中。

有没有简单的方法把forloop.last改成forloop second to last？

Answer 1

感谢您的代码!查看此网站:https://docs.djangoproject.com/en/1.8/ref/templates/builtins/

The for loop sets a number of variables available within the loop:

forloop.counter - The current iteration of the loop (1-indexed)

forloop.counter0 - The current iteration of the loop (0-indexed)

forloop.revcounter - The number of iterations from the end of the loop (1-indexed)

forloop.revcounter0 - The number of iterations from the end of the loop (0-indexed)

forloop.first - True if this is the first time through the loop

forloop.last - True if this is the last time through the loop

forloop.parentloop - For nested loops, this is the loop surrounding the current one

基本上，您会使用 forloop.revcounter 或 forloop.revcounter0

for fieldset in adminform
    if forloop.revcounter0 > 1
        include "admin/includes/tabbed_fieldset.html"
    else
        include "admin/includes/geo_fieldset.html"
    endif
endfor