我是 Django 的新手,来自 PHP 世界。我试图在计算完之后将一个字段“添加”到查询集中,但不知道该怎么做。在 PHP 中,我只需在数组中添加一列并将我的内容存储在其中。
这是我的代码:
def (id):
mystuff_details = mystuff_details.objects.filter(stuff_id=id)
newthing = '';
for mystuff in mystuff_details:
newthing_lists = //some query to get another queryset
for newthing_list in newthing_lists:
newthing = newthing_list.stuffIwant
//Here I want to make some computation, and ADD something to newthing, let's say:
to_add = (mystuff.score+somethingelse)
//I've heard about the .append but I'm sure I'm screwing it up
newthing.append(to_add)
所以基本上在我的模板中,我希望能够调用:
{% for newthings_list %}
{{ newthing.to_add }}
{% 结束 %}
TL;博士:我基本上想从我的数据库中检索一个列表,并在这个对象列表中添加一个包含计算值的字段。
如果不清楚,请告诉我,我很难从 php 切换到 django 哈哈。
谢谢!
编辑:
所以,我正在尝试使用字典,但我必须错过逻辑:
def (id):
mystuff_details = mystuff_details.objects.filter(stuff_id=id)
newthing = {};
for mystuff in mystuff_details:
newthing_lists = //some query to get another queryset
for newthing_list in newthing_lists:
//Newthing_list can have several times the same I, and the scores need to add up
if newthing[newthing_list.id] > 0: //This doesn't seem to work and throws an error (KeyError)
newthing[newthing_list.id] = newthing[newthing_list.id] + some_calculated_thing
else:
newthing[newthing_list.id] = some_calculated_thing
然后当我开始工作时,我不知道如何在模板中访问它:
{% for id in my_list %}
{{newthing[id]}} ? Or something like newthing.id ?
{% end %}
谢谢!
最佳答案
为什么不使用字典?
newthing = {}
newthing['your_key'] = to_add
在模板中,您可以通过以下方式访问字典值:
{{newthing.your_key}}
或者,如果您有字典,请使用 for 循环
关于Django - 将字段添加到查询集以存储计算结果,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12118776/