annotate（）添加超过需要

我的注释（sum（））函数有一个小问题。现在我想要它做的是在列表中列出给定计划中所有到期日的总数。它为第一个做。下面的代码：annotate（）添加超过需要

#get the invesments maturing this year 
     for p in plans: 
      cur_inv = Investment.objects.all().filter(plan = p).order_by('financial_institution').filter(maturity_date__year = current_year) 
      nxt_inv = Investment.objects.all().filter(plan = p).order_by('financial_institution').filter(maturity_date__year = next_yr) 
      thr_inv = Investment.objects.all().filter(plan = p).order_by('financial_institution').filter(maturity_date__year = thr_yr) 
      fr_inv = Investment.objects.all().filter(plan = p).order_by('financial_institution').filter(maturity_date__year = fr_yr) 
      fv_inv = Investment.objects.all().filter(plan = p).order_by('financial_institution').filter(maturity_date__year = fv_yr) 

      for inv in cur_inv: 
       total += inv.amount or 0 
      for inv in cur_inv: 
       total_m += inv.maturity_amount or 0 

      for inv in nxt_inv: 
       total2 += inv.amount or 0 
      for inv in nxt_inv: 
       total_m2 += inv.maturity_amount or 0 

      for inv in thr_inv: 
       total3 += inv.amount or 0 
      for inv in thr_inv: 
       total_m3 += inv.maturity_amount or 0 

      for inv in fr_inv: 
       total4 += inv.amount or 0 
      for inv in fr_inv: 
       total_m4 += inv.maturity_amount or 0 

      for inv in fv_inv: 
       total5 += inv.amount or 0 
      for inv in fv_inv: 
       total_m5 += inv.maturity_amount or 0 

#Calculate the holding totals with each company 
      total_list = p.investment_set.filter(maturity_date__gte= '%s-1-1' % current_year).values('financial_institution__abbr').annotate(Sum('maturity_amount')).order_by('financial_institution__abbr') 
      gtotal = total_m + total_m2 + total_m3 + total_m4 + total_m5 

      plan_list.append({ 
       'plan':p, 
       'investment': cur_inv, 
       'nxt_inv': nxt_inv, 
       'thr_inv': thr_inv, 
       'fr_inv': fr_inv, 
       'fv_inv': fv_inv, 
       'total_list': total_list, 
       'grand': gtotal, 
      })

我唯一的问题现在是，当它进入到下一步的计划，但它仍然不是回到0

添加到总计，难道我失去了一些东西？

任何帮助，将不胜感激。

感谢

来源

2011-11-01 TheLifeOfSteve

您似乎编辑了太多的代码来正确地帮助您。 'total_m *'变量来自哪里？ –

@ChrisPratt我会更新它。 – TheLifeOfSteve

您使用+=与total_m*增值经销商，但从未将其复位0在循环。他们不会自动重置，只是因为新的迭代已经开始。

FWIW，你应该尝试在这里优化你的代码。您正在生成6 * len（计划）查询，这可能相当昂贵。

来源

2011-11-01 16:53:32

谢谢，这工作......我会考虑优化我的查询。 – TheLifeOfSteve

annotate（）添加超过需要

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