详解Django中views数据查询使用locals()函数进行优化

def index(request):
  threatname = '威胁情报展示'
  url = 'www.testtip.com'
  allthreat = Threat.objects.all()
  #推荐位的威胁情报
  rec = Threat.objects.filter(rec__id=1)[:3]
  #情报标签
  threat_tags = Tag.objects.all()
  #将上述数据封装至上下文中
  context = { 
      'threatname': threatname,
      'url': url,
      'allthreat': allthreat,
      'rec':rec,
      'threat_tags':threat_tags,
  }
  #通过render传递上下文至模板templates
  return render(request,'index.html',context)
def threatshow(request,tid):
  allthreat = Threat.objects.all()
  #推荐位的威胁情报
  rec = Threat.objects.filter(rec__id=1)[:3]
  #情报标签
  threat_tags = Tag.objects.all()
  # 热门情报数据
  hot_threat = Threat.objects.filter(hot__id=x)[:6]
  #将sitename&url&allarticle封装至上下文中
  context = { 
      'allthreat': allthreat,
      'rec':rec,
      'threat_tags':threat_tags,
      'hot_threat':hot_threat,
  }
  return render(request, 'threatshow.html',context)

allthreat = Threat.objects.all()
  #推荐位的威胁情报
  rec = Threat.objects.filter(rec__id=1)[:3]
  #情报标签
  threat_tags = Tag.objects.all()

# 全局定义常用查询数据参数
def global_variable(request):
  allthreat = Threat.objects.all()
  #推荐位的威胁情报
  rec = Threat.objects.filter(rec__id=1)[:3]
  #情报标签
  threat_tags = Tag.objects.all()
  return locals()
views 中定义上述全局变量后，通过locals()函数优化如下：

def index(request):
  threatname = '威胁情报展示'
  url = 'www.testtip.com'
  #通过render传递上下文至模板templates
  return render(request,'index.html',locals())
def threatshow(request,tid):
  # 热门情报数据
  hot_threat = Threat.objects.filter(hot__id=x)[:6]
  return render(request, 'threatshow.html',locals())