标注不返回预期的结果

我有一个模型在这里如下：标注不返回预期的结果

class Project(models.Model): 
    project_id = models.CharField(max_length=10, blank=False, primary_key=True) 
    title = models.CharField(max_length=128, blank=False,) 
    start_date = models.DateField(null=False) 
    end_date = models.DateField(null=True) 
    total_amount = models.DecimalField(max_digits=10, decimal_places=2) 
    raised_amount = models.DecimalField(max_digits=10, decimal_places=2) 
    cause = models.ForeignKey('Cause', on_delete=models.SET('cause not set')) 
    ngo_id = models.ForeignKey('NGO', on_delete=models.SET('ngo not set')) 
    zip = models.IntegerField(blank = True) 
    reimagine_fees=models.DecimalField(max_digits=10, decimal_places=3,default=0.05) 
    person_of_contact = models.CharField(max_length = 100) 
    summary = models.TextField(blank = False) 
    story = models.TextField(blank = True) 
    fb_description=models.CharField(max_length = 301,blank=True) 
    tax_exemption_available = models.BooleanField(default=False) 
    banner = models.TextField(blank=True) 
    team_member_id = models.ForeignKey(Team_Member, on_delete=models.SET('team member not set')) 
    project_page_desc = models.CharField(max_length=300, blank=True) 

    def __str__(self): 
     return self.title

我试图根据资金percetages筛选项目的对象，也就是raised_amount和total_amount的比例..我为此使用注释。但是，过滤器并没有按照我预期的那样给出结果。我的过滤器查询是：

project_list = project_list.annotate(x=F('raised_amount')/F('total_amount')).exclude(x__gte=0.8) 

project_list = project_list.annotate(x=F('raised_amount')/F('total_amount')).exclude(x__lte=0.2) 

project_list = project_list.annotate(x=F('raised_amount')/F('total_amount')).exclude(x__lte=1, end_date__gte=datetime.date.today())

project_list是所有Project对象的查询集。

帮助我在这里...

来源

2017-05-19 Arjun Mehra

你期待什么？ – e4c5

......这与你实际得到的有什么不同？ –

如果project_list是一个字典，你为什么要尝试对它进行标注？你应该在QuerySet –

projects = Project.objects.all() # projects is a queryset 

project_list = projects.annotate(x=F('raised_amount')/F('total_amount')).exclude(x__gte=0.8)

尝试你标注的查询集，而不是字典。

来源

2017-05-19 13:48:20 pramod

标注不返回预期的结果

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