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ekko
V2EX  ›  Python

关于 Python 的 class.objects.filter()

  •  
  •   ekko · May 5, 2017 · 3658 views
    This topic created in 3438 days ago, the information mentioned may be changed or developed.

    使用 redisco 时发现 objects 这个类是从哪继承来的?求解惑

    from redisco import models
    
    class Person(models.Model):
        name = models.Attribute(required=True)
        created_at = models.DateTimeField(auto_now_add=True)
        fave_colors = models.ListField(str)
    
    person = Person(name="nama")
    person.save()
    
    abc = Person.objects.filter(name = "nama")[0]
    print abc.name
    
    
    dikT
        1
    dikT  
       May 6, 2017 via Android
    这是 django.很多人都说,我们应该知其原理,但是我觉得,你应该先会使它,扯别的都 tm 卵用
    PythonAnswer
        2
    PythonAnswer  
       May 6, 2017
    黄字 models.Model
    PythonAnswer
        3
    PythonAnswer  
       May 6, 2017
    Model.objects 如果不自定义, django 会默认分配你一个 objects = models.Manager()
    wwqgtxx
        4
    wwqgtxx  
       May 6, 2017
    @PythonAnswer @dikT 请仔细看,这是 redisco,只不过它是模仿了 django 的接口而已
    根本实现一般是通过一个 metaclass 实现的,那个 metaclass 是加在 models.Model 上被连带继承了
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