Django中模型Model添加JSON类型字段的方法

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Release: 2016-06-10 15:10:29
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本文实例讲述了Django中模型Model添加JSON类型字段的方法。分享给大家供大家参考。具体如下:

Django里面让Model用于JSON字段,添加一个JSONField自动类型如下:

class JSONField(models.TextField): 
  __metaclass__ = models.SubfieldBase 
  description = "Json" 
  def to_python(self, value): 
    v = models.TextField.to_python(self, value) 
    try: 
      return json.loads(v)['v'] 
    except: 
      pass 
    return v 
  def get_prep_value(self, value): 
    return json.dumps({'v':value}) 

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之后就直接为Model定义JSONField类型字段了

class Category(models.Model): 
  name = fields.MedialNameField() 
  other= fields.JSONField() 

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使用很方便:

复制代码 代码如下:
Category.objects.create(name="C1", other=(1,2,3,4,5))

所有可以被json序列化的类型都可以直接赋值给other字段,很方便吧。

希望本文所述对大家的Python程序设计有所帮助。

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