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Django QuerySet - 排序


排序

为了对 QuerySets 进行排序,Django 使用 order_by() 方法

示例

按姓名字段升序排序结果

mydata = Member.objects.all().order_by('firstname').values()
运行示例 »

在 SQL 中,上述语句将这样写

SELECT * FROM members ORDER BY firstname;

降序排序

默认情况下,结果按升序排序(最小的值排在最前面),要将方向更改为降序(最大的值排在最前面),请在字段名前使用减号 (NOT),-

示例

按姓名字段降序排序结果

mydata = Member.objects.all().order_by('-firstname').values()
运行示例 »

在 SQL 中,上述语句将这样写

SELECT * FROM members ORDER BY firstname DESC;

多个排序

要按多个字段排序,请在 order_by() 方法中用逗号分隔字段名称

示例

先按姓氏升序排序结果,然后按 ID 降序排序

mydata = Member.objects.all().order_by('lastname', '-id').values()
运行示例 »

在 SQL 中,上述语句将这样写

SELECT * FROM members ORDER BY lastname ASC, id DESC;


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