The filter and exclude methods return QuerySet objects that can be chained together and can even perform joins. The q4 query below will find jobs posted since January 1st, 2006, in Cleveland, Ohio
filter和exclude方法返回一些QuerySet对象，这些对象可以链接在一起，甚至可以执行连接操作。
The filter and exclude methods return QuerySet objects that can be chained together and can even perform joins. The q4 query below will find jobs posted since January 1st, 2006, in Cleveland, Ohio
filter和exclude方法返回一些QuerySet对象，这些对象可以链接在一起，甚至可以执行连接操作。
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