Python objects.filter多個表

我想從我回來的對象中抽出關於特定教師的信息並將它們相互關聯？說我有以下表格：Python objects.filter多個表

導師：

 
id name   summary 
====================================== 
1  Joe   Bacon ipsum dolor sit 
2  John   Shankle venison tri-tip 
3  Jim   Spare ribs pastrami strip

課程：

 
id name   description     instructors 
===================================================================== 
1 algorithm  Bacon ipsum dolor sit   Joe, Tim 
2 python   Shankle venison tri-tip  John 
3 ruby on rails Spare ribs pastrami strip  Matt, Joe, Sean

評論：

 
id course_id   body 
================================================== 
1  1     Bacon ipsum dolor sit 
2  1     Shankle venison tri-tip 
3  2     Spare ribs pastrami strip 
4  2     Bacon ipsum dolor sit 
5  2     Bacon ipsum dolor sit 
6  3     Spare ribs pastrami strip

和以下功能獲取有關教練的信息，我如何爲特定教練提供評語（例如：Joe）？

def instructor(req, key): 
    instructor = get_object_or_404(Instructor, key=key) 
    courses = Course.objects.all_ordered(sort).filter(instructors=instructor) 

    reviews = Review.objects.filter(......) ???????? 

    return(req, 'blah.html', vars())

例如，如果教師是「喬」，變量「評論」應該有3個記錄：

 
id course_id   body 
================================================== 
1  1     Bacon ipsum dolor sit 
2  1     Shankle venison tri-tip 
6  3     Spare ribs pastrami strip

來源

2014-10-04 aznmunkey

講師= get_object_or_404（導師，鍵=鍵）

課程= Course.objects.all_ordered（sort）.filter（instructors = instructor）

reviews = Review.objects.filter（course__in = courses）

來源

2014-10-06 18:14:03 aznmunkey

Python objects.filter多個表

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