回答編集履歴
2
fixed typo\.
test
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@@ -1,4 +1,4 @@
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1
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クエリを
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1
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クエリを複数回投げることにはなりますが、こんな感じでしょうか。
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2
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3
3
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4
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1
よくない例だったので修正
test
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@@ -2,34 +2,24 @@
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2
2
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3
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4
4
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5
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-
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6
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-
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7
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-
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8
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-
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9
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```
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5
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+
````python
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10
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-
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11
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-
# 20歳以下のメンバーが10人以上いるチームを抽出
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6
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7
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qs = (
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8
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15
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-
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9
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+
Team.objects
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10
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17
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-
.
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11
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+
.annotate(member_count=Count('member__id'))
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12
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19
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.annotate(member_count=Count('team_id'))
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20
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-
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21
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.filter(age__lte=20, member_count__gte=10)
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.filter(member__age__lte=20, member_count__gte=10)
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14
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)
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16
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25
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for
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for team in qs:
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18
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27
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print(
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print('Team.id:{}, MemberCount: {}'.format(team.id, team.member_count))
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20
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29
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-
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21
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for member in team.member_set.filter(age__lte=20).all():
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22
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31
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-
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23
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print('Member.id:{}'.format(member.id))
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32
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-
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33
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print(member.name)
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34
24
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35
25
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```
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