我們可以使用Django中的用戶定義管理器執行SQL查詢嗎？

Question

下面是我的模型細節

class QuesManager(db.Manager): 
    def with_counts(self): 
     from django.db import connection 
     cursor = connection.cursor() 
     cursor.execute(""" 
      SELECT Q.question, Q.title, Q.qid, V.up_qid, V.down_qid 
      FROM Question Q, Votes_ques V 
      WHERE Q.qid=V.qid 
      ORDER BY 3 DESC""") 
     result_list = [] 
     for row in cursor.fetchall(): 
      p = self.model(question=row[0], title=row[1], up_vote=row[2], down_vote=row[3]) 
      result_list.append(p) 
     return result_list 

class dummy(db.Model): 
    obj = QuesManager() 

class Question(db.Model): 
    userid = db.CharField(max_length=50) 
    posted = db.DateTimeField(auto_now=True) 
    question = db.TextField(max_length=500) 
    qid = db.AutoField(primary_key=True) 
    title = db.TextField(max_length=80) 
    tags = db.ManyToManyField('Tags') 

class Votes_ques(db.Model): 
    qid = db.ForeignKey('Question') 
    up_qid = db.IntegerField() 
    down_qid = db.IntegerField() 

from mysite.answers.models import dummy 
from mysite.answers.models import Votes_ques 
from mysite.answers.models import Question 

呢，Vote = dummy.obj.all()會給所有結果集QuesManager類中查詢。任何人都有這個想法...

謝謝！

Answer 1

也許你只是在尋找這樣的：

questions = Question.objects.all() 
for question in questions: 
    votes = question.votes_ques_set.all()