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我有以下型號:Django的jeft連接查詢
class TestCaseStatus(models.Model):
name = models.CharField(default='n/a', max_length=50)
def __str__(self):
return self.name
class TestCase(models.Model):
id = models.CharField(unique=True, max_length=100, primary_key=True)
name = models.CharField(default='n/a', max_length=200)
def __str__(self):
return self.name
class TestRun(models.Model):
test_id = models.ForeignKey(TestCase)
run_id = models.CharField(max_length=100, default='0')
datetime = models.DateTimeField()
status = models.ForeignKey(TestCaseStatus)
messages = models.CharField(default='n/a', max_length=500)
def __str__(self):
return self.run_id, self.test_id, self.status
我想執行下面的SQL查詢:
select a.test_id_id, a.status_id, b.status_id
from runscompare_testrun as a
left join runscompare_testrun as b on a.test_id_id = b.test_id_id
where a.run_id = 1 and b.run_id=2
SQL輸出:
我假設有是一個Django的方式來避免使用raw()調用,但我似乎無法找到它。