Question

我的models.py包含一个包含两个外键的模型：

class TestcaseHasCategory(models.Model):
    testcase_idtestcase = models.ForeignKey(Testcase, models.DO_NOTHING, db_column='Testcase_idTestcase')  # Field name made lowercase.
    Category_idCategory = models.ForeignKey(Category, models.DO_NOTHING, db_column='Category_idCategory')  # Field name made lowercase.

    class Meta:
        managed = False
        db_table = 'testcase_has_category'
        unique_together = (('testcase_idtestcase', 'Category_idCategory'),)

在Django shell打印中，该表的对象为我提供了这个输出：

>>> TestcaseHasCategory.objects.all()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "c:\Python27\lib\site-packages\django\db\models\query.py", line 232, in _
_repr__
    data = list(self[:REPR_OUTPUT_SIZE + 1])
  File "c:\Python27\lib\site-packages\django\db\models\query.py", line 256, in _
_iter__
    self._fetch_all()
  File "c:\Python27\lib\site-packages\django\db\models\query.py", line 1087, in
_fetch_all
    self._result_cache = list(self.iterator())
  File "c:\Python27\lib\site-packages\django\db\models\query.py", line 54, in __
iter__
    results = compiler.execute_sql()
  File "c:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 83
5, in execute_sql
    cursor.execute(sql, params)
  File "c:\Python27\lib\site-packages\django\db\backends\utils.py", line 79, in
execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "c:\Python27\lib\site-packages\django\db\backends\utils.py", line 64, in
execute
    return self.cursor.execute(sql, params)
  File "c:\Python27\lib\site-packages\django\db\utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "c:\Python27\lib\site-packages\django\db\backends\utils.py", line 64, in
execute
    return self.cursor.execute(sql, params)
  File "c:\Python27\lib\site-packages\django\db\backends\mysql\base.py", line 11
0, in execute
    return self.cursor.execute(query, args)
  File "c:\Python27\lib\site-packages\MySQLdb\cursors.py", line 202, in execute
    self.errorhandler(self, exc, value)
  File "c:\Python27\lib\site-packages\MySQLdb\connections.py", line 36, in defau
lterrorhandler
    raise errorclass, errorvalue
OperationalError: (1054, "Unknown column 'testcase_has_category.id' in 'fiel
d list'")

我的其他模型是可打印的，只有多对多的关系才会产生问题。有什么想法吗？

Django中的多对多表不起作用

0 个答案: