6
我試圖從現有數據實時創建表...但是,我需要的表有雙主鍵。我無法找到如何滿足限制。由於雙主鍵無法映射ForeignKey
I.e.我先從下面兩個表...
self.DDB_PAT_BASE = Table('DDB_PAT_BASE', METADATA,
Column('PATID', INTEGER(), primary_key=True),
Column('PATDB', INTEGER(), primary_key=True),
Column('FAMILYID', INTEGER()),
)
self.DDB_ERX_MEDICATION_BASE = Table('DDB_ERX_MEDICATION_BASE', METADATA,
Column('ErxID', INTEGER(), primary_key=True),
Column('ErxGuid', VARCHAR(length=36)),
Column('LastDownload', DATETIME()),
Column('LastUpload', DATETIME()),
Column('Source', INTEGER()),
)
當我嘗試以下方法,它的工作原理...
t = Table('testtable', METADATA,
Column('ErxID', INTEGER(), ForeignKey('DDB_ERX_MEDICATION_BASE.ErxID')),
)
t.create()
但是,下面的兩個給我的錯誤...
t = Table('testtable', METADATA,
Column('PATID', INTEGER(), ForeignKey('DDB_PAT_BASE.PATID')),
)
t.create()
t = Table('testtable', METADATA,
Column('PATID', INTEGER(), ForeignKey('DDB_PAT_BASE.PATID')),
Column('PATDB', INTEGER(), ForeignKey('DDB_PAT_BASE.PATDB')),
)
t.create()
sqlalchemy.exc.OperationalError: (pymssql.OperationalError) (1776, "There are no primary or candidate keys in the referenced table 'DDB_PAT_BASE' that match the referencing column list in the foreign key 'FK__testtabl__PATID__3FD3A585'.DB-Lib error message 20018, severity 16:\nGeneral SQL Server error: Check messages from the SQL Server\nDB-Lib error message 20018, severity 16:\nGeneral SQL Server error: Check messages from the SQL Server\n") [SQL: '\nCREATE TABLE [testtable] (\n\t[PATID] INTEGER NULL, \n\tFOREIGN KEY([PATID]) REFERENCES [DDB_PAT_BASE] ([PATID])\n)\n\n']
美麗。謝謝! – RightmireM