擅长:python、mysql、java
<p>外键只需要是元组。。。所以写<code>['campaign_id']</code>而不是<code>('campaign_id',)</code></p>
<pre><code>op.create_table('location_messages',
[...]
sa.Column('campaign_id', sa.Integer(), nullable=True),
sa.ForeignKeyConstraint(('campaign_id',), ['campaigns.id'], ),
sa.PrimaryKeyConstraint('id')
)
</code></pre>