b2286df65ce6_change_referred_row_from_string_to_text_.py 文件源码

def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.alter_column('statistic_visitor', 'referred',
               existing_type=mysql.VARCHAR(collation=u'utf8_unicode_ci', length=128),
               nullable=True)
    ### end Alembic commands ###