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sqlachemy 获取新创建对象的id,flush与commit

<div class="cnblogs_Highlighter">
<pre class="brush:python;gutter:true;"> for account_info in valid_account_detail:
try:
account = account_info.get('account')
password = account_info.get('password')

date = account_info.get('date')

                    q1 = account_info.get('q1')
                    a1 = account_info.get('a1')
                    q2 = account_info.get('q2')
                    a2 = account_info.get('a2')
                    q3 = account_info.get('q3')
                    a3 = account_info.get('a3')

                    s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>1 = resource_apple_account.get_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_by_question_answer(q1,a1)
                    s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>2 = resource_apple_account.get_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_by_question_answer(q2,a2)
                    s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>3 = resource_apple_account.get_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_by_question_answer(q3,a3)
                    if not s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>1:  # 判断<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>中是否存<a href="https://www.jb51.cc/tag/zaizhe/" target="_blank" class="keywords">在这</a>个数据,没有则新建
                        s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>1 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>(question=q1,answer=a1)
                        db.session.add(s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>1)
                        # 如果<a href="https://www.jb51.cc/tag/zaizheli/" target="_blank" class="keywords">在这里</a>写了commit,后面也可以取到这个新建数据的id,但是后面新建account对象时也要commit,
                        # 如果出现问题,rollback只会回滚最后一次commit,这里的就不能一起回滚了

                    if not s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>2:
                        s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>2 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>(question=q2,answer=a2)
                        db.session.add(s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>2)

                    if not s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>3:
                        s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>3 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>(question=q3,answer=a3)
                        db.session.add(s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>3)

                    # 新建对象
                    account_obj = resource_apple_account.AppleAccountCore(account=account,password=password,creator_id=creator.id)
                    db.session.add(account_obj)



                    db.session.flush()
                    # 将数据刷新到<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>,这样才能取到新建对象的id,其实commit()也可以,但是为了保证rollback,
                    # 将整个事件回滚,所有用的flush,commit<a href="https://www.jb51.cc/tag/mo/" target="_blank" class="keywords">默</a>认这次事件完成了,rollback只能回滚此次事件最后一次commit的<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>,
                    # 如果在上面还有其他commit,则上面commit的<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>不会被回滚,可以任务flush只是把数据先存入<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>,
                    # 但是此次事件还有彻底结束,但是commit就是彻底结束了

                    map1 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>Map(apple_account_core_id=account_obj.id,apple_account_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_id=s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>1.id)
                    map2 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>Map(apple_account_core_id=account_obj.id,apple_account_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_id=s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>2.id)
                    map3 = resource_apple_account.AppleAccountS<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>Map(apple_account_core_id=account_obj.id,apple_account_s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>_id=s<a href="https://www.jb51.cc/tag/ecurity/" target="_blank" class="keywords">ecurity</a>3.id)
                    db.session.add_all([map1,map2,map3])
                    db.session.commit()

                except Exception as e:
                    print u'<a href="https://www.jb51.cc/tag/cuowu/" target="_blank" class="keywords">错误</a>信息',e
                    db.session.rollback()
                    return rest_base.restful_json(data=u'<a href="https://www.jb51.cc/tag/tianjia/" target="_blank" class="keywords">添加</a>失败',code=406)

            return rest_base.restful_json(data=u'<a href="https://www.jb51.cc/tag/tianjia/" target="_blank" class="keywords">添加</a>成功')

  

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