看来，当我使用 addSomething 函数创建附加关联时，Sequelize 会更新每个现有关联，将关联的 id 字段标记为 NULL，然后使用关联的 id 再次重新更新它们中的每一个。他们到底为什么要这样做，更重要的是，我该如何阻止它？
number.addCall(call).success(function(call){
console.log("addCall");
});
和控制台输出：
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CAe843623d58ae3453910ce0a8e6ae065b',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='6',"id"=24,"createdAt"='2013-04-24 18:12:44.695000',"updatedAt"='2013-04-30 19:19:38.392000',"deletedAt"=NULL,"PhonenumberId"=NULL WHERE "id"=24 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CA8045f80aee98e334d57deb3a31140f7f',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='5',"id"=25,"createdAt"='2013-04-25 17:35:46.919000',"updatedAt"='2013-04-30 19:19:38.393000',"deletedAt"=NULL,"PhonenumberId"=NULL WHERE "id"=25 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CAd0c476c2f790944cd4962651a86ee299',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='6',"id"=26,"createdAt"='2013-04-30 18:42:01.838000',"updatedAt"='2013-04-30 19:19:38.393000',"deletedAt"=NULL,"PhonenumberId"=NULL WHERE "id"=26 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CAe843623d58ae3453910ce0a8e6ae065b',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='6',"id"=24,"createdAt"='2013-04-24 18:12:44.695000',"updatedAt"='2013-04-30 19:19:38.394000',"deletedAt"=NULL,"PhonenumberId"=1 WHERE "id"=24 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CA8045f80aee98e334d57deb3a31140f7f',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='5',"id"=25,"createdAt"='2013-04-25 17:35:46.919000',"updatedAt"='2013-04-30 19:19:38.395000',"deletedAt"=NULL,"PhonenumberId"=1 WHERE "id"=25 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CAd0c476c2f790944cd4962651a86ee299',"direction"='inbound',"callstatus"='completed',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"='6',"id"=26,"createdAt"='2013-04-30 18:42:01.838000',"updatedAt"='2013-04-30 19:19:38.395000',"deletedAt"=NULL,"PhonenumberId"=1 WHERE "id"=26 RETURNING *
Executing: UPDATE "Calls" SET "from"='+16159572942',"to"='+16159002621',"callsid"='CAca700726a04726c976baeec0b3b11714',"direction"='inbound',"callstatus"='ringing',"fromcity"='NASHVILLE',"fromstate"='TN',"fromzip"='37115',"fromcountry"='US',"callduration"=NULL,"id"=27,"createdAt"='2013-04-30 19:19:38.328000',"updatedAt"='2013-04-30 19:19:38.396000',"deletedAt"=NULL,"PhonenumberId"=1 WHERE "id"=27 RETURNING *
addCall
它需要做的就是更新一条记录，即变量“call”所代表的记录。一旦有数千个或更多与一个号码相关的呼叫，这最终会破坏数据库。