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12月12日
build定义:collection.build(attributes = {}, …) 本例子中collection换成cart_items. 说明:这个method返回一个或多个new objects of the associated type.但关联的对象尚未保存。需要save. Creat ...
分类:其他好文   时间:2017-12-12 12:24:37    阅读次数:125
Open quote is expected for attribute "{1}" associated with an element type "
这个错误在启动tomcat产生的严重错误,我的配置文件缺少一个引号; 经过仔细检查,发现是我把我项目直接部署到tomcat的配置文件(server。xml)中时,发生的错误 错误代码为: <Context path="" docBase=C:\Users\Administrator\Workspac ...
分类:其他好文   时间:2017-11-14 11:19:03    阅读次数:269
053-397
Which of the following tasks does the tool Incident Packaging Service (IPS) perform?A. Cleans up the ADR by deleting files not associated with an inci ...
分类:其他好文   时间:2017-11-13 19:47:18    阅读次数:141
053-564
Your database has experienced a loss of datafile users_01.dbf, which is associated with a ablespace called USERS. The database is still running. Which ...
分类:其他好文   时间:2017-11-08 19:41:58    阅读次数:110
PURGE 的用法说明
PURGE PurposeUse the PURGE statement to remove a table or index from your recycle bin and release all of the space associated with the object, or to r ...
分类:其他好文   时间:2017-11-06 18:00:03    阅读次数:170
2017ICPC南宁赛区网络赛 The Heaviest Non-decreasing Subsequence Problem (最长不下降子序列)
Let SSS be a sequence of integers s1s_{1}s?1??, s2s_{2}s?2??, ........., sns_{n}s?n?? Each integer is is associated with a weight by the following rul ...
分类:其他好文   时间:2017-09-25 21:54:50    阅读次数:387
数据库查询速度慢了?是否是因为死锁了?一种解决死锁的方法。
--查询哪些表被死锁 select request_session_id spid,OBJECT_NAME(resource_associated_entity_id) tableName from sys.dm_tran_locks where resource_type='OBJECT' --查... ...
分类:数据库   时间:2017-09-21 11:19:47    阅读次数:179
EF There is already an open DataReader associated with this Command
捕捉到 System.InvalidOperationException _HResult=-2146233079 _message=意外的连接状态。在使用包装提供程序时,请确保在已包装的 DbConnection 上实现 StateChange 事件。 HResult=-2146233079 解决 ...
分类:其他好文   时间:2017-09-05 16:48:02    阅读次数:216
makefile 里的vpath
https://www.cmcrossroads.com/article/basics-vpath-and-vpath Only missing prerequisites matching the pattern are searched using the associated path. So ...
分类:其他好文   时间:2017-09-01 16:59:14    阅读次数:150
Hibernate中的merge方法
Hibernate中有一个常见的错误: A different object with the same identifier value was already associated with the session 在一个session中存在两个不同的实体却有着相同的身份标签(主键)是会报错的, ...
分类:Web程序   时间:2017-08-27 11:12:21    阅读次数:183
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