你如何从Grails中的休眠会话中断开一个对象？ [英] How do you disconnect an object from it's hibernate session in grails?

问题描述

具有相同标识符值的另一个对象已与会话相关联

p>

它看起来像我需要从休眠会话中删除dbObject。

  def object = messageParserService.parseMessage（messageType，messageText）
 def dbObject = object.getClass（）。findByIdentifier（object.identifier）
 if（dbObject！= null）{
 object.id = dbObject.id 
 object.dateCreated = dbObject.dateCreated 
} 
 if（！object.save（））{
 object.errors.each {println it} 
 } 
  

解决方案

dbObject.discard（） / b>

  def object = messageParserService.parseMessage（messageType，messageText）
 def dbObject = object.getClass（）。findByIdentifier（object .identifier）
 if（dbObject！= null）{
 object.id = dbObject.id 
 object.dateCreated = dbObject.dateCreated 
 dbObject.discard（）
} 
 if（！object.save（））{
 object.errors.each {println it}} 
} 
  code> 

请参阅 GORM discard（）文档。

I'm trying to do this, but I get the error.

"a different object with the same identifier value was already associated with the session"

It looks like I need to remove dbObject from the hibernate session.

def object = messageParserService.parseMessage(messageType, messageText)
def dbObject = object.getClass().findByIdentifier(object.identifier)
if(dbObject != null){
    object.id = dbObject.id
    object.dateCreated = dbObject.dateCreated
}
if(!object.save()) {
    object.errors.each {println it}
}

解决方案

dbObject.discard() did the trick.

def object = messageParserService.parseMessage(messageType, messageText)
def dbObject = object.getClass().findByIdentifier(object.identifier)
if(dbObject != null){
    object.id = dbObject.id
    object.dateCreated = dbObject.dateCreated
    dbObject.discard()
}
if(!object.save()) {
    object.errors.each {println it}
}

See the GORM discard() documentation.

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