的Grails 2.5.0的持久對象空ID

Question

當我試圖挽救receiveTransaction我得到這個例外

Caused by: org.postgresql.util.PSQLException: ERROR: null value in column "letter_id" violates not-null constraint Detail: Failing row contains (5, 0, RECEIVE, 67, nraed, 2015-06-22 12:56:17.111, null, ملوخية, 3, null, 1, f, 1, DONE, ps.police.parchive.LetterTransaction, null). at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2161) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1890) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:560) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:363) ... 9 more

信的hasMany letterTransaction

LetterTransaction域：

class LetterTransaction { 
ActionEnum action 
Date dateTime 
Party party 
ArchiveStructure archiveStructure 
Boolean reviewed = Boolean.FALSE 
TransactionStatus status=TransactionStatus.PENDING 
String notes 
Long sequence 
LetterTransaction relatedTransaction 

RelatedLetter relatedLetter 
List signs   = new ArrayList() 
List reviewLogs  = new ArrayList() 
List divisionPathes = new ArrayList() 
List targets = new ArrayList() 
String createdBy 
boolean deleted 

static transients = ['deleted'] 

static belongsTo = [letter:Letter] 
static hasMany = [ 
     targets:Party, 
     // related letters in case this letter is related to other letters (Attachments) 

     // actions have bean specified by organization manager التاشيرات 
     signs:Sign, 
     // all reviewing actions have bean taken for this letter 
     reviewLogs:ReviewLog, 
     // this devision path describes where scans have bean saved, according the ArchiveStructure for this letter 
     divisionPathes:DivisionPath 
] 

}

in controller

LetterTransaction sendTransactionInstance = LetterTransaction.get(params.long("transactionId")) 
    LetterTransaction receiveTransaction=new LetterTransaction() 
    receiveTransaction.action=ActionEnum.RECEIVE 
    receiveTransaction.letter=Letter.get(sendTransactionInstance.letter.id) 
    receiveTransaction.status=TransactionStatus.DONE 
    receiveTransaction.relatedTransaction=sendTransactionInstance 
    receiveTransaction.party=InternalDepartment.findByCoreId(session.departmentId) 
    receiveTransaction.dateTime=new Date() 
    receiveTransaction.sequence=params.long("sequence") 
    receiveTransaction.targets=[sendTransactionInstance?.party] 
    receiveTransaction.notes = params.comments 
    receiveTransaction.archiveStructure = ArchiveStructure.get(params.long("archiveStructure.id")) 

    if(!receiveTransaction.hasErrors() && receiveTransaction.save(flush: true,failOnError: true)){ 
     sendTransactionInstance.letter.addToTransactions(receiveTransaction) 
     sendTransactionInstance.letter.save(flush: true,failOnError: true) 
     //copy all scans to the new folder 
     manageService.copyLetterScansFromOrganization(sendTransactionInstance, sendTransactionInstance?.party?.coreId,null, getCurrentUser()) 
     render "OK" 
    }else{ 
     def errors=g.renderErrors(bean: receiveTransaction) 
     render errors 
    } 

Answer 1

不知道原因我通過在添加letterTransaction而不是保存receiveTransaction後保存letter實例來解決這個問題。這太奇怪了。