我有一个多对一的关系，我想通过一个表单公开，但我无法让级联保存工作，我在日志中看不到任何错误/异常。这是域类:
class Person {
String name
List reminders = new ArrayList()
static hasMany = [ reminders : PEvent ]
static mapping = { reminders cascade:"all-delete-orphan" }
def getRemindersList() {
return LazyList.decorate(eventos, FactoryUtils.instantiateFactory(PEvent .class))
}
}
class PEvent implements Comparable {
static belongsTo = [person:Person ]
static transients = [ '_deleted' ]
String eventType
Date eventDate
String comments
boolean _deleted
int compareTo(Object other) {
eventType <=> other.eventType ?: eventDate <=> other.eventDate ?: comments <=> other.comments
}
}
以下是我在表单中引用提醒的方式:
<div class="fieldcontain ${hasErrors(bean: personInstance, field: 'reminders', 'error')} required">
<label for="reminders">
<g:message code="person.reminders.label" default="Reminders" />
<span class="required-indicator">*</span>
</label>
<div id="childList">
<g:Each var="reminder" in="${personInstance.reminders}" status="i">
<div id="reminder${i}">
<g:select name="remindersList[${i}].eventType" from="${reminder?.constraints?.eventType?.inList}" required="" value="${reminder?.eventType}" />
<g:datePicker name="remindersList[${i}].eventDate" precision="day" value="${reminder?.eventDate}" />
<g:textField name="remindersList[${i}].comments" required="" value="${reminder?.comments}"/>
<input type="hidden" name='remindersList[${i}]._deleted' id='remindersList[${i}]._deleted' value='false'/>
</div>
</g:each>
</div>
</div>
部分跟踪显示持续存在的内容。在开始时，我正在记录从表单中捕获的内容，到目前为止一切正常，但是当 Person 被保存时，提醒集合似乎是空的。
2015-07-13 12:22:13,469 [http-bio-8080-exec-10] DEBUG rescate.personService - par: remindersList[0].comments=jon5com
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0]=[eventType:nacimiento, eventDate:date.struct, eventDate_day:13, eventDate_month:7, eventDate_year:2015, comments:jon5com, _deleted:false]
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: daten_month=7
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: datein_year=2015
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0].eventType=nacimiento
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0]._deleted=false
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: daten_year=2015
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: dist=crt
2015-07-13 12:22:13,470 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0].eventDate_day=13
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: create=Create
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0].eventDate_year=2015
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: datein_day=13
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: name=jon5
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: loop=cm
2015-07-13 12:22:13,472 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: datein=date.struct
2015-07-13 12:22:13,473 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: gnd=m
2015-07-13 12:22:13,473 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: tim=1m
2015-07-13 12:22:13,473 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: dateOfIntake_month=7
2015-07-13 12:22:13,473 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0].eventDate_month=7
2015-07-13 12:22:13,474 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: dateNeutered_day=13
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: remindersList[0].eventDate=date.struct
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: dateNeutered=date.struct
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: spc=notes2
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: action=save
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: format=null
2015-07-13 12:22:13,475 [http-bio-8080-exec-10] DEBUG rescate.PersonService - par: controller=person
2015-07-13 12:22:13,615 [http-bio-8080-exec-10] TRACE internal.SessionImpl - Setting flush mode to: MANUAL
2015-07-13 12:22:13,616 [http-bio-8080-exec-10] TRACE internal.SessionImpl - Setting flush mode to: AUTO
2015-07-13 12:22:13,616 [http-bio-8080-exec-10] DEBUG hibernate.GrailsHibernateTemplate - Found thread-bound Session for HibernateTemplate
2015-07-13 12:22:13,617 [http-bio-8080-exec-10] TRACE internal.SessionImpl - Setting flush mode to: MANUAL
2015-07-13 12:22:13,617 [http-bio-8080-exec-10] TRACE internal.AbstractSaveEventListener - Transient instance of: org.ppl.Person
2015-07-13 12:22:13,617 [http-bio-8080-exec-10] TRACE internal.DefaultSaveOrUpdateEventListener - Saving transient instance
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE internal.AbstractSaveEventListener - Saving [org.ppl.Person#<null>]
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE internal.Cascade - Processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE internal.Cascade - Done processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE internal.Versioning - Seeding: 0
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE spi.ActionQueue - Adding an EntityIdentityInsertAction for [org.ppl.Person] object
2015-07-13 12:22:13,618 [http-bio-8080-exec-10] TRACE spi.ActionQueue - Executing inserts before finding non-nullable transient entities for early insert: [EntityIdentityInsertAction[org.ppl.Person#<null>]]
2015-07-13 12:22:13,619 [http-bio-8080-exec-10] TRACE spi.ActionQueue - Adding insert with no non-nullable, transient entities: [EntityIdentityInsertAction[org.ppl.Person#<null>]]
2015-07-13 12:22:13,619 [http-bio-8080-exec-10] TRACE spi.ActionQueue - Executing insertions before resolved early-insert
2015-07-13 12:22:13,619 [http-bio-8080-exec-10] DEBUG spi.ActionQueue - Executing identity-insert immediately
2015-07-13 12:22:13,619 [http-bio-8080-exec-10] TRACE internal.SessionImpl - Setting flush mode to: MANUAL
2015-07-13 12:22:13,621 [http-bio-8080-exec-10] TRACE entity.AbstractEntityPersister - Inserting entity: org.ppl.Person (native id)
2015-07-13 12:22:13,621 [http-bio-8080-exec-10] TRACE entity.AbstractEntityPersister - Version: 0
2015-07-13 12:22:13,622 [http-bio-8080-exec-10] DEBUG hibernate.SQL - insert into animal (id, version, Gnd, daten, datein, tim, spc, name, dist, loop) values (null, ?, ?, ?, ?, ?, ?, ?, ?, ?)
2015-07-13 12:22:13,623 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Registering statement [prep38: insert into animal (id, version, Gnd, daten, datein, edad, spc, name, dist, loop) values (null, ?, ?, ?, ?, ?, ?, ?, ?, ?)]
2015-07-13 12:22:13,623 [http-bio-8080-exec-10] TRACE entity.AbstractEntityPersister - Dehydrating entity: [org.ppl.Person#<null>]
2015-07-13 12:22:13,624 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [1] as [BIGINT] - [0]
2015-07-13 12:22:13,624 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [2] as [VARCHAR] - [Male]
2015-07-13 12:22:13,624 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [3] as [TIMESTAMP] - [Mon Jul 13 00:00:00 ART 2015]
2015-07-13 12:22:13,624 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [4] as [TIMESTAMP] - [Mon Jul 13 00:00:00 ART 2015]
2015-07-13 12:22:13,626 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [5] as [VARCHAR] - [1m]
2015-07-13 12:22:13,626 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [6] as [VARCHAR] - [notes2]
2015-07-13 12:22:13,626 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [7] as [VARCHAR] - [jon5]
2015-07-13 12:22:13,627 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [8] as [VARCHAR] - [crt]
2015-07-13 12:22:13,627 [http-bio-8080-exec-10] TRACE sql.BasicBinder - binding parameter [9] as [VARCHAR] - [cm]
2015-07-13 12:22:13,628 [http-bio-8080-exec-10] DEBUG id.IdentifierGeneratorHelper - Natively generated identity: 2
2015-07-13 12:22:13,628 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Releasing result set [rs42: org.h2.result.LocalResult@2a3ba9ee columns: 1 rows: 1 pos: 0]
2015-07-13 12:22:13,628 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Closing result set [rs42: org.h2.result.LocalResult@2a3ba9ee columns: 1 rows: 1 pos: 0]
2015-07-13 12:22:13,631 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Releasing statement [prep38: insert into animal (id, version, Gnd, daten, datein, tim, spc, name, dist, loop) values (null, ?, ?, ?, ?, ?, ?, ?, ?, ?) {1: 0, 2: 'Male', 3: TIMESTAMP '2015-07-13 00:00:00.0', 4: TIMESTAMP '2015-07-13 00:00:00.0', 5: '1m', 6: 'notes2', 7: 'jon5', 8: 'crt', 9: 'cm'}]
2015-07-13 12:22:13,631 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Closing prepared statement [prep38: insert into animal (id, version, Gnd, daten, datein, tim, spc, name, dist, loop) values (null, ?, ?, ?, ?, ?, ?, ?, ?, ?) {1: 0, 2: 'Male', 3: TIMESTAMP '2015-07-13 00:00:00.0', 4: TIMESTAMP '2015-07-13 00:00:00.0', 5: '1m', 6: 'notes2', 7: 'jon5', 8: 'crt', 9: 'cm'}]
2015-07-13 12:22:13,631 [http-bio-8080-exec-10] TRACE internal.JdbcCoordinatorImpl - Starting after statement execution processing [ON_CLOSE]
2015-07-13 12:22:13,632 [http-bio-8080-exec-10] TRACE internal.UnresolvedEntityInsertActions - No unresolved entity inserts that depended on [[org.ppl.Person#2]]
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.Cascade - Processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.Cascade - Cascade ACTION_SAVE_UPDATE for collection: org.ppl.Person.reminders
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.Cascade - Done cascade ACTION_SAVE_UPDATE for collection: org.ppl.Person.reminders
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.Cascade - Done processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.AbstractSaveEventListener - Persistent instance of: org.ppl.Person
2015-07-13 12:22:13,633 [http-bio-8080-exec-10] TRACE internal.DefaultSaveOrUpdateEventListener - Ignoring persistent instance
2015-07-13 12:22:13,634 [http-bio-8080-exec-10] TRACE internal.DefaultSaveOrUpdateEventListener - Object already associated with session: [org.ppl.Person#2]
2015-07-13 12:22:13,634 [http-bio-8080-exec-10] TRACE internal.UnresolvedEntityInsertActions - No entity insert actions have non-nullable, transient entity dependencies.
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.AbstractFlushingEventListener - Flushing session
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] DEBUG internal.AbstractFlushingEventListener - Processing flush-time cascades
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.Cascade - Processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.Cascade - Cascade ACTION_SAVE_UPDATE for collection: org.ppl.Person.reminders
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.Cascade - Done cascade ACTION_SAVE_UPDATE for collection: org.ppl.Person.reminders
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.Cascade - Done processing cascade ACTION_SAVE_UPDATE for: org.ppl.Person
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] DEBUG internal.AbstractFlushingEventListener - Dirty checking collections
2015-07-13 12:22:13,635 [http-bio-8080-exec-10] TRACE internal.AbstractFlushingEventListener - Flushing entities and processing referenced collections
2015-07-13 12:22:13,636 [http-bio-8080-exec-10] TRACE internal.WrapVisitor - Wrapped collection in role: org.ppl.Person.reminders
2015-07-13 12:22:13,636 [http-bio-8080-exec-10] DEBUG internal.Collections - Collection found: [org.ppl.Person.reminders#2], was: [<unreferenced>] (initialized)
2015-07-13 12:22:13,636 [http-bio-8080-exec-10] TRACE internal.AbstractFlushingEventListener - Processing unreferenced collections
2015-07-13 12:22:13,636 [http-bio-8080-exec-10] TRACE internal.AbstractFlushingEventListener - Scheduling collection removes/(re)creates/updates
2015-07-13 12:22:13,637 [http-bio-8080-exec-10] DEBUG internal.AbstractFlushingEventListener - Flushed: 0 insertions, 0 updates, 0 deletions to 1 objects
2015-07-13 12:22:13,637 [http-bio-8080-exec-10] DEBUG internal.AbstractFlushingEventListener - Flushed: 1 (re)creations, 0 updates, 0 removals to 1 collections
2015-07-13 12:22:13,637 [http-bio-8080-exec-10] DEBUG util.EntityPrinter - Listing entities:
2015-07-13 12:22:13,637 [http-bio-8080-exec-10] DEBUG util.EntityPrinter - org.ppl.Person{loop=cm, name=jon5, id=2, imagenes=null, datein=Mon Jul 13 00:00:00 ART 2015, Gnd=Male, tim=1m, dist=crt, reminders=[], daten=Mon Jul 13 00:00:00 ART 2015, spc=notes2, version=0}
2015-07-13 12:22:13,638 [http-bio-8080-exec-10] TRACE internal.AbstractFlushingEventListener - Executing flush
2015-07-13 12:22:13,638 [http-bio-8080-exec-10] DEBUG collection.AbstractCollectionPersister - Inserting collection: [org.ppl.Person.reminders#2]
2015-07-13 12:22:13,639 [http-bio-8080-exec-10] DEBUG collection.AbstractCollectionPersister - Collection was empty
任何线索都将受到欢迎。
最佳答案
我发现了这个问题。我正在关注一个示例( http://www.2paths.com/2009/10/01/one-to-many-relationships-in-grails-forms/ )，其中通过 getter 访问 LazyList，并且表单字段将引用此“可扩展”列表。嗯，这就是问题所在，表单字段显然需要具有域的集合列表，因此 grails 可以执行数据绑定(bind)。我的方法:为了向表单添加新字段，我使用 ajax 在 Controller 中调用操作，获取一个新子项并使用它呈现模板，然后在表单中将模板附加到子项列表中。
至于创作，我只是依靠grails数据绑定(bind)。
我仍然不确定上面 2paths 的示例中的 WHY 或 HOW 是通过可扩展列表完成的。
class Author {
static constraints = { }
String name
List books = new ArrayList()
static hasMany = [ books:Book ]
static mapping = {
books cascade:"all-delete-orphan"
}
def getExpandableBookList() {
return lazyList.decorate(books,FactoryUtils.instantiateFactory(Book.class))
}
}
关于Grails 无法从表单中级联保存多对一，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31389324/