[英]Grails : Error saving object, hard to understand, don't use 'property' keyword
我得到这样的域类:
class Offer {
Property property
Building building
ExternalSystem externalSystem
OfferStatus status
Double offerPrice
String currency
String description
String adventages
Date offerDisponibility
OfferNature offerNature
Surfaces surfaces
static hasMany = [units: Unit]
static constraints = {
building nullable: true
externalSystem nullable: true
description nullable: true
adventages nullable: true
}
}
将其填充到控制器中时:
def offer = new Offer()
offer.property = Property.get(1)
offer.building = Building.get(1)
offer.externalSystem = ExternalSystem.get(1)
offer.status = OfferStatus.get(1)
offer.offerPrice = 26860
offer.currency = 'EUR'
offer.description = 'WONDERFULL OFFER !'
offer.offerDisponibility = convertDate('12/04/2014')
offer.offerNature = OfferNature.read(1)
offer.surfaces = Surfaces.get(2)
offer.validate()
在验证,保存或对此对象进行任何操作时,我会遇到奇怪的行为。 它是唯一这样做的域对象域。
我得到了两个不同的堆栈跟踪,这是我问题中最奇怪的部分,第一次是在我第一次调用控制器时的第一个堆栈跟踪:
| Error 2013-11-26 11:27:10,971 [http-bio-8080-exec-2] ERROR errors.GrailsExceptionResolver - ArrayIndexOutOfBoundsException occurred when processing
request: [GET] /Project/login/auth
0. Stacktrace follows:
Message: 0
Line | Method
->> 116 | doCall in com.project.security.LoginController$_closure1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 200 | doFilter in grails.plugin.cache.web.filter.PageFragmentCachingFilter
| 63 | doFilter in grails.plugin.cache.web.filter.AbstractFilter
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run in java.lang.Thread
第二个是最后一个堆栈跟踪:
| Error 2013-11-26 11:01:43,704 [http-bio-8080-exec-3] ERROR [/Project].[default] - Servlet.service() for servlet [default] in context with path [/Project] threw exception [org.springframework.web.util.NestedServletException: Request processing failed; nested exception is groovy.lang.MissingMethodException: No signature of method: static java.lang.Math.max() is applicable for argument types: (java.lang.Integer, null) values: [4, null]
Possible solutions: max(int, int), max(double, double), max(float, float), max(long, long), min(int, int), wait()] with root cause
Message: No signature of method: static java.lang.Math.max() is applicable for argument types: (java.lang.Integer, null) values: [4, null]
Possible solutions: max(int, int), max(double, double), max(float, float), max(long, long), min(int, int), wait()
Line | Method
->> 251 | doAppend in org.apache.log4j.AppenderSkeleton
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 66 | appendLoopOnAppenders in org.apache.log4j.helpers.AppenderAttachableImpl
| 206 | callAppenders . . . . in org.apache.log4j.Category
| 391 | forcedLog in ''
| 856 | log . . . . . . . . . in ''
| 192 | logMessage in org.slf4j.impl.GrailsLog4jLoggerAdapter
| 167 | error . . . . . . . . in ''
| 213 | error in org.apache.commons.logging.impl.SLF4JLog
| 200 | doFilter . . . . . . in grails.plugin.cache.web.filter.PageFragmentCachingFilter
| 63 | doFilter in grails.plugin.cache.web.filter.AbstractFilter
| 1145 | runWorker . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 615 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run . . . . . . . . . in java.lang.Thread
那堆栈跟踪是正确的?
我怎么解决这个问题?
如果我没有调用save()或validate()消息,则没有堆栈跟踪。
添加failOnError:true并未更改堆栈跟踪。
制造 :
if (!offer.save()) {
log.error offer.errors
}
没有改变堆栈跟踪。
谢谢阅读,
施奈特
经过几个小时的研究,我终于解决了我的问题。
Property myProperty
不知道为什么,但'property'作为变量名(而不是域类名)似乎是一个保留关键字...
希望它会有用。
我发现了什么是错的,什么是阻塞的。
好的,编辑我的类,我发现这是抽象类的问题。
记住我的Offer课程:
class Offer {
// Property property
Building building
ExternalSystem externalSystem
OfferStatus status
Double offerPrice
String currency
String description
String adventages
Date offerDisponibility
OfferNature offerNature
Surfaces surfaces
static hasMany = [units: Unit]
static constraints = {
building nullable: true
externalSystem nullable: true
description nullable: true
adventages nullable: true
}
}
注释掉(上面类的成员变量)属性解决了我的问题。
这是我的Property类:
class Property extends Content {
AssetManager assetManager
Owner owner
Mandat mandat
AddressContent addressContent
static hasMany = [
buildings: Building,
propertyMandats: PropertyMandat
]
static constraints = {
assetManager nullable: true
mandat nullable: true
owner nullable: true
}
}
这是我的Content类:
abstract class Content {
String name
ExternalSystem externalSystem
static constraints = {
name nullable: true
externalSystem nullable: true
}
@Override
public String toString() { name }
}
Hibernate不会生成任何“属性”表,但是'content'表就像desc之后的那样:
+---------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------------+--------------+------+-----+---------+----------------+
| id | bigint(20) | NO | PRI | NULL | auto_increment |
| version | bigint(20) | NO | | NULL | |
| external_system_id | bigint(20) | YES | MUL | NULL | |
| name | varchar(255) | YES | | NULL | |
| class | varchar(255) | NO | | NULL | |
| sys_admin_client_id | bigint(20) | YES | MUL | NULL | |
| is_public_offer | bit(1) | YES | | NULL | |
| public_offer | varchar(255) | YES | | NULL | |
| fund_id | bigint(20) | YES | MUL | NULL | |
| address_content_id | bigint(20) | YES | MUL | NULL | |
| asset_manager_id | bigint(20) | YES | MUL | NULL | |
| mandat_id | bigint(20) | YES | MUL | NULL | |
| owner_id | bigint(20) | YES | MUL | NULL | |
| last_name | varchar(255) | YES | | NULL | |
| mail | varchar(255) | YES | | NULL | |
| phone_number1 | varchar(255) | YES | | NULL | |
| phone_number2 | varchar(255) | YES | | NULL | |
| agency_id | bigint(20) | YES | MUL | NULL | |
| begin_date | datetime | YES | | NULL | |
| client_owner_id | bigint(20) | YES | MUL | NULL | |
| end_date | datetime | YES | | NULL | |
| mandat_number | varchar(255) | YES | | NULL | |
+---------------------+--------------+------+-----+---------+----------------+
我的Content类扩展了很多类。
所以,我想问题是关于没有创建'property'表的事实。
为什么会这样? 我的内容抽象类是错误的吗?
关于您对content
表的问题,
“在数据库级别,Grails默认使用table-per-hierarchy
映射和一个名为class
的鉴别器列,因此父类(Content)及其子类(BlogEntry,Book等)共享同一个表。”
Grails框架 - 参考文档-7.2.3 GORM中的继承
希望这可以帮助。
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