Groovy/Grails对我来说更多新手问题。尝试将域类序列化为JSON时出现Grails堆栈溢出错误
的Groovy版本2.4.8版本的Grails 2.5.1
我曾尝试多种方式来序列化我的领域类的一个实例或域类的实例的ArrayList。
当试图序列化单个实例时,出现堆栈溢出错误。
代码和堆栈跟踪如下所示
def getAdvisors(String keystrokes, String firm) {
def advisors = priceBlotterService.advisorsForKeystrokes(keystrokes, "", 30)
def a1 = advisors[0]
def json = JsonOutput.toJson(a1)
}
Caused by InvocationTargetException: null
->> 198 | 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
^ 745 | run . . . in java.lang.Thread
Caused by StackOverflowError: null
->> 100 | invoke in org.codehaus.groovy.reflection.CachedMethod
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 62 | getProperty in groovy.lang.MetaBeanProperty
| 42 | getValue in groovy.lang.PropertyValue
| 388 | getProperties in org.codehaus.groovy.runtime.DefaultGroovyMethods
| 290 | writeObject in groovy.json.JsonOutput
| 329 | writeArray in ''
| 286 | writeObject in ''
| 424 | writeMap in ''
| 294 | writeObject in ''
| 329 | writeArray in ''
| 286 | writeObject in ''
| 424 | writeMap in ''
顾问,案例,与企业类:
class Advisor {
String firstName
String lastName
String fullName
String city
String state
Firm firm
static belongsTo = [Case, Firm]
static hasMany = [cases:Case]
static constraints = {
}
}
class Case {
String caseCode
String internalComment
String externalComment
Date dateCreated
String createdBy
Date dateUpdated
String updatedBy
static belongsTo = [owner:User, caseStatusType:CaseStatusType]
static hasMany = [advisor:Advisor]
static mapping = {
dateCreated sqlType: "date"
dateUpdated sqlType: "date"
}
static constraints = {
dateCreated(nullabe: false)
dateUpdated(nullable: false)
}
}
class Firm {
String name
static constraints = {
}
}
编辑:
我发现了一个根本性的问题,我的领域类/表格可能与此有关,需要解决。
我试图做一个简单的从用户表获得,我得到一个错误消息,指出没有ID字段。很难弄清楚发生了什么。一些细节如下。
行代码
User[] users = User.findAll()
错误消息
org.springframework.jdbc.BadSqlGrammarException: Hibernate operation: could not extract ResultSet; bad SQL grammar [n/a]; nested exception is org.postgresql.util.PSQLException: ERROR: column this_.id does not exist Position: 8
用户类
class User {
String firstName
String lastName
static constraints = {
}
}
DDL对于用户表
CREATE TABLE "user"
(
id BIGINT DEFAULT nextval('user_id_seq'::regclass) PRIMARY KEY NOT NULL,
first_name VARCHAR(30),
last_name VARCHAR(30),
version BIGINT
);
CREATE UNIQUE INDEX user_id_uindex ON "user" (id);
编辑:
具有用户表/类的固定发行者。用户是Postresql中的关键字,因此我只是将其重构为EndUser。
你可以发布您的案例与企业类的细节? – LeslieV
@LeslieV Ok补充说,谢谢! – NewDev