2
我無法爲Grails使用JodaTime插件。該插件似乎正確地轉換爲JSON的輸出，但似乎無法再接受輸出的日期格式作爲輸入時，當相同的JSON對象被送回。Grails無法將日期/時間從JSON解析回約達日期時間
這些是我得到的錯誤：
Field error in object 'server.Session' on field 'lastUpdated': rejected value [2011-12-19T14:15:03-06:00]; codes [typeMismatch.server.Session.lastUpdated,typeMismatch.lastUpdated,typeMismatch.org.joda.time.DateTime,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [server.Session.lastUpdated,lastUpdated]; arguments []; default message [lastUpdated]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'org.joda.time.DateTime' for property 'lastUpdated'; nested exception is java.lang.IllegalArgumentException: Invalid format: "2011-12-19T14:15:03-06:00" is malformed at "11-12-19T14:15:03-06:00"]
Field error in object 'server.Session' on field 'dateCreated': rejected value [2011-12-19T14:15:03-06:00]; codes [typeMismatch.server.Session.dateCreated,typeMismatch.dateCreated,typeMismatch.org.joda.time.DateTime,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [server.Session.dateCreated,dateCreated]; arguments []; default message [dateCreated]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'org.joda.time.DateTime' for property 'dateCreated'; nested exception is java.lang.IllegalArgumentException: Invalid format: "2011-12-19T14:15:03-06:00" is malformed at "11-12-19T14:15:03-06:00"] id=33 version=0>
這裏是非常基本的域模型：
package server
import org.joda.time.DateTime
class Session {
DateTime dateCreated
DateTime lastUpdated
String ip
static constraints = {
ip blank: false
}
}
這裏是展示和更新方法（分別發送和接收JSON）：
def show() {
def sessionInstance = Session.get(params.id)
if (!sessionInstance) {
flash.message = message(code: 'default.not.found.message', args: [message(code: 'session.label', default: 'Session'), params.id])
redirect(action: "list")
return
}
def response = [sessionInstance: sessionInstance]
withFormat {
html response
json {render response as JSON}
xml {render response as XML}
}
}
def update() {
def sessionInstance = Session.get(params.id)
if (!sessionInstance) {
flash.message = message(code: 'default.not.found.message', args: [message(code: 'session.label', default: 'Session'), params.id])
redirect(action: "list")
return
}
if (params.version) {
def version = params.version.toLong()
if (sessionInstance.version > version) {
sessionInstance.errors.rejectValue("version", "default.optimistic.locking.failure",
[message(code: 'session.label', default: 'Session')] as Object[],
"Another user has updated this Session while you were editing")
render(view: "edit", model: [sessionInstance: sessionInstance])
return
}
}
sessionInstance.properties = params // <----- This is what causes the errors
log.info("instance: ${sessionInstance.dump()}") // <------ This is where I'm seeing the error messages
if (!sessionInstance.save(flush: true)) {
render(view: "edit", model: [sessionInstance: sessionInstance])
return
}
flash.message = message(code: 'default.updated.message', args: [message(code: 'session.label', default: 'Session'), sessionInstance.id])
redirect(action: "show", id: sessionInstance.id)
}
我不知道我需要做什麼來糾正這個問題，或者即使我正確地做事，因爲我對Grails很陌生。在所有現實中，導致問題的兩個日期字段應該由GORM在內部100％處理，並且我寧願控制器完全忽略它們，但是會有其他類似的日期字段，當域模型獲取時需要更新填入。
我怎樣才能得到自動的JSON反編組，正確地轉換回喬達時間DateTime對象？
注意：這是目前客戶端 - 服務器應用程序的概念驗證。