我是完全陌生的。我有两个 Realm 类，一个问题与答案之间存在一对多的关系。
class Question {
String question
static hasMany = [answers: Answer]
static constraints = {
question blank: false
answers minSize: 1
}
}
和
class Answer {
String answer
static belongsTo = [question: Question]
static constraints = {
answer blank: false
}
}
控制者
@Transactional(readOnly = true)
class QuestionController {
static scaffold = Question
static allowedMethods = [save: "POST", update: "PUT", delete: "DELETE"]
def index() {
List < Question > questionList = Question.list()[questionList: questionList]
}
def show() {
[question: Question.get(params.id).question,
answers: Question.get(params.id).answers
]
}
def create() {
respond new Question(params)
}
@Transactional
def save(Question question) {
if (question == null) {
transactionStatus.setRollbackOnly()
notFound()
return
}
if (question.hasErrors()) {
transactionStatus.setRollbackOnly()
respond question.errors, view: 'create'
return
}
question.save flush: true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.created.message', args: [message(code: 'question.label',
default: 'Question'), question.id])
redirect question
}
'*' {
respond question, [status: CREATED]
}
}
}
def edit(Question question) {
respond question
}
@Transactional
def update(Question question) {
if (question == null) {
transactionStatus.setRollbackOnly()
notFound()
return
}
if (question.hasErrors()) {
transactionStatus.setRollbackOnly()
respond question.errors, view: 'edit'
return
}
question.save flush: true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.updated.message', args: [message(code: 'question.label',
default: 'Question'), question.id])
redirect question
}
'*' {
respond question, [status: OK]
}
}
}
@Transactional
def delete(Question question) {
if (question == null) {
transactionStatus.setRollbackOnly()
notFound()
return
}
question.delete flush: true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.deleted.message', args: [message(code: 'question.label',
default: 'Question'), question.id])
redirect action: "index", method: "GET"
}
'*' {
render status: NO_CONTENT
}
}
}
protected void notFound() {
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.not.found.message', args: [message(code: 'question.label',
default: 'Question'), params.id])
redirect action: "index", method: "GET"
}
'*' {
render status: NOT_FOUND
}
}
}
}现在，如果我要创建一个问题，答案将显示为/answer/create.gsp的链接，如下图所示
/question/create.gsp
我正在寻找的答案是在问题/create.gsp中显示为文本字段
/question/create.gsp的形式:
<g:form action="save">
<fieldset class="form">
<f:all bean="question"/>
</fieldset>
<fieldset class="buttons">
<g:submitButton name="create" class="save" value="${message(code: 'default.button.create.label', default: 'Create')}" />
</fieldset>
</g:form>我认为必须为我的表单提供其他解决方案，但我不知道。
提前致谢!
最佳答案
作为仅带演示部件的简单示例，请导航至/ question / myShow
问题/myShow.gsp:
<!DOCTYPE html>
<html>
<head>
<meta name="layout" content="main" />
</head>
<body>
<g:form>
<div class="fieldcontain required">
<label for="question">Question</label>
<g:textField name="question" value="${question.question}"/>
</div>
<div class="fieldcontain required">
<label for="question">Answers</label>
<g:each in="${question.answers}" var="ans" status="i">
<g:textField name="ans${i}" value="${ans.answer}"/>
</g:each>
</div>
</g:form>
</body>
</html>
问题 Controller :
def myShow() {
[question: Question.first()]
}
BootStrap.groovy
def q1 = new Question(question: 'what is 9 + 10?').save( failOnError: true )
new Answer( answer: '19', question: q1 ).save( failOnError: true )
关于grails - 正确显示hasMany关系，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44214729/