I am trying to upload a picture, and save it in database.
If I do the following I get this error:
Failed to convert property value of type
org.springframework.web.multipart.commons.CommonsMultipartFile to
required type java.lang.Byte[] for property picture1; nested exception
is java.lang.IllegalArgumentException: Cannot convert value of type
[org.springframework.web.multipart.commons.CommonsMultipartFile] to
required type [java.lang.Byte] for property picture1[0]:
PropertyEditor
[org.springframework.beans.propertyeditors.CustomNumberEditor]
returned inappropriate value
If i do it this way:
if(request instanceof MultipartHttpServletRequest){
MultipartHttpServletRequest mpr = (MultipartHttpServletRequest)request;
CommonsMultipartFile f = (CommonsMultipartFile) mpr.getFile("picture1");
}
I get this error:
Executing action [save] of controller [com.testapp.RequestController]
caused exception: Cannot cast object ‘
org.springframework.web.multipart.commons.CommonsMultipartFile@34ae1f02’
with class
‘org.springframework.web.multipart.commons.CommonsMultipartFile’ to
class ‘java.lang.Byte’
What should I do to make this work?
Domain
package com.testapp
class Request{
String requestID
Date dateCreated
String subject
String startedBy
String description
String status
String priority
Productline productline
Topic topic
Subtopic subtopic
String company
Byte [] picture1
Byte [] picture2
Byte [] picture3
String acceptedBy
static constraints = {
requestID(blank:true,nullable:true)
dateCreated(blank:true,nullable:true)
subject()
description(maxSize:5000)
status (blank:true,nullable:true)
priority(inList:["Normal","Urgent","Not urgent"])
productline(blank:true,nullable:true)
topic(blank:true,nullable:true)
subtopic(blank:true,nullable:true)
company(blank:true,nullable:true)
startedBy(blank:true,nullable:true)
acceptedBy(blank:true,nullable:true)
picture1(blank:true,nullable:true)
picture2(blank:true,nullable:true)
picture3(blank:true,nullable:true)
}
}
GSP:
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="layout" content="main" />
<g:set var="entityName" value="${message(code: 'request.label', default: 'Request')}" />
<title><g:message code="New request" args="[entityName]" /></title>
</head>
<body>
<div class="nav">
<span class="menuButton"><a class="home" href="${createLink(uri: '/')}"><g:message `code="default.home.label"/></a></span>`
<span class="menuButton"><g:link class="list" action="userList"><g:message code="Lista zahteva" `args="[entityName]" /></g:link></span>`
</div>
<div class="body">
<h1><g:message code="New request" args="[entityName]" /></h1>
<g:if test="${flash.message}">
<div class="message">${flash.message}</div>
</g:if>
<g:hasErrors bean="${requestInstance}">
<div class="errors">
<g:renderErrors bean="${requestInstance}" as="list" />
</div>
</g:hasErrors>
<g:form action="save" method="post" enctype="multipart/form-data">
<div class="dialog">
<table>
<tbody>
<tr class="prop">
<td valign="top" class="name">
<label for="subject"><g:message code="request.subject.label" default="Subject" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'subject', 'errors')}">
<g:textField name="subject" value="${requestInstance?.subject}" />
</td>
</tr>
<tr class="prop">
<td valign="top" class="name">
<label for="description"><g:message code="request.description.label" default="Opis" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'description', 'errors')}">
<g:textArea name="description" cols="40" rows="5" value="${requestInstance?.description}" />
</td>
</tr>
<tr>
<td valign="top" class="name">
<label for="picture1"><g:message code="request.picture1.label" default="Printscreen" /></label>
</td>
<td valign="top" class="value">
<input type="file" id="picture1" name="picture1"/>
</td>
</tr>
<tr class="prop">
<td valign="top" class="name">
<label for="priority"><g:message code="request.priority.label" default="Priority" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'status', 'errors')}">
<g:select name="priority" from="${requestInstance.constraints.priority.inList}" value="${requestInstance?.priority}" valueMessagePrefix="request.priority" />
</td>
</tr>
<tr class="prop">
<td valign="top" class="name">
<label for="productline"><g:message code="request.productline.label" default="Productline" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'productline', 'errors')}">
<g:select name="productline.id" from="${com.testapp.Productline.list()}" optionKey="id" value="${requestInstance?.productline?.id}" />
</td>
</tr>
<tr class="prop">
<td valign="top" class="name">
<label for="topic"><g:message code="request.topic.label" default="Topic" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'topic', 'errors')}">
<g:select name="topic.id" from="${com.testapp.Topic.list()}" optionKey="id" value="${requestInstance?.topic?.id}" />
</td>
</tr>
<tr class="prop">
<td valign="top" class="name">
<label for="subtopic"><g:message code="request.subtopic.label" default="Subtopic" /></label>
</td>
<td valign="top" class="value ${hasErrors(bean: requestInstance, field: 'subtopic', 'errors')}">
<g:select name="subtopic.id" from="${com.testapp.Subtopic.list()}" optionKey="id" value="${requestInstance?.subtopic?.id}" />
</td>
</tr>
</tbody>
</table>
</div>
<div class="buttons">
<span class="button"><g:submitButton name="create" class="save" value="${message(code: 'default.button.create.label', default: 'Create')}" /></span>
</div>
</g:form>
</div>
</body>
Controller:
def save = {
def requestInstance = new Request(params)
def requestNumberInstance = new RequestNumber()
def upPic1 = request.getFile('picture1')
def lastReqNum = RequestNumber.find("from RequestNumber ORDER BY requestNumber desc")
if(lastReqNum){
requestNumberInstance.requestNumber = lastReqNum.requestNumber + 1
}
else{
requestNumberInstance.requestNumber = 110000
}
requestInstance.requestID = "CSC" + requestNumberInstance.requestNumber
def currentUserContact = Contact.findByUser(springSecurityService.getCurrentUser())
requestInstance.startedBy = currentUserContact.realname
requestInstance.company = currentUserContact.company
requestInstance.status = "Opened"
requestInstance.acceptedBy = "Not yet accepted"
requestInstance.picture1 = upPic1
if(requestNumberInstance.save()){
if (requestInstance.save()) {
flash.message = "${message(code: 'default.created.message', args: [message(code: 'request.label', default: 'Request'), requestInstance.id])}"
redirect(action: "show", id: requestInstance.id)
}
else {
render(view: "create", model: [requestInstance: requestInstance])
}
}
else{
render(view: "create", model: [requestInstance: requestInstance])
}
}
Please dont mind the spaghetti code. I’m just trying to get some basic concepts. I will clear it later.
Simplified example:
def save = {
def requestInstance = new Request(params)
def requestNumberInstance = new RequestNumber()
if(requestInstance.validate() && requestInstance.save(flush: true)){
println "Saved successfully with ${requestInstance.picture1.length} bytes"
}
else {
println "Save failed"
}
It only worked when I changed my domain properties picture1,picture2,picture3 to:
and added those mappings: