ArrayIndexOutOfBoundsException失败

Question

I have this simple controller which uploads a file into the database. I have a working view which displays the form for uploading, but when I click on the upload button, I run into this error at the documentInstance.save() line: ArrayIndexOutOfBoundsException occurred when processing request:[POST]/myApp/documentFile/upload

class DocumentController {
    def upload() {
        def file = request.getFile('file')
        if(file.empty) {
            flash.message = "File cannot be empty"
        } else {
            def documentInstance = new Document()
            documentInstance.filename = file.originalFilename
            documentInstance.filedata = file.getBytes()
            documentInstance.save()
        }
        redirect (action:'list')
    }
}

Can anyone help me understand where the problem lies? Is the information I have given sufficient for answering this? If not please let me know.

UPDATE:

form element part of the gsp is as below.

           <g:uploadForm action="upload">
                <fieldset class="form">
                    <input type="file" name="file" />
                </fieldset>
                <fieldset class="buttons">
                    <g:submitButton name="upload" class="save" value="Upload" />
                </fieldset>
            </g:uploadForm>

Here is the Document domain class

class Document{

    String filename
    byte[] fileData

    static constraints = {
        filename(blank:false,nullable:false)
        filedata(blank: true, nullable:true, maxSize:1073741824)
    }
}

Answer 1

Try setting 'size' or 'maxSize' constraints on your domain objects 'filedata' field according to the size of the files you are uploading. Your database might be creating small columns that cannot hold the file size you are uploading. According to http://grails.org/doc/latest/guide/theWebLayer.html#uploadingFiles