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Re: Problem with a form
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Re: Problem with a form


  • Subject: Re: Problem with a form
  • From: Chuck Hill <email@hidden>
  • Date: Thu, 28 Jun 2007 10:07:45 -0700


On Jun 28, 2007, at 9:11 AM, Sigurður E. Vilhelmsson wrote:

Thanks Chuck for your help.  One more tool in the toolbelt :)

The MIME type reported is application/octet-stream.  The field should
be empty, since I haven't selected a file right?

It might not be you. :-) WOFileUpload works in odd ways and Janine was trying to work around them. She may have missed this one.


A WOTextField will output its current content when the page is generated and update the content when the form is submitted. WOFileUpload works the same way, except that there is never any current content. When the form is submitted, if you have not uploaded a file it wipes out whatever it is bound to. application/ octet-stream is probably a default value when nothing is uploaded.

Does this happen with the unmodified code? I'd also mention this to Janine.

Chuck

2007/6/28, Chuck Hill <email@hidden>:
Add the lines below to see what is in mimeType.  That should help
track down the problem.


On Jun 28, 2007, at 5:00 AM, Sigurður E. Vilhelmsson wrote:

> Hi all,
>
> First, I'd like to thank everyone that chimed in on my WOPopUpButton
> problem last week. I believe I've got that covered, so on to the next
> one.
>
> I'm building on Janine Sisk's tutorial and have a problem with
> updating an entity through my form. What happens is that if I edit an
> entity already in the database, and leave the field BigFlag empty
> (i.e. update only currency or name), I get an error:
>
> The mimeType property of Country exceeds maximum length of 20
> characters
>
> So I figure something else than MimeType is getting passed to the
> mimeType field in my database. Any pointers on how to figure this out
> (i.e. how to see what gets passed) or something obviously wrong in my
> code below?
>
> Best regards,
> Sigurdur
>
>
> The java for my edit page (minus comments) is:
>
> package com.ninukot.pages;
>
> import com.ninukot.pages.DisplayOneCountry;
> import com.ninukot.eo.Country;
> import com.ninukot.eo.Currency;
> import com.webobjects.appserver.*;
> import com.webobjects.eoaccess.EOGeneralAdaptorException;
> import com.webobjects.eoaccess.EOUtilities;
> import com.webobjects.eocontrol.EOEditingContext;
> import com.webobjects.foundation.NSArray;
> import com.webobjects.foundation.NSData;
> import com.webobjects.foundation.NSTimestamp;
>
> public class AddEditCountry extends WOComponent {
>
> private Country country;
>
> public Currency currencyItem;
>
> public String imageFileName;
>
> private String errorMsg;
>
> public AddEditCountry(WOContext context) {
> super(context);
> }
>
> public NSArray allCurrency () {
> EOEditingContext ec = session ().defaultEditingContext();
> return EOUtilities.objectsForEntityNamed(ec, "Currency");
> }
>
> public Currency selectedCurrency() {
> return country.currency();
> }
>
> public void setSelectedCurrency(Currency aCurrency) {
> country.addObjectToBothSidesOfRelationshipWithKey (aCurrency,
> "currency");
> }
>
> public Country country() {
> if (country == null) {
>
> EOUtilities.createAndInsertInstance(session ().defaultEditingContext(),
> "Country");
> }
> return country;
> }
>
> public WOComponent saveChanges() {
> if (hasError()) {
> return context().page();
> }
>
> country().setLastModifiedDate(new NSTimestamp());
>
> try {
> session().defaultEditingContext ().saveChanges();
> } catch (ValidationException e) {
NSLog.out.appendln("MIME type in save changes: " + country().mimeType
());


> setErrorMsg(e.getMessage());
> } catch (EOGeneralAdaptorException e) {
> setErrorMsg(e.getMessage());
> }
>
> if (hasError()) {
> return context().page();
> } else {
> return goToDisplayOneCountry();
> }
> }
>
> public void validationFailedWithException(Throwable t, Object value,
> String keyPath) {
NSLog.out.appendln("MIME type from takeValues: " + value);
> setErrorMsg(t.getMessage());
> }
>
> public void setErrorMsg(String newMsg) {
> errorMsg = newMsg;
> }
>
> public String errorMsg() {
> return errorMsg;
> }
>
> public void setCountry (Country newCountry) {
> country = newCountry;
> }
>
> public NSData imageData() {
> return country.bigFlag();
> }
>
> public void setImageData(NSData imageData) {
> if (imageData.length() > 0) {
> country().validateTakeValueForKeyPath (imageData, "bigFlag");
> }
> }
>
> public boolean hasError() {
> return errorMsg() != null;
> }
>
> public boolean hasThumbnailFlag() {
> return country().thumbnailFlag() != null;
> }
>
> public void sleep() {
> setErrorMsg(null);
> super.sleep();
> }
>
> public DisplayOneCountry goToDisplayOneCountry() {
> DisplayOneCountry nextPage = (DisplayOneCountry)
> pageWithName("DisplayOneCountry");
> nextPage.setCountry(country);
> return nextPage;
> }
>
> }
>
> The html:
>
> <p>
> <webobject name="ShowThumbnail">
> Current image:<br />
> <webobject name="Thumbnail"></webobject>
> </webobject>
> </p>
>
> <webobject name="Form">
> <table>
> <tr><td>Nafn: <webobject name="Name"></webobject></td></tr>
> <tr><td>Höfuðborg: <webobject name="Capital"></webobject></td></tr>
> <tr><td>Fáni: <webobject name = "BigFlag"></webobject></td></tr>
> <tr><td>Mynt: <webobject name = "Currency"></webobject></td></tr>
> <tr><td><webobject name="SubmitButton"></webobject></td></tr>
> </table>
> </webobject>
> <webobject name="ShowErrors">
> <font color="red"><webobject name="Error"></webobject></font>
> </webobject>
> <p><webobject name="LinkToDisplayAllCountry">Back to the Index</
> webobject></p>
>
> and WOD:
> ShowErrors : WOConditional {
> condition = hasError;
> }
>
> Error : WOString {
> value = errorMsg;
> }
>
> Form : WOForm {
> enctype = "multipart/form-data";
> }
>
> Name : WOTextField {
> value = country.name;
> }
>
> Capital : WOText {
> value = country.capital;
> }
>
> BigFlag : WOFileUpload {
> mimeType = country.mimeType;
> data = imageData;
> filePath = imageFileName;
> }
>
> Currency : WOPopUpButton {
> list = allCurrency;
> item = currencyItem;
> displayString = currencyItem.currency;
> selection = selectedCurrency;
> }
>
> SubmitButton : WOSubmitButton {
> action = saveChanges;
> value = "Save Changes";
> }
>
> ShowThumbnail: WOConditional {
> condition = hasThumbnailFlag;
> }
>
> Thumbnail : WOImage {
> data = country.thumbnailFlag;
> mimeType = country.mimeType;
> }
>
> LinkToDisplayAllCountry : WOHyperlink {
> pageName = "DisplayAllCountry";
> }
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http://www.global-village.net/products/practical_webobjects






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  • Follow-Ups:
    • Re: Problem with a form
      • From: Janine Sisk <email@hidden>
References: 
 >Problem with a form (From: "Sigurður E. Vilhelmsson" <email@hidden>)
 >Re: Problem with a form (From: Chuck Hill <email@hidden>)
 >Re: Problem with a form (From: "Sigurður E. Vilhelmsson" <email@hidden>)

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