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app engine req.getParameter with type float [message #835042]

Mon, 02 April 2012 18:23

Natalia Molinero

Messages: 1
Registered: April 2012

Junior Member

Hi,

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I'm trying to do something very similar to the Guestbook which is in the App Engine tutorial (get started). However, I want to modified the types of the fields in the form. Eclipse doesn't show any error, but the server says:

HTTP ERROR 500 Problem accessing /. Reason:
java.lang.String cannot be cast to java.lang.Long

Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Long at org.datanucleus.store.appengine.TypeConversionUtils$1.apply(TypeConversionUtils.java:47) at org.datanucleus.store.appengine.TypeConversionUtils$1.apply(TypeConversionUtils.java:45) at org.datanucleus.store.appengine.TypeConversionUtils.datastoreValueToPojoValue(TypeConversionUtils.java:317) at org.datanucleus.store.appengine.DatastoreFieldManager.fetchObjectField

This is what I'm doing:

@Persistent private float weight; 
public Greeting (User author, String content, Date date, String weight) { this.author = author; 
this.content = content; 
this.date = date; 
this.weight = Float.parseFloat(weight); } 
public float getWeight() { 
return weight; }

I don't know where the error is...

Thank you in advance!!

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