Number as null

Question

Dear Ivy Team.

We faced with the autounboxing problem. On UI side we have input field for number:
<pe:inputNumber value=#{data.num}/>
or <p:inputText value=#{data.num}>

On data model, the field 'num' has type Number. When a user saves data, then we get value 0 in this field. Can we store null value?

We read question:
http://answers.axonivy.com/questions/1674/auto-initialisation-number-0-from-jsf-view

We tried set COERCE_TO_ZERO=false in: \AxonIvyDesigner6.5.0.53277\webapps\ivy\WEB-INF\web.xml

<context-param>
<param-name>org.apache.el.parser.COERCE_TO_ZERO</param-name>
<param-value>false</param-value>
</context-param>

in %JAVA_OPTS%: -Dorg.apache.el.parser.COERCE_TO_ZERO=false
in process code, as: System.setProperty("org.apache.el.parser.COERCE_TO_ZERO", Boolean.FALSE.toString());

But it didn't help for us.
Could you correct us, what do we need do any more for Designer and then for Engine?

Where do we need set variable ivy.vm.additional.options?

Accepted Answer

Hi

of all you have to set the system property org.apache.el.parser.COERCE_TO_ZERO to false as described by you about. This can be done in the AxonIvyDesigner.ini of the AxonIvyEngine.ilc file on Windows. This turns of that JSF replaces null values through 0.
IvyScript tries to auto initialize most of the values. This means that if a number is null IvyScript will turn it into a 0. Even though you can test if a 0 is set manually or was auto initialized. This can be done with the operator is initialized.

Example:

ivy.log.info("Was initialized manually:"+(in.num is initialized) +" Value "+in.num);

With that you can decide if the field was empty (value is 0 but not initialized) or if the user has entered a 0 (value is 0 and initialized).

Regards

Reto Weiss, ivyTeam Support

Number as null

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