Bean editor model for User already contains a property model for property 'account'

[neo anderson]

I have an domain object named User, in which it has a field called `account'.
However, the User object only provide method getAccount(), but does not
provide method setAccount(String account). 

public class User{

    private String account;
    public User(... String account, ...){ ... this.account = account; }
    ...
    public String getAccount(){
        return this.account
    }
    public void setAccount(String account){
        this.account = account;
    }
    ...
}

In the page object e.g. Register, in which I build a BeanModel using
BeanModelSource.create(User.class, ...)

I notice that in the condition that the User object doesn't contain
setAccount(String) method. The web page diplay will throw an error if 

1.) in the Register page object, BeanModel does not use
`BeanModel.add("account",null).label("Account").sortable(false)' method to
create account field. 

Error: 
aused by: java.lang.RuntimeException: Bean editor model for User does not
contain a property named 'account'.  Available properties: address, name,
password, sex.
        at
org.apache.tapestry5.internal.beaneditor.BeanModelImpl.get(BeanModelImpl.java:152)
        at
org.apache.tapestry5.internal.beaneditor.BeanModelImpl.reorder(BeanModelImpl.java:213)
        at org.jecommerce.pages.Register.getRegisterModel(Register.java:75)
        at
$PropertyConduit_123e89435d6.get($PropertyConduit_123e89435d6.java)
        at
org.apache.tapestry5.internal.bindings.PropBinding.get(PropBinding.java:58)
        ... 91 more

2.) in the Register page object, BeanModel uses `BeanModel.add("account",
null).label("Account").sortable(false)' method to create account field. This
error will be thrown after clicking the beaneditform button Register (the
display of beaneditform for the html web page Register.tml is correctly
shown on the browser).

Error:
Caused by: java.lang.RuntimeException: Bean editor model for User already
contains a property model for property 'account'.
        at
org.apache.tapestry5.internal.beaneditor.BeanModelImpl.validateNewPropertyName(BeanModelImpl.java:87)
        at
org.apache.tapestry5.internal.beaneditor.BeanModelImpl.add(BeanModelImpl.java:128)
        at org.jecommerce.pages.Register.getRegisterModel(Register.java:74)
        at
$PropertyConduit_123e8863958.get($PropertyConduit_123e8863958.java)
        at
org.apache.tapestry5.internal.bindings.PropBinding.get(PropBinding.java:58)
        ... 74 more


The Register class code snippet:

        public BeanModel getRegisterModel(){
                model = beanModelSource.create(User.class, ...);
                model.exclude("page");
                model.add("account", null).label("Account").sortable(false); // 
unmarked
when  in condition 2, but marked in condition 1
                model.reorder("account", "password", "name", "sex", "address");
                return model;
        }

        public SelectModel getGenders(){
                return displayer.createGender();
        }

and Register.tml

        <t:beaneditform t:submitlabel="Register" t:object="user" t:remove="page"
t:model="registerModel">
                <t:parameter name="account">
                        <t:label for="Account"/> 
                        <t:textField t:id="account" t:model="user" 
t:value="user.account"
t:validate="required,regexp"/> 
                </t:parameter>
                <t:parameter name="name">
                        <t:label for="Name"/> 
                        <t:textField t:id="name" t:model="user" 
t:value="user.name"
t:validate="required,minlength=5"/> 
                </t:parameter>
                <t:parameter name="password">
                        <t:label for="Password"/> 
                        <t:passwordField t:id="password" t:model="user" 
t:value="user.password"
t:validate="required,minlength=2"/> 
                </t:parameter> 
                <t:parameter name="sex">
                        <t:label for="Sex"/> 
                        <t:select t:id="sex" t:model="genders" 
t:value="user.sex"
t:blankOption="never"/> 
                </t:parameter> 
                
        </t:beaneditform>

What is the correct way to add a column that the User object doesn't provide
get/set method at the same time? Or the only way to display the field e.g
account using BeanModel is to provide both get/set method in the domain
object e.g. User?

Thanks for the help.



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