try
<t:eventlink t:event="changeRelation" t:async="true"
t:context="list:account.get('test').userUuid, friend"> Change Relation
</t:eventlink>
square brackets doesn't work for me either. not sure why list: is not
documented.
cheers,
Cyndy
________________________________________
From: D. R. [d.re...@googlemail.com.INVALID]
Sent: Tuesday, October 02, 2018 10:48 AM
To: users@tapestry.apache.org
Subject: eventlink with multiple context parameters
Hi @all,
I am confused about calling a java method with an eventlink and multiple
context parameters:
t:context="[account.get('test').userUuid, friend]" does not work, see
below please.
Following stuff is in my Java class:
@Property(write = false)
private final String friend = "friend";
public AbstractMap<String, UserAccount> getAccount() {
UserAccount userAcc = userAccounts.get(loopContactIndex);
AbstractMap<String, UserAccount> test = new HashMap<String,
UserAccount>();
test.put("test", userAcc);
return test;
}
void onChangeRelation(final String uuid, final String relation) {
// no chance to come inside here...
}
void onForget(final String uuid) {
// everything ok here...
}
It is no problem to call "onForget" with this eventlink:
<t:eventlink t:event="forget" t:async="true"
t:context="account.get('test').userUuid"> Forget </t:eventlink>
But if I try to call an eventlink like:
<t:eventlink t:event="changeRelation" t:async="true"
t:context="[account.get('test').userUuid, friend]"> Change Relation
</t:eventlink>
then I get following exception:
Exception assembling root component of page profile/User: Exception
assembling embedded component 'usercontactlist' (of type
com.myapp.t5.components.profile.UserContactList, within profile/User):
Could not convert '[account.get('test').userUuid, friend]' into a
component parameter binding: Exception generating conduit for expression
'[account.get('test').userUuid, friend]': Class java.lang.Object does
not contain a property (or public field) named 'userUuid'.
Now I tried this eventlink:
<t:eventlink t:event="changeRelation" t:async="true"
t:context="[${account.get('test').userUuid}, friend]"> Change Relation
</t:eventlink>
And the page loads successful.
But a click on this eventlink, calls the wrong method with only one
parameter which is converted to java.lang.String:
void onChangeRelation(final Object param) {
System.out.println(param.getClass().getName() + ": " + param);
}
Console --> java.lang.String: [018260e7-844c-44a5-aefc-12faa80de42c, friend]
means t:context="[${account.get('test').userUuid}, friend]" is
interpreted as a String.
if I remove the Map and return UserAccount directly in "getAccount()"
the code works great:
<t:eventlink t:event="changeRelation" t:async="true"
t:context="[account.userUuid, friend]"> Change Relation </t:eventlink>
Furthermore I tried to replace the AbstractMap with Optional class:
<t:eventlink t:event="changeRelation" t:async="true"
t:context="[account.get().userUuid, friend]"> Change Relation </t:eventlink>
With this I get the same exception:
Exception assembling root component of page profile/User: Exception
assembling embedded component 'usercontactlist' (of type
com.myapp.t5.components.profile.UserContactList, within profile/User):
Could not convert '[account.get().userUuid, friend]' into a component
parameter binding: Exception generating conduit for expression
'[account.get().userUuid, friend]': Class java.lang.Object does not
contain a property (or public field) named 'userUuid'.
Why the second level is treated as Object, if i want to get a value in
the third level?
(i know, we could solve that by providing another getter in the java
class, but this violates "code less, deliver more" :-)
Why does this occur only in case of an eventlink with multiple parameters?
What i am doing wrong?
Thanks for help!
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