Re: Unable to get clientId in a component [T5.3.8]

Hi,

I can't see the actual .tml, as either it was stripped by the mailer or you
forgot to include it. But I guess compareDateRangeFrom component is in .tml
after dateRangePresent component, and Tapestry not yet allocated a client
ID for it. Generating client IDs is a bit complicated in Tapestry as a
single Tapestry component can be rendered multiple times (e.g. in loops).
There is "heartbeat" mechanism, that helps to solve such problems, e.g. see
Tapestry's Label implementation. Try following approach:

@Import(library = "DateRangePreset.js")
void afterRender() {
     renderLater();
}

@HeartbeatDeferred
private void renderLater() {

        JSONObject specs = new JSONObject();
        specs.put("select", "#" + dateRangePresetSelect.getClientId());
        specs.put("dateRangeFrom", "#" + dateRangeFrom.getClientId());
        logger.info("ff: " + relatedRangeFrom);

        if (relatedRangeFrom != null) {
            logger.info("rel: " + relatedRangeFrom.getClientId());
            // specs.put("relatedRangeFrom", "#" +
relatedRangeFrom.getClientId());
            specs.put("relatedRangeFrom", "#compareDateRangeFrom");
        }

}


Best regards,
Cezary



On Mon, Jan 9, 2017 at 9:24 PM, Tony Nelson <[email protected]> wrote:

> I’m trying to build a simple component that references up to 4 components
> on my page.
>
> I’m using the component like this:
>
>
>                 <t:dateRangePreset
>                         t:dateRangeFrom="dateRangeFrom"
> t:dateRangeTo="dateRangeTo"
>                         t:relatedRangeTense="FUTURE"
>                         t:relatedRangeFrom="compareDateRangeFrom"
> t:relatedRangeTo="compareDateRangeTo"
>                         t:disableDateRangePeriodTypes="DAILY"
> t:disableDateRangeTense="FUTURE" />
>
>
> dateRangeFrom, dateRangeTo are both required in the component, and work
> fine
>
>     @Parameter(required = true, defaultPrefix = BindingConstants.COMPONENT)
>     private Field dateRangeFrom;
>
>     @Parameter(required = true, defaultPrefix = BindingConstants.COMPONENT)
>     private Field dateRangeTo;
>
> relatedRangeFrom and relatedRangeTo are non-null, in after render, and
> they are the right type, but the clientId always returns null
>
>     @Parameter(required = false, defaultPrefix =
> BindingConstants.COMPONENT)
>     private Field relatedRangeFrom;
>
>     @Parameter(required = false, defaultPrefix =
> BindingConstants.COMPONENT)
>     private Field relatedRangeTo;
>
>
> afterRender() does the normal things
>
>     @Import(library = "DateRangePreset.js")
>     void afterRender() {
>
>         JSONObject specs = new JSONObject();
>         specs.put("select", "#" + dateRangePresetSelect.getClientId());
>         specs.put("dateRangeFrom", "#" + dateRangeFrom.getClientId());
>         logger.info("ff: " + relatedRangeFrom);
>
>         if (relatedRangeFrom != null) {
>             logger.info("rel: " + relatedRangeFrom.getClientId());
>             // specs.put("relatedRangeFrom", "#" +
> relatedRangeFrom.getClientId());
>             specs.put("relatedRangeFrom", "#compareDateRangeFrom");
>         }
>
> }
>
> In the log I see
>
> [INFO ][DateRangePreset] ff: org.apache.tapestry5.corelib.
> components.DateField@46490fee
> [INFO ][DateRangePreset] rel: null
>
>
> The only thing that’s different between the required DateFields and the
> optional ones, are that the required ones are before my component, the
> optional ones are after my component, but that shouldn’t have anything to
> do with.
>
> For completeness, here is more of my .tml file, what you see here are the
> two required date fields, my new component, and then the two optional date
> fields.
>
> Thanks in advance for any help.
> Tony
>
>
>
>
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