Poll Display portlet : how to use same instance?

[Paul .，修改在12 年前。]

I am just begining with Liferay, is there a way to use same question on poll display portlet.
For instance, if I place poll display portlet on different pages and configure it to use same question. Now if I want to change the question I'll have to configure it on all pages. Is there a way so that the configuration is changed everywhere? The other option of changing the question text itself is not workable as if a user already voted to such question, the users is shown voted on the changed text too.

[Sandeep Nair，修改在12 年前。]

Hi,

Since they are all having separate portlet instance its not possible technically.

But there is a hack and a way around it, if you wanna try. Basically the idea is to have same instance right. Go to manage page for the page(destination) on which you want same portlet instance(source). There is an option called copy portlets and then drop down to select page from where you want to copy. Select the source page and click save. Now both pages have same instanced portlets. Remove the portlets you dont want and just keep the polls portlet

Regards,
Sandeep

[Paul .，修改在12 年前。]

Hi Sandeep,

Thanks a lot for this input. However I am looking into an alternative. I'll place them in the layout itself using

$processor.processPortlet("59_INSTANCE_abcd")

This works (to the extent of getting the instance Id right , as you mentioned) however, it still doesn't show the selected question. Perhaps it's somewhere dependent on layout / pageid also?

[Paul .，修改在12 年前。]

I checked in the database, it's bound to 'plid' in portletPreferences table
Then I see no other option yet except for doing a database update with preferences.
Any other ideas?

[Sandeep Nair，修改在12 年前。]

Is it possible for you to create a portletpreference model listener for update event wherein you search the portletId(the ones having the same instance) and update the preference for each of them.

Regards,
Sandeep

[Paul .，修改在12 年前。]

Thanks Sandeep, I did that and works fine. I am thinking about the overhead that it would add since it will check for all portlets. Also I am looking for a way to clear the cache, as the change isn't reflected.

[Sandeep Nair，修改在12 年前。]

Hmm, I agree it will be a performance hit, every time preference is updated. Is it the db cache you are wanting to clear, if so you can use CacheRegistryUtil.clear();

Regards,
sandeep

[Hector Leon Garay，修改在12 年前。]

Hello Paul
I would like to know if you can show me please the way you did to create the portletpreference model listener in order to update the portlet id? I have an idea of what you asked Sandeep, but I don't know where to start

Regards

[Hector Leon Garay，修改在12 年前。]

Somebody can help me please?

[Paul .，修改在12 年前。]

Hi Hector,

Sorry for the late reply. Here is how you can achive this with a properties hook.
You need to create a value.object hook to add a listerner that will be called when preferences are updated, deleted etc.
Check out this post for any help (http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Portal+Hook+Plugins)

value.object.listener.com.liferay.portal.model.PortletPreferences=com.abc.PortletPreferenceListener

This custom listener should

implements ModelListener<portletpreferences> {</portletpreferences>

When the preferences are updated this method will be called so you override it.

public void onAfterUpdate(PortletPreferences model)

You can get the preferences of the model being updated and get the rest of prefernces to be updated using Dyanmic query.
Here is a snippet to achive this.

DynamicQuery query = DynamicQueryFactoryUtil.forClass(PortletPreferences.class, PortalClassLoaderUtil.getClassLoader()).add(PropertyFactoryUtil.forName("portletId").like("59_INSTANCE_%"));
		
		try {
			List<portletpreferences> portletPreferences = PortletPreferencesLocalServiceUtil.dynamicQuery(query);
			for(PortletPreferences portletPreference: portletPreferences){
				try {
					portletPreference.setPreferences(PortletPreferencesLocalServiceUtil.getPortletPreferences(model.getPortletPreferencesId()).getPreferences());
				}</portletpreferences>

Hope it helps.

[Dhrutika Parekh，修改在12 年前。]

Hi,

If you don't require to add polls portlet on same page more than once,then make that portlet non-instanciable.

Regards,
Dhrutika

[Hector Leon Garay，修改在12 年前。]

Hi Dhrutika.
Thanks for your answer, I will try what you said and tell you later, but as you said, I don't need right now to have more than one portlet on the same page, but I need to have the same poll question display on every page on the community site.

Regards

HL

[Hector Leon Garay，修改在12 年前。]

Hi Dhrutika.

Sorry for the delay, the way you told to didn't work, I'm using Paul's way, which I will post later.

Thanks Again

HLG