How to implement search functionality for custom portlet in liferay 7?

[Abhishek Jain, modifié il y a 7 années.]

I have created an entity named Slogan. I want to add search functionality to this entity. For this I wrote following code :-
SearchContext searchContext = SearchContextFactory.getInstance(PortalUtil.getHttpServletRequest(req));
searchContext.setKeywords("a");
searchContext.setStart(0);
searchContext.setEnd(100);
Indexer indexer = IndexerRegistryUtil.getIndexer(Slogan.class);
Hits results = null;
try {
results = indexer.search(searchContext);
} catch (SearchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Document[] docs = results.getDocs();
System.out.println("length is "+docs.length);

But here I am getting NullPointerException as the value for results is null. It means indexer.search() is returning null. Any idea how to remove this error and bring the search functionality in the portlet successfully. Please help..thanx in advance..

[Mohammad Azharuddin, modifié il y a 7 années.]

why cant you use finder method or dynamic query to filter the results

[Abhishek Jain, modifié il y a 7 années.]

I tried with dynamic query but I got an error-java.lang.ClassNotFoundException: com.example.model.impl.SloganImpl. And this class is present in the jar andI included its dependency in the build.gradle and clicked on gradle->Refresh gradle. But then too, problem persists. Can you tell me how to eradicate it?

[Mohammad Azharuddin, modifié il y a 7 années.]

Abhishek Jain:

I tried with dynamic query but I got an error-java.lang.ClassNotFoundException: com.example.model.impl.SloganImpl. And this class is present in the jar andI included its dependency in the build.gradle and clicked on gradle->Refresh gradle. But then too, problem persists. Can you tell me how to eradicate it?

Try adding both service modules inside your module

compile project(":modules:testing-services:testing-services-api")
compile project(":modules:testing-services:testing-services-service")

and select liferay workplace & cntl+f5

[Abhishek Jain, modifié il y a 7 années.]

I already tried that but no success..now I changed the server and database but again NullPointerException with the code that I mentioned in my question!! Any sort of help would be appreciated..

[Mohit Soni, modifié il y a 6 années.]

Can you share the code "how you are calling dynamic query?"

[Denis Kipchakbaev, modifié il y a 6 années.]

Did you create an Indexer for your Slogan entity?