2

I am using couchbase3 with spring-data-couchbase, and want to query data using spring data repository with multiple columns.

public interface UserAccountRepository extends CrudRepository<UserAccount, Long> {
public UserAccount findByEmail(Query eMail);
public UserAccount findByEmailAndStatus(Query query); // fn with multiple column, but not getting the result
}

How should I write Map function and Reduce function for the same?

For the function findByEmail(Query eMail); to work, I have added the view with Map fn()

function (doc, meta) {
  emit(doc.email,doc);
}

This view have email as key, and value is the document. But if i need to query using email and status? How should the view look like ?

I have seen this link, but not very clear. https://stackoverflow.com/questions/28938755

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Benoy Prakash
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2 Answers2

1

I was able make springdata function to invoke a compound Key view. My Document name is : Data Compound Key View

function (doc, meta) {
  if(doc && doc._class == "com.couchbase.entity.Data"){
    emit([doc.key1, doc.key2], doc);
  }
}

SpringData Repository Inferface shown below : 

package com.couchbase.repository;

import java.util.List;
import org.springframework.data.couchbase.core.view.View;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
import com.couchbase.client.protocol.views.Query;
import com.couchbase.entity.Data;

public interface DataRepository extends CrudRepository<Data, String> {

    @View(designDocument="Data",viewName="findByKey1AndKey2")
    public List<Data> findByKey1AndKey2(Query query);
}

Test Class shown below :

import com.couchbase.client.protocol.views.ComplexKey;
import com.couchbase.client.protocol.views.Query;

public class DataTest extends WebAppConfigurationAware{

    @Autowired
    private DataRepository dataRepository;

    @Test
    public void testStringDataCompoundQuery(){
        Object[] objArr = new Object[2];
        objArr[0] = "aaa";
        objArr[1] = 1;

        Query query = new Query();
        query.setKey(ComplexKey.of(objArr));

        System.out.println(dataRepository.findByKey1AndKey2(query));

    }
}

If this was useful for you, please up vote

Benoy Prakash
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0

You could use compound key like describe in the documentation here: http://docs.couchbase.com/developer/dev-guide-3.0/compound-keys.html

Laurent Doguin
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