spring-data-mongo querying arrays example - spring-data

Question

I am newbie to the spring-data-mongo. I've the following documents Food and I would like to query using Querying Arrys. I've following Food collection
> db.food.find()
{ "_id" : 1, "fruit" : [ "apple", "banana", "peach" ] }
{ "_id" : 2, "fruit" : [ "apple", "kumquat", "orange" ] }
{ "_id" : 3, "fruit" : [ "cherry", "banana", "apple" ] }
>
And I am using following query I get the proper data. Now same I would like to achieve using Spring-data-mongo
> db.food.find({fruit : {$all : ["apple","banana"]}})
{ "_id" : 1, "fruit" : [ "apple", "banana", "peach" ] }
{ "_id" : 3, "fruit" : [ "cherry", "banana", "apple" ] }
Please refer my development so far:
Food.java
package com.mkyong.model;
import java.util.List;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.Field;
#Document
public class Food {
#Id
private Double id;
#Field
private List<String> fruits;
public Double getId() {
return id;
}
public void setId(Double id) {
this.id = id;
}
public List<String> getFruits() {
return fruits;
}
public void setFruits(List<String> fruits) {
this.fruits = fruits;
}
#Override
public String toString() {
return "Food [id=" + id + ", fruits=" + fruits + "]";
}
}
FoodRepository:
package com.mkyong.reposiroty;
import org.springframework.data.repository.CrudRepository;
import com.mkyong.model.Food;
public interface FoodRepository extends CrudRepository<Food, String>{
}
SpringMongoConfig.java
package com.mkyong.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
import com.mongodb.Mongo;
import com.mongodb.MongoClient;
#Configuration
public class SpringMongoConfig extends AbstractMongoConfiguration {
#Override
public String getDatabaseName() {
return "test";
}
#Override
#Bean
public Mongo mongo() throws Exception {
return new MongoClient("127.0.0.1");
}
}
SpringConfig.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<mongo:mongo host="127.0.0.1" port="27017" />
<mongo:db-factory dbname="test" />
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
</bean>
</beans>
App.java
package com.mkyong.core;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import com.mkyong.config.SpringMongoConfig;
import com.mkyong.model.Food;
public class App {
public static void main(String[] args) {
ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
MongoOperations mongoOperations = (MongoOperations) ctx.getBean("mongoTemplate");
Query q = new Query(Criteria.where("fruit").all("apple","banana"));
List<Food> foods = mongoOperations.find(q, Food.class);
for (Food food : foods) {
System.out.println("-------------------");
System.out.println("ID : "+ food.getId());
System.out.println("Fruits : "+ food.getFruits());
}
}
}
Result of main metthod, it doesn't pull anything. Fruits shows empty. Could any expert please help me to pull data from Fruits Array/List? Please let me know if you need any other information ?
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
-------------------
ID : 1.0
Fruits : null
-------------------
ID : 3.0
Fruits : null

Answer 1

Yes, I am able to resolved the error. The following changes required:
change data type of in Food class to private String[] fruit;
#Document
public class Food {
#Id
private Double id;
#Field
private String[] fruit;
public Double getId() {
return id;
}
public void setId(Double id) {
this.id = id;
}
public String[] getFruit() {
return fruit;
}
public void setFruit(String[] fruit) {
this.fruit = fruit;
}
}
and the following is the output:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Query : Query: { "fruit" : { "$all" : [ "apple" , "banana"]}}, Fields: null, Sort: null
-------------------
ID : 1.0
Fruits : apple,banana,peach
-------------------
ID : 3.0
Fruits : cherry,banana,apple