elvis :
I try to use Query DSL with MongoDB in Spring Boot and I get an error. The app is working successfully without using the library for Query DSL for MongoDB. And I want to use this library because I want to use more complex queries. The code should work, I think there is a little mistake somewhere.
The problem is when I click Maven package I get these errors, unfortunatelly I can't post all the output here:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'hotelController' defined in file [C:\Users\dgs\IdeaProjects\springboot-mongodb\target\classes\com\dgs\springbootmongodb\controller\HotelController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'hotelController' defined in file [C:\Users\dgs\IdeaProjects\springboot-mongodb\target\classes\com\dgs\springbootmongodb\controller\HotelController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 4.26 s <<< FAILURE! - in com.dgs.springbootmongodb.SpringbootMongodbApplicationTests
[ERROR] contextLoads(com.dgs.springbootmongodb.SpringbootMongodbApplicationTests) Time elapsed: 0.001 s <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'hotelController' defined in file [C:\Users\dgs\IdeaProjects\springboot-mongodb\target\classes\com\dgs\springbootmongodb\controller\HotelController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hotelRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.repository.support.QuerydslMongoPredicateExecutor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: java.lang.IllegalArgumentException: Did not find a query class com.dgs.springbootmongodb.models.QHotel for domain class com.dgs.springbootmongodb.models.Hotel!
Caused by: java.lang.ClassNotFoundException: com.dgs.springbootmongodb.models.QHotel
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.21.0:test (default-test) on project springboot-mongodb: There are test failures.
It is a hotel booking app and this is the code:
The Hotel model:
package com.dgs.springbootmongodb.models;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.index.IndexDirection;
import org.springframework.data.mongodb.core.index.Indexed;
import org.springframework.data.mongodb.core.mapping.Document;
import java.util.ArrayList;
import java.util.List;
// The Hotel is the aggregate root so this is the entity on which we will apply our annotations
@Document(collection = "Hotels")
public class Hotel {
@Id
private String id;
private String name;
@Indexed(direction = IndexDirection.ASCENDING)
private int pricePerNight;
private Address address;
private List<Review> reviews;
protected Hotel() {
this.reviews = new ArrayList<>();
}
public Hotel(String name, int pricePerNight, Address address, List<Review> reviews) {
this.name = name;
this.pricePerNight = pricePerNight;
this.address = address;
this.reviews = reviews;
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public int getPricePerNight() {
return pricePerNight;
}
public Address getAddress() {
return address;
}
public List<Review> getReviews() {
return reviews;
}
}
The HotelRepository interface:
package com.dgs.springbootmongodb.dao;
import com.dgs.springbootmongodb.models.Hotel;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.Query;
import org.springframework.data.querydsl.QuerydslPredicateExecutor;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface HotelRepository extends MongoRepository<Hotel, String>, QuerydslPredicateExecutor<Hotel> {
// findBy + PricePerNight (property name) + LessThan (filter)
List<Hotel> findByPricePerNightLessThan(int maxPrice);
@Query(value = "{address.city:?0}")
List<Hotel> findByCity(String city);
}
The HotelController:
package com.dgs.springbootmongodb.controller;
import com.dgs.springbootmongodb.dao.HotelRepository;
import com.dgs.springbootmongodb.models.Hotel;
import org.springframework.web.bind.annotation.*;
import java.util.List;
import java.util.Optional;
@RestController
@RequestMapping("/hotels")
public class HotelController {
private HotelRepository hotelRepository;
public HotelController(HotelRepository hotelRepository) {
this.hotelRepository = hotelRepository;
}
@GetMapping("/all")
public List<Hotel> getAllHotels() {
List<Hotel> hotels = hotelRepository.findAll();
return hotels;
}
@GetMapping("/{id}")
public Optional<Hotel> getOneHotel(@PathVariable String id) {
return hotelRepository.findById(id);
}
@PostMapping
public Hotel create(@RequestBody Hotel hotel) {
return hotelRepository.save(hotel);
}
@PutMapping
public Hotel update(@RequestBody Hotel hotel) {
return hotelRepository.save(hotel);
}
@DeleteMapping("/delete/{id}")
public List<Hotel> delete(@PathVariable String id) {
hotelRepository.deleteById(id);
return hotelRepository.findAll();
}
@GetMapping("/price/{maxPrice}")
public List<Hotel> getByPricePerNight(@PathVariable int maxPrice) {
List<Hotel> hotels = hotelRepository.findByPricePerNightLessThan(maxPrice);
return hotels;
}
@GetMapping("address/{city}")
public List<Hotel> getByCity(@PathVariable String city) {
List<Hotel> hotels = hotelRepository.findByCity(city);
return hotels;
}
}
This is the pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.dgs</groupId>
<artifactId>springboot-mongodb</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-mongodb</name>
<description>Demo project for Spring Boot with Mongo DB</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Add support for Mongo Query DSL -->
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-mongodb</artifactId>
<version>4.1.3</version>
<exclusions>
<exclusion>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!-- Add plugin for Mongo Query DSL -->
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<dependencies>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>4.1.3</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/generated-sources/annotations</outputDirectory>
<processor>
org.springframework.data.mongodb.repository.support.MongoAnnotationProcessor
</processor>
<logOnlyOnError>true</logOnlyOnError>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Update
This is the starter class:
@SpringBootApplication
public class SpringbootMongodbApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootMongodbApplication.class, args);
}
}
This is the structure of the app:
user2683814 :
Remove the target folder and start over.
apt-maven-plugin generates, compiles source and adds to classpath. Adjust the plugin's output directory to target/generated-sources/apt.
Run the maven package phase and verify Q class files are inside models packages in targets/classes location and Q source files are inside models package in target/generated-sources/apt.