Field required a bean of type that could not be found error spring restful API using mongodb

Question

So I ve been learning Spring in the couples of week  been following this tutorial  Building a RESTful Web Service  All was well until I tried to integrate it to mongodb  So I follow this tutorial   Accessing Data with MongoDB  But my practice is partially still using the first one  So my project directory structure is like this   src   -- main        -- java           -- model               -- User java          -- rest               -- Application java              -- IndexController java              -- UsersController java          -- service               -- UserService java  -- resources       -- application properties   This is my model User java file  package main java model   import org springframework data annotation Id  import org springframework data mongodb core mapping Document    Document collection  user   public class User        private int age      private String country        Id     private String id      private String name        public User             super               public String getId             return id             public void setId String id            this id   id             public String getName             return name             public void setName String name            this name   name             public int getAge             return age             public void setAge int age            this age   age             public String getCountry             return country             public void setCountry String country            this country   country            This is my rest UsersController java file  package main java rest   import java util List  import main java service UserService  import main java model User  import org springframework beans factory annotation Autowired  import org springframework web bind annotation RequestMapping  import org springframework web bind annotation RequestMethod  import org springframework web bind annotation RequestParam  import org springframework web bind annotation RestController    RestController  RequestMapping value     users   public class UsersController         Autowired     UserService userService        RequestMapping method   RequestMethod GET      public List lt User gt  getAllUsers             return userService findAll              This is my service UserService java file  package main java service   import java util List  import main java model User  import org springframework data mongodb repository MongoRepository   public interface UserService extends MongoRepository lt User  String gt        public List lt User gt  findAll        I could compile them  I m using gradle for compilation because I m following the tutorial   but when I run the jar file it was throwing this error            APPLICATION FAILED TO START            Description       Field userService in main java rest UsersController required a bean of   type  main java service UserService  that could not be found       Action       Consider defining a bean of type  main java service UserService  in   your configuration    Not sure what is wrong I start googling around and found that I need to include Beans xml file and register the userService in it  I did that but it s not working  I m really new to this so I really have no clue on what s going on

User · Accepted Answer

Solved it  So by default  all packages that falls under  SpringBootApplication declaration will be scanned   Assuming my main class ExampleApplication that has  SpringBootApplication declaration is declared inside com example something  then all components that falls under com example something is scanned while com example applicant will not be scanned   So  there are two ways to do it based on this question  Use   SpringBootApplication scanBasePackages    com example something    com example application      That way  the application will scan all the specified components  but I think what if the scale were getting bigger     So I use the second approach  by restructuring my packages and it worked   Now my packages structure became like this   src   -- main        -- java           -- com example               -- Application java          -- com example model               -- User java          -- com example controller               -- IndexController java              -- UsersController java          -- com example service               -- UserService java  -- resources       -- application properties

User · Answer

Using all   Annotations fixed my problem   Yes  I m new into Spring  If you are using a service class add  Service  and same for  Controller and  Repository   Then this annotations on the App java fixed the issue  I m using JPA   Hibernate    SpringBootApplication  EnableAutoConfiguration exclude     ErrorMvcAutoConfiguration class     ComponentScan basePackages     es unileon inso2     EntityScan  es unileon inso2 model    EnableJpaRepositories  es unileon inso2 repository     Package tree   src   -- main        -- java           -- es unileon inso2               -- App java          -- es unileon inso2 model               -- User java          -- es unileon inso2 controller               -- IndexController java              -- UserController java          -- es unileon inso2 service                -- UserService java          -- es unileon inso2 repository                -- UserRepository java  -- resources       -- application properties

User · Answer

My Mapper implementation classes in my target folder had been deleted  so my Mapper interfaces had no implementation classes anymore  Thus I got the same error Field     required a bean of type    Mapper that could not be found   I simply had to regenerate my mappers implementations with maven  and refresh the project

User · Answer

Using this solved my issue    SpringBootApplication scanBasePackages   com example something    com example application

User · Answer

I had the same problem I removed the  Autowired Annotation from the controller  If your repository is a class then the Autowired Annotation is needed to use the repository but when it is an interface you do not need to add the  Autowired Annotation from my experience

User · Answer

Spent a lot of time because of the auto-import  Intellij Idea somewhy imported  Service from import org jvnet hk2 annotations Service  instead of import org springframework stereotype Service

User · Answer

Normally we can solve this problem in two aspects    proper annotation should be used for Spring Boot scanning the bean  like  Component  the scanning path will include the classes just as all others mentioned above     By the way  there is a very good explanation for the difference among  Component    Repository   Service  and  Controller

User · Answer

For me this message  org apache wicket WicketRuntimeException  Can t instantiate page using constructor  public org package MyClass org apache wicket request mapper parameter PageParameters   and argument     Might be it doesn t exist  may be it is not visible  public    meant  quot in my wicket unit test at the top you have to manually add that bean in like quot  appContext putBean myClass

User · Answer

I also had the same error                               APPLICATION FAILED TO START                              Description   Field repository in com kalsym next gen campaign controller CampaignController required a bean of type  com kalsym next gen campaign data CustomerRepository  that could not be found    Action   Consider defining a bean of type  com kalsym next gen campaign data CustomerRepository  in your configuration de here   And my packages were constructed in the same way as mentioned in the accepted answer  I fixed my issue by adding EnableMongoRepositories annotation in the main class like this    SpringBootApplication  EnableMongoRepositories basePackageClasses   CustomerRepository class  public class CampaignAPI        public static void main String   args            SpringApplication run CampaignAPI class  args             If you need to add multiple don t forget the curly braces    EnableMongoRepositories basePackageClasses                 MSASMSRepository class  APartyMappingRepository class

User · Answer

For anybody who was brought here by googling the generic bean error message  but who is actually trying to add a feign client to their Spring Boot application via the  FeignClient annotation on your client interface  none of the above solutions will work for you  To fix the problem  you need to add the  EnableFeignClients annotation to your Application class  like so   SpringBootApplication         other pre-existing annotations       EnableFeignClients     lt ------- THE IMPORTANT ONE public class Application    In this way  the fix is similar to the  EnableMongoRepositories fix mentioned above  It s a shame that this generic error message requires such a tailored fix for every type of circumstance

User · Answer

This may happen when two beans have same names   Module1Beans java    Configuration public class Module1Beans        Bean     public GoogleAPI retrofitService            Retrofit retrofit   new Retrofit Builder                    baseUrl  https   www google com                     addConverterFactory JacksonConverterFactory create                     build            return retrofit create GoogleAPI class             Module2Beans java    Configuration public class Module2Beans        Bean     public GithubAPI retrofitService            Retrofit retrofit   new Retrofit Builder                    baseUrl  https   www github com                     addConverterFactory JacksonConverterFactory create                     build            return retrofit create GithubAPI class             A bean named retrofitService is first created  and it s type is GoogleAPI  then covered by a GithubAPI becauce they re both created by a retrofitService   method   Now when you  Autowired a GoogleAPI you ll get a message like Field googleAPI in com example GoogleService required a bean of type  com example rest GoogleAPI  that could not be found

User · Answer

In my case i have just put the Class MyprojectApplication in a package com example start  with the same level of model  controller service packages

User · Answer

Add the  Service in the service UserService java

User · Answer

In order to spring to create bean and inject it class should be marked with  Componet  service  Repository etc in your context it should be package main java service   import java util List  import main java model User  import org springframework data mongodb repository MongoRepository   Repository public interface UserService extends MongoRepository lt User  String gt        public List lt User gt  findAll

User · Answer

You have to add the  Service annotation to the implementation of your service

User · Answer

I know it is old  but wanna add my 5 cents   I used  service and  service impl in a folder structure to separate the service with it s implementation  Forget to implement the ServiceImplementation piece

User · Answer

This thread is old now but I am posting my answer  which may be useful for others   I had the same issue  It turned out that there is another class with the same name in other module  I renamed that class and it solved the issue

User · Answer

Add the  Component in your controller class  May this work

User · Answer

I had the same issue  My mistake was that I used  Service annotation on the Service Interface  The  Service annotation should be applied to the ServiceImpl class

User · Answer

I have same Issue  fixed by Adding  EnableMongoRepositories  in topthree util    package in topthree core   import org springframework beans factory annotation Autowired  import org springframework boot CommandLineRunner  import org springframework boot SpringApplication  import org springframework boot autoconfigure SpringBootApplication  import org springframework data mongodb repository config EnableMongoRepositories   import in topthree util Student    SpringBootApplication  EnableMongoRepositories  in topthree util   public class Run implements CommandLineRunner        public static void main String   args            SpringApplication run Run class  args           System out println  Run                Autowired     private Process pr        Override     public void run String    args  throws Exception           pr saveDB new Student  Testing    FB             System exit 0              And my Repository is   package in topthree util   import org springframework data mongodb repository MongoRepository   public interface StudentMongo extends MongoRepository lt Student  Integer gt         public Student findByUrl String url       Now Its Working

User · Answer

I encountered the same issue and all I had to do was to place the Application in a package one level higher than the service  dao and domain packages

User · Answer

you have to import  spring-boot-starter-data-jpa as dependeny if you use spring boot

User · Answer

I have come to this post looking for help while using Spring Webflux with Mongo Repository   My error was similar to owner  Field usersRepository in foobar UsersService required a bean of type  foobar UsersRepository  that could not be found    As I was working before with Spring MVC I was surprised by this error   Because finding help was not so obvious I m putting answer to this question as it is somehow related and this question is high in search results   First thing is you must remember about what was mentioned in answer marked as accepted - package hierarchy   Second important thing is that if you use Webflux you need to use some different package while when using Spring MVC e g  for MongoDB you need to add   lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-data-mongodb-reactive lt  artifactId gt   lt  dependency gt    with -reactive at the end

User · Answer

Add  Repository in your dao class       Repository     public interface UserDao extends CrudRepository lt User  Long gt             User findByUsername String username            User findByEmail String email

User · Answer

Two types of mongo dependencies -  lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-data-mongodb-reactive lt  artifactId gt   lt  dependency gt   lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-data-mongodb lt  artifactId gt   lt  dependency gt    Two types of repositories - MongoRepository ReactiveMongoRepository  Make sure you are using the right combination

User · Answer

I followed all steps and instructions followed by OP here  took care of blank space around username and password even though spring takes care of whitespaces in properties file   still was either facing could not find bean for    Repository   you interface which extends JPARepository  OR after adding  EnableJPARepository could not find bean for EntityManagerFactory  i solved it by changing spring boot starter parent version from 2 3 2 to 2 2 1 in pom xml  lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 2 2 1 RELEASE lt  version gt       lt relativePath   gt   lt  -- lookup parent from repository -- gt   lt  parent gt   and adding following dependency  lt dependency gt       lt groupId gt mysql lt  groupId gt       lt artifactId gt mysql-connector-java lt  artifactId gt       lt scope gt runtime lt  scope gt   lt  dependency gt   I did not need to add any of following  spring boot does it itself   EnableJPAReposity - since i already had all class with same root package spring data jpa repositories enabled  in application properties spring datasource driverClassName com mysql jdbc Driver in application properties

User · Answer

Add  Repository in you dao class  example    Repository public class DaoClassName implements IIntefaceDao

[java] 'Field required a bean of type that could not be found.' error spring restful API using mongodb

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