Spring Boot JPA repositories custom query - spring-boot

Question

http://spring.io/guides/gs/accessing-data-jpa/
Referred the above link to define a custom query.
We have a developed a Spring boot web service CRUD application but we are facing the following exception when we add a custom query.
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'EmployeeController': Unsatisfied dependency expressed through field 'EmployeeService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'EmployeeServiceImpl': Unsatisfied dependency expressed through field 'EmployeeRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'EmployeeRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property name found for type Employee!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'EmployeeServiceImpl': Unsatisfied dependency expressed through field 'EmployeeRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'EmployeeRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property name found for type Employee!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'EmployeeRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property name found for type Employee!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property name found for type Employee!
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:77) ~[spring-data-commons-1.13.4.RELEASE.jar:naat org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) ~[spring-data-commons-1.13.4.RELEASE.jar:na]
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) ~[spring-data-commons-1.13.4.RELEASE.jar:na]
This was the repository interface that I have defined. Defined a custom query.
package com.example.rest.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.example.rest.model.Employee;
#Repository
public interface EmployeeRepository extends JpaRepository<Employee, Long> {
Employee findByName(String employeeName);}
This is my service interface
package com.example.rest.service;
import java.util.List;
import com.example.rest.model.Employee;
public interface EmployeeService {
Employee save(Employee employee);
Employee getById(Long employeeId);
void delete(Long employeeId);
List<Employee> findAll();
Employee findByName(String employeeName); }
This is my Service Implementation class
package com.example.rest.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.example.rest.model.Employee;
import com.example.rest.repository.EmployeeRepository;
#Service
public class EmployeeServiceImpl implements EmployeeService {
#Autowired
EmployeeRepository employeeRepository;
#Override
public Employee save(Employee employee) {
// TODO Auto-generated method stub
return employeeRepository.save(employee);
}
#Override
public Employee getById(Long employeeId) {
// TODO Auto-generated method stub
return employeeRepository.getOne(employeeId);
}
#Override
public void delete(Long employeeId) {
// TODO Auto-generated method stub
employeeRepository.delete(employeeId);
}
#Override
public List<Employee> findAll() {
// TODO Auto-generated method stub
return employeeRepository.findAll();
}
#Override
public Employee findByName(String employeeName) {
// TODO Auto-generated method stub
return employeeRepository.findByName(employeeName);
}}
Without custom query my application works fine.
Let me know where I have made a mistake.
I have added the model class
package com.example.rest.model;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="testF")
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(nullable=false, unique=true)
private Long employeeId;
#Column(nullable=false, unique=true)
private String employeeName;
#Column(nullable=false)
private String emailId;
#Column(nullable=false)
private Long salary;
public Employee() {
}
public Employee(Long employeeId, String employeeName, String emailId, Long salary) {
this.employeeId = employeeId;
this.employeeName = employeeName;
this.emailId = emailId;
this.salary = salary;
}
public Long getEmployeeId() {
return employeeId;
}
public void setEmployeeId(Long employeeId) {
this.employeeId = employeeId;
}
public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public Long getSalary() {
return salary;
}
public void setSalary(Long salary) {
this.salary = salary;
}
#Override
public String toString() {
return "Employee [employeeId=" + employeeId + ", employeeName=" + employeeName + ", emailId=" + emailId
+ ", salary=" + salary + "]";
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((employeeId == null) ? 0 : employeeId.hashCode());
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Employee other = (Employee) obj;
if (employeeId == null) {
if (other.employeeId != null)
return false;
} else if (!employeeId.equals(other.employeeId))
return false;
return true;
}}

Answer 1

you don't have field 'name' in class Employee.
spring data try created query for search Employee with field name.
Employee findByName(String employeeName);}

Answer 2

Your model doesn't have name property, you have employeeName, so your query should look like this:
Employee findByEmployeeName(String employeeName);
Please see reference for more info on how to build Spring Data queries. In short, when you want to create a query you have to specify full field name how it is written in your Entity.

Answer 3

u can't write findByName in your custom query because u don't have a name field however u can write EmployeeName