如何解决Morphia-MongoDB-“请为用户标记的ID字段实体覆盖此方法”
| 我正在关注code.google上的教程提及，但我的示例未能给出以下跟踪信息：java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.google.code.morphia.mapping.MappedClass.callLifecycleMethods(MappedClass.java:323)
at com.google.code.morphia.mapping.Mapper.toDBObject(Mapper.java:371)
at com.google.code.morphia.DatastoreImpl.entityToDBObj(DatastoreImpl.java:674)
at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:722)
at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:802)
at com.google.code.morphia.DatastoreImpl.save(DatastoreImpl.java:796)
at models.com.vlist.activity.classes.TestMongoData.testUserData(TestMongoData.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.code.morphia.mapping.MappedClass.callLifecycleMethods(MappedClass.java:304)
... 28 more
Caused by: java.lang.UnsupportedOperationException: Please override this method for user marked Id field entity: models.com.vlist.activity.classes.User
at play.modules.morphia.Model.setId_(Model.java:284)
at play.modules.morphia.Model.generateId_(Model.java:299)
... 33 more
import javax.persistence.Entity;
import org.bson.types.ObjectId;
import com.google.code.morphia.Datastore;
import com.google.code.morphia.Morphia;
import com.google.code.morphia.annotations.Id;
import play.modules.morphia.Model;
@Entity
public class User extends Model {
@Id ObjectId id;
private String firstName;
private String lastName;
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName(){
return firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getLastName() {
return lastName;
}
}
import static org.junit.Assert.*;
import org.junit.Test;
import com.google.code.morphia.Datastore;
import com.google.code.morphia.Morphia;
public class TestMongoData {
@Test
public void testUserData() {
User user = new User();
user.setFirstName(\"first\");
user.setLastName(\"last\");
Morphia morphia = new Morphia();
Datastore ds = morphia.createDatastore(\"testData\");
ds.save(user);
}
}
play test
08:01:55,783 ERROR ~
@66h1bm10d
Internal Server Error (500) for request GET /@tests
Compilation error (In {module:morphia}/app/morphia/Filter.java around line 8)
The file {module:morphia}/app/morphia/Filter.java could not be compiled. Error raised is : The type Filter is already defined
play.exceptions.CompilationException: The type Filter is already defined
at play.classloading.ApplicationCompiler$2.acceptResult(ApplicationCompiler.java:246)
at org.eclipse.jdt.internal.compiler.Compiler.handleInternalException(Compiler.java:672)
at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:516)
at play.classloading.ApplicationCompiler.compile(ApplicationCompiler.java:278)
at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:406)
at play.Play.start(Play.java:453)
at play.Play.detectChanges(Play.java:574)
at play.Invoker$Invocation.init(Invoker.java:186)
at Invocation.HTTP Request(Play!)
解决方法
问题来自您的@Entity定义。您正在使用JPA批注，而应该使用Morphia批注。
启动时，Morphia插件将检索标记有“ morphia Entity”注释的所有类，并使用各种注入的模型方法对其进行增强。您正在收到此异常，因为您的模型类没有得到增强。
,如果您对@Id进行注释，则通过为void setId_（Object id）方法提供正确的实现，播放语态将不会增强您的模型。尝试这样定义自己。
@Entity
class User extends Model {
@Id String email;
protected void setId_(Object id) {
}
}
public String firstName;
public String lastName;
import com.google.code.morphia.annotations.Entity;
import static org.junit.Assert.*;
import org.junit.Test;
import play.test.UnitTest;
public class TestMongoData extends UnitTest {
@Test
public void testUserData() {
User user = new User();
user.setFirstName(\"first\");
user.setLastName(\"last\");
user.save();
}
}