Caused by: org.bson.codecs.configuration.CodecConfigurationException: Can't find a codec for class com.example.Hobbies

问题:

How to insert the embedded documents using BSONObject? When I am trying to insert the embedded document, getting error shown below.

I wanted to save null values for the Date and firstName for example. I tried some options using Spring Data Mongo, but it doesn't work out well.

I am getting below error:

java.lang.IllegalStateException: Failed to execute CommandLineRunner     at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:816) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]     at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:797) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]     at org.springframework.boot.SpringApplication.run(SpringApplication.java:324) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]     at com.example.MongoPocApplication.main(MongoPocApplication.java:24) [classes/:na] Caused by: org.bson.codecs.configuration.CodecConfigurationException: Can't find a codec for class com.example.Hobbies.     at org.bson.codecs.configuration.CodecCache.getOrThrow(CodecCache.java:46) ~[bson-3.8.2.jar:na]     at org.bson.codecs.configuration.ProvidersCodecRegistry.get(ProvidersCodecRegistry.java:63) ~[bson-3.8.2.jar:na]     at org.bson.codecs.configuration.ChildCodecRegistry.get(ChildCodecRegistry.java:51) ~[bson-3.8.2.jar:na]     at com.mongodb.DBObjectCodec.writeValue(DBObjectCodec.java:231) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.DBObjectCodec.encodeIterable(DBObjectCodec.java:292) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.DBObjectCodec.writeValue(DBObjectCodec.java:219) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.DBObjectCodec.encode(DBObjectCodec.java:149) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.DBObjectCodec.encode(DBObjectCodec.java:65) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.BasicDBObject.toJson(BasicDBObject.java:194) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.BasicDBObject.toJson(BasicDBObject.java:167) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.BasicDBObject.toJson(BasicDBObject.java:154) ~[mongodb-driver-core-3.8.2.jar:na]     at com.mongodb.BasicDBObject.toString(BasicDBObject.java:238) ~[mongodb-driver-core-3.8.2.jar:na]     at java.lang.String.valueOf(String.java:2994) ~[na:1.8.0_171]     at java.io.PrintStream.println(PrintStream.java:821) ~[na:1.8.0_171]     at com.example.MongoPocApplication.savePersons(MongoPocApplication.java:70) [classes/:na]     at com.example.MongoPocApplication.run(MongoPocApplication.java:34) [classes/:na]     at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:813) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE] 

Person.java

@Builder @Data @AllArgsConstructor @NoArgsConstructor @Document public class Person {     @Id     private String id;     @Field     private String firstName;     @Field     private String lastName;      @Field     private String emailId;     @Field     private List<Hobbies> hobbies; } 

Hobbies:

@Builder @Data @AllArgsConstructor @NoArgsConstructor public class Hobbies {     private String interest;     private String sports; } 

Main

BSONObject personBsonObj = BasicDBObjectBuilder.start()                 .add("firstName","John")                 .add("lastName", null)                 .add("email","john.kerr@gmail.com")                 .add("hobbies",Arrays.asList(hobbies1, hobbies2, hobbies4)).get();          BSONObject insert = mongoTemplate.insert(personBsonObj,"person");         System.out.println(insert); 

回答1:

I was able to solve this issue like below. I wonder if we can do this using Spring Data Mongo Repository query ?

Document hobbies1 = new Document(); hobbies1.put("interest", "Indoor"); hobbies1.put("sports", "Chess");  Document hobbies2 = new Document(); hobbies2.put("Loveoor", "Table Tennis"); hobbies2.put("Gamedoor", "Cricket");  BSONObject personBsonObj = BasicDBObjectBuilder.start()     .add("firstName","John")     .add("lastName", null)     .add("email","john.kerr@gmail.com")     .add("hobbies",Arrays.asList(hobbies1, hobbies2)).get(); BSONObject insert = mongoTemplate.insert(personBsonObj,"person");     System.out.println(insert); 

文章来源: Caused by: org.bson.codecs.configuration.CodecConfigurationException: Can't find a codec for class com.example.Hobbies