spring-data

问题 I am trying to index a document to a specific collection in solr. The collection name is 'program'. I am using spring data solr. I am getting the below error when trying to save the document: HTTP ERROR 404 Problem accessing /solr/update. Reason:Not Found My assumption is that the annotation @SolrDocument is not recognized. spring-data-solr is trying to post the document to /solr/update whereas it should try to post it to /solr/program/update.However I am not sure how to prove it or fix it.

问题 I have an entity which looks like: @Audited @Data @MappedSuperclass @EntityListeners(AuditingEntityListener.class) public abstract class BaseEntity { public static final long UNSAVED = 0; @Id @GeneratedValue private long id; @CreatedDate @Column(name = "created_at", updatable = false) private ZonedDateTime createdAt; @CreatedBy @OneToOne(fetch = FetchType.EAGER) @JoinColumn(name = "created_by") private User createdBy; @LastModifiedDate private ZonedDateTime updatedAt; @OneToOne(fetch =

问题 I have an entity which looks like: @Audited @Data @MappedSuperclass @EntityListeners(AuditingEntityListener.class) public abstract class BaseEntity { public static final long UNSAVED = 0; @Id @GeneratedValue private long id; @CreatedDate @Column(name = "created_at", updatable = false) private ZonedDateTime createdAt; @CreatedBy @OneToOne(fetch = FetchType.EAGER) @JoinColumn(name = "created_by") private User createdBy; @LastModifiedDate private ZonedDateTime updatedAt; @OneToOne(fetch =

问题 I'm trying to use Spring Data JDBC to access a table that has a compound key, and although I can find lots of info on how Spring Data JPA handles this, the same doesn't seem to apply to Spring Data JDBC. Can anyone give a quick example of how you need to declare an Entity/Repository with Spring Data JDBC to talk to a table with a compound primary key ? (Eg. Two Strings) 回答1: Using the CrudRepository for compound keys is currently (Version 1.0.2) not possible. Of course, you can still use

问题 I wonder if there is a way to retrieve a generated value from database as an extra column and map it to a transient value. I'll try to explain myself, I wish something like this: @Entity @Table(name = "thing") public class Thing { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "itemid") private Long itemId; private String someValue; @Transient private double distance; // constructors, getters, setters, etc.. (include transient methods) } Repository("thingRepository")

问题 I wonder if there is a way to retrieve a generated value from database as an extra column and map it to a transient value. I'll try to explain myself, I wish something like this: @Entity @Table(name = "thing") public class Thing { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "itemid") private Long itemId; private String someValue; @Transient private double distance; // constructors, getters, setters, etc.. (include transient methods) } Repository("thingRepository")

问题 Does the latest version of Spring Data (2.1.0.RELEASE or 3.0.0M1) support Elasticsearch 5.x? If not, When will it support it? There is no information about this in their docs: Spring Data Elasticsearch 回答1: Not support yet, you can try ES native java api. 回答2: Yes, now spring-data supports Elasticsearch v5.x. It's not supported with RELEASE version, it's supported with BUILD-SNAPSHOT version. To use it, you have to add repository URL as well. For maven project, build script will look

问题 Is there any Spring Annotation to Set Default value for a Field (Mongo) ? 回答1: No need for spring annotations, this should do the trick: import org.springframework.data.mongodb.core.mapping.Document; import org.springframework.data.mongodb.core.mapping.Field; @Document public class Doc { @Field private String field = "CustomDefaultValue"; } 来源： https://stackoverflow.com/questions/41344173/is-there-any-spring-annotation-to-set-default-value-for-a-field-mongo

问题 For Java enum type, I learn that there are two solutions for MongoDB: serialization and using Jackson’s ObjectMapper. Can the MongoRepository work with an enum data type with either of those approaches or I have to write a customized repository? 回答1: Yes, Spring Data MongoDB supports enums. Just use them in your domain model. 回答2: Spring Data Mongodb can serialize enum into string using enum's name as value. Let's say, it uses the second approach from the article http://www.vineetmanohar.com

问题 I'm working with Spring Data which is great stuff, but sometimes I need to get more data from database than my model can handle. For example I have model like below. @Entity @Table(name = "email") public class Mail implements Serializable { @Getter @Setter @GeneratedValue(strategy = GenerationType.IDENTITY) @Id private Long id; @Getter @Setter private String text; } An I my query will be more complex than usual. I want to get my model and in addition number of similar entities, using group by