I have a transaction class which stores the each transaction of a customer,Following are the fields in this class.
class Transaction{
#Id
private String id;
private Date date;
private String customerId;
private double openBalance;
private double transctionAmount;
private double finalAmount;
}
I need to fetch only the last inserted record of a customer (let say for customerId = cust123).
I defined following function in repository.
public interface TranscationRepository extends MongoRepository<Transaction, String> {
Optional<Transaction> findTopByCustomerIdOrderByIdDesc(String id);
}
This method giving last entry not by customerId but overall. I tried few modifications to it but did not get success.
I know I can findAllByCustomer but I don't want to pull huge list of transaction which is of no use in this use case. What is correct signature in spring mongo to get last inserted record by a field? I am ok to use custom #Query also.
Thank you.
Related
I am writing an API where I am inserting a record into a table (Postgres). I was hoping to use JPA for the work. Here is the potential challenge: the primary key for the insert is generated from a database trigger, rather than from sequence count or similar. In fact, the trigger creates the primary key using the values of other fields being passed in as part of the insert. So for example,
if I have a entity class like the following:
#Entity
#Validated
#Table(name = "my_table", schema="common")
public class MyModel {
#Id
#Column(name = "col_id")
private String id;
#Column(name = "second_col")
private String secCol;
#Column(name = "third_col")
private String thirdCol;
public MyModel() {
}
public MyModel(String id, String secCol, String thirdCol) {
this.id = id;
this.secCol = secCol;
this.thirdCol = thirdCol;
}
}
I would need the col_id field to somehow honor that the key is generated from the trigger, and the trigger would need to be able to read the values for second_col and third_col in order to generate the primary key. Finally, I would need the call to return the value of the primary key.
Can this be done with jpa and repository interface such as:
public interface MyRepo extends JpaRepository <MyModel, String> {
}
and then use either default save method such as myRepo.saveAndFlush(myModel) or custom save methods? I can't find anything on using JPA with DB triggers that generating keys. If it cannot be done with JPA, I would be grateful for any alternative ideas. Thanks.
ok, I was able to get this to work. It required writing a custom query that ignored the primary key field:
public interface MyRepo extends JpaRepository <MyModel, String> {
#Transactional
#Modifying
#Query(value = "INSERT INTO my_table(second_col, third_col)", nativeQuery = true)
int insertMyTable(#Param("second_col") String second_col, #Param("third_col") String third_col);
}
The model class is unchanged from above. Because it was executed as a native query, it allowed postGres to do its thing uninterrupted.
I need help to get the data from another document I have the following class.
#Data
#Document(collection = "tmVersion")
public class TmVersion {
#Id
private String id;
private String cVrVersionId;
#DBRef
private TaApplicationVersion taApplicationVersion;
}
and
#Data
#Document(collection = "taApplicationVersion")
public class TaApplicationVersion {
#Id
private String id;
private String dVrAppName;
private String dVrAppCode;
}
This is my repository in which I map what I want to be shown but in taApplicationVersion I need to show all this object also how is it done?
#Query(value="{}", fields="{'cVrVersionId': 1, 'taApplicationVersion.dVrAppName': 2,
'dVrVersionNumber': 3}")
Page<TmVersion> getAllVersionWithOutFile(Pageable pageable)
Couple of things to mention here.
If you want this kind of join between tables, then you need to rethink your choice of Mongodb as database. No Sql Databases thrive on the fact that there is very less coupling between tables(collections). So if you are using #DBRef, it negates that. Mongodb themselves do not recommend using #DBRef.
This cannot be achieved with the method like you have in the repository. You need to use Projections. Here is the documentation for that.
Create a Porjection interface like this. Here you can control which fields you need to include in the Main class(TmVersion)
#ProjectedPayload
public interface TmVersionProjection {
#Value("#{#taApplicationVersionRepository.findById(target.taApplicationVersion.id)}")
public TaApplicationVersion getTaApplicationVersion();
public String getId();
public String getcVrVersionId();
}
Change the TmVersionRepository like this
public interface TmVersionRepository extends MongoRepository<TmVersion, String> {
#Query(value="{}")
Page<TmVersionProjection> getAllVersionWithOutFile(Pageable pageable);
}
Create a new Repository for TaApplicationVersion. You can add #Query on top of this method and control which fields from subclass needs to be returned.
public interface TaApplicationVersionRepository extends MongoRepository<TaApplicationVersion, String> {
TaApplicationVersion findById(String id);
}
I want to update a MongoDB document containing a dbrf lazy attribute using spring data.
First of all, I load the existing document, I change the attributes I want and after that, I call #Repository save method, but when I check the document in MongoDB the dbrf lazy attribute is null.
I tried to load the attribute before by calling getAttribute, but that doesn't fix the problem.
Someone could help me?
Thanks
I have the Collection below:
#Data
#Document(collection = "calendriers")
public class CalendrierEntity {
#Id
#AutoGenerate(SequanceKey.CALENDRIER)
private Long id;
#NotNul
private String label;
#NotNull
private HorairesEntity horairesEntity;
#DBRef(lazy = true)
#CascadeSave
#Getter(AccessLevel.NONE)
private List<AbsenceEntity> absenceEntities;
}
and the repository bellow :
#Repository
public interface AbsenceRepository extends MongoRepository<CalendrierEntity, Long> {
AbsenceEntity findById(Long enfantId, LocalDate localDate);
}
I have calendrier document with Id 1L and want to update his label.
The calendrier document have allready a list of Absences.
this my code to update the label.
#Transactional
public void updateLabelCalendrier(Long id, String label){
CalendrierEntity calendrier = calenderRepository.findById(1L);
calendrier.setLabel(label);
calenderRepository.save(calendrier);
}
but when i check data in mongodb, i have the new label but my list of absences became null.
I'm trying to set up a dropwizard project but I'm stuck. When I try to get the auto generated id field with #GetGeneratedKeys then I'm getting the following Exception:
org.postgresql.util.PSQLException: Bad value for type long : foo.
The request is a simple JSON Request
{"name":"foo"}
The INSERT into the database is successful but it seems that the statement returns the value of the name instead of the generated id. How can I solve this?
I use postgresql, and the table project contains a primary key field "id" with nextval('project_id_seq'::regclass). Here are the POJO, DAO and Resource Classes I use:
public class Project {
private long id;
private String name;
public Project() { // Jackson deserialization }
public Project(long id, String name) {
this.id = id;
this.name = name;
}
...
}
#RegisterMapper(ProjectMapper.class)
public interface ProjectDAO {
#SqlUpdate("insert into project (name) values (:name)")
#GetGeneratedKeys
public long insert(#Bind("name") String name);
}
#Path("/project")
#Consumes({MediaType.APPLICATION_JSON})
#Produces({MediaType.APPLICATION_JSON})
public class ProjectResource {
ProjectDAO projectDAO;
public ProjectResource(ProjectDAO personDAO) {
this.projectDAO = personDAO;
}
#POST
#Timed
public Response add(#Valid Project project) {
long newId = projectDAO.insert(project.getName());
project.setId(newId);
return Response.status(Response.Status.CREATED)
.entity(project).build();
}
}
===============
UPDATE
I just figured out that this relates to the fact that my id column isn't the first column in my table. The column name is. The problem occurs because #GetGeneratedKeys is using org.skife.jdbi.v2.sqlobject.FigureItOutResultSetMapper which is using org.skife.jdbi.v2.PrimitivesMapperFactory which returns org.skife.jdbi.v2.util.LongMapper.FIRST. This mapper is calling
java.sql.ResultSet.getLong(1) through the method extractByIndex(...) to retrieve the generated id, which isn't the id in my case...
I'll fix the issue by reorganizing the columns in the database, but I'd like to have a robust implementation if possible: Is there a way to specify the column name of the id column when using the #GetGeneratedKeys Annotation? (The org.skife.jdbi.v2.util.LongMapper class contains a also method called extractByName(...))
This is an issue in the jdbi implementation and is fixed in a newer version as described in https://github.com/jdbi/jdbi/issues/114
I am working with Spring MongoDb.
I create various entities using insert method:
http://docs.spring.io/spring-data/mongodb/docs/current/api/org/springframework/data/mongodb/core/MongoOperations.html#insert-java.lang.Object-
However, all methods return void. I need to return the ObjectId of the inserted document.
What is the best way to get it?
This is pretty interesting and thought I would share. I just figured out the solution for this with the help of BatScream comment above:
You would create an object and insert it into your MongoDB:
Animal animal = new Animal();
animal.setName(name);
animal.setCat(cat);
mongoTemplate.insert(animal);
Your animal class looks like this with getters and settings for all fields:
public class Animal {
#Id
#JsonProperty
private String id;
#JsonProperty
private String name;
#JsonProperty
private String cat;
public String getId() {
return id;
}
}
AFTER you have done the insert under mongoTemplate.insert(animal);, you can actually call the method animal.getId() and it will return back the ObjectId that was created.
I had the same problem with #AlanH that animal.getId() is null. And then I just realized my id field had been set as a final field with a wither method. So of course getId() is null since the id field is immutable and the wither method returns a new object with id.
if this is the case: use animal = template.insert(animal).