spring-data-jpa

问题 I have created a pretty small and simple Spring Boot app using the Oracle database and some JPA queries. This is the code snippet which is not returning data, which is actually exists in database. letterRecipientNonOas = letterRecipientNonOasRepository .findById(Long.valueOf(letterRecipientDTO.getNonOas().getId())) .orElseThrow(() -> new EntityNotFoundException(LetterRecipientNonOas.class, Constant.MESSAGE_ENTITY_NOT_FOUND)); here findById is returning empty result set. this is my repository

问题 Below is application.properties file app.not.found=app with {0} name can not be found. How to replace {0} with some value in spring? I am using below code to read properties file values. env.getProperty("app.not.found") but not getting how to set placeholder values. 回答1: Use MessageFormat.format(String pattern, Object ... arguments) . It accepts an array in second parameter, which will replace 0, 1 , 2 ... sequentially. MessageFormat.format(env.getProperty("app.not.found"), obj) obj will

问题 Current apporach: application.properties spring.datasource.url=jdbc:mysql://localhost:3306/db_name spring.datasource.username=root spring.datasource.password=admin spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.testWhileIdle = true spring.datasource.validationQuery = SELECT 1 spring.jpa.show-sql = true spring.jpa.hibernate.ddl-auto=update spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy spring.jpa.properties.hibernate.dialect=org

问题 Error APPLICATION FAILED TO START Description: Field ProRepo in com.pvs.products.testservice.ProService required a bean named 'entityManagerFactory' that could not be found. The injection point has the following annotations: @org.springframework.beans.factory.annotation.Autowired(required=true) Action: Consider defining a bean named 'entityManagerFactory' in your configuration. Code build.gradle plugins { id 'org.springframework.boot' version '2.1.12.RELEASE' id 'io.spring.dependency

问题 JPA Specification is powerful in order to build WHERE clauses. But, it seems to be defined only for SELECT (with findAll method). Is it possible to have the same behavior with DELETE and UPDATE? So that, it would be possible to avoid selecting scope before deleting or updating it. Thx 回答1: You can use CriteriaUpdate and CriteriaDelete. Im building my specification from a RSQL query here but it can be done in a lot of other ways as well (see https://www.programcreek.com/java-api-examples/index

问题 JPA Specification is powerful in order to build WHERE clauses. But, it seems to be defined only for SELECT (with findAll method). Is it possible to have the same behavior with DELETE and UPDATE? So that, it would be possible to avoid selecting scope before deleting or updating it. Thx 回答1: You can use CriteriaUpdate and CriteriaDelete. Im building my specification from a RSQL query here but it can be done in a lot of other ways as well (see https://www.programcreek.com/java-api-examples/index

问题 I have a Spring Boot app which contains a Spring Data Jpa repository. I need to run a unit (or component?) test around this repository. I do not have a lot of experience with Spring Data Jpa. Here's my test. It's trivially simple, and I cannot get it to pass. import org.junit.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest; import static org.junit.Assert.assertNotNull; @DataJpaTest public class

问题 I'm having performance issues when querying ~12,000 user documents, indexed by 1 column, (companyId), no other filter. The whole collection only has ~27000. It took me about 12 seconds to get the ~12000 rows of data... I tried running explain for this query: db.instoreMember.find({companyId:"5b6be3e2096abd567974f924"}).explain(); result follows: { "queryPlanner" : { "plannerVersion" : 1, "namespace" : "production.instoreMember", "indexFilterSet" : false, "parsedQuery" : { "companyId" : { "$eq

问题 I'm having performance issues when querying ~12,000 user documents, indexed by 1 column, (companyId), no other filter. The whole collection only has ~27000. It took me about 12 seconds to get the ~12000 rows of data... I tried running explain for this query: db.instoreMember.find({companyId:"5b6be3e2096abd567974f924"}).explain(); result follows: { "queryPlanner" : { "plannerVersion" : 1, "namespace" : "production.instoreMember", "indexFilterSet" : false, "parsedQuery" : { "companyId" : { "$eq

问题 The project I'm working on was generated with JHipster with support for entity filtering, which uses Spring Data JPA Specifications under the hood. The model is as follows (in JDL): entity Student { name String } entity Course { name String } entity Enrollment { } entity Attendance { date LocalDate } relationship OneToMany { Student to Enrollment(student required), Course to Enrollment(course required), Enrollment to Attendance(enrollment required) } filter all service all with serviceClass