I am trying to perform a read operation on my PostgreSQL database. I am using SpringTemplate and I am passing dynamic parameters to it. “SELECT id, name FROM Student WHERE id IN :id” Here, id=(1,2,3,4,5…) What is the maximum number of elements I can pass in ID without breaking my JDBC connection and for the operation to work smoothly? Answer
Tag: spring
Spring boot delete object from database based on a OneToOne relationship
i’ve got an “appointment” entity object(table) AND dates_doctor_available entity build like this AND now i wish from a controller to remove the Database entry based on the “date_time_available_fk” Using “Appointment” object. For example something like where inside service there is a data object access something like this(they are interfaces) where id is the date_time_available_fk number i want to pass(i already
Why spring validator is not working in this Api?
I have written a basic simple API of students data and added few validations using Hibernate validator but everytime its returning 0 errors. Here’s the code: pom.xml student.java Controller.java I am testing it using postman,My request body: In every request,even if name is empty Its returning 0 errors. Can someone help? Thanks in advance. Answer you need to add starter
Spring Data Elasticsearch Class Cast exception on Named Query
I’m getting the following exception when trying to use a named query with Spring Data Elasticsearch. The query I’m trying to make is: If I do not use the @Query annotation and instead let Spring derive the query from the method name like so: It works as expected. However, the PlayerNumber field is a @MultiField that supports the the field
Spring Hibernate SQL Server – problem in updating columns
I get the below error while not updating the mentioned column at all. I only update two another columns that one of them is used to compute the column “Available”. The column “Available” cannot be modified because it is either a computed column or is the result of a UNION operator. I also used native query (as below) to be
Sending messages from Java to RabbitMQ using com.rabbitmq.http.client.Client
I’m trying to send messages from a Java service to RabbitMQ. I’m using some Java RabbitMQ client library and trying to run the following code: In the last line (Client objectinitialization), the following error is thrown: java.lang.NoClassDefFoundError: org/springframework/http/converter/json/Jackson2ObjectMapperBuilder I think I might be missing something in my pom.xml or maybe something with the version of Spring. However, I have not
@PreAuthorize stops propagating exceptions thrown during evaluation of security checks
I have a controller with several endpoints. Every endpoint is mapped to a service which could return 200 or throw an exception, that is then handled and will return the correct error message. For example, if a user is not found I throw a UserNotFoundException, which is then caught in the ControllerAdvisor that maps it in a 404 not found.
Why users are not displayed from the database?
I can’t get a list of users from the database.I am assuming userService.allUsers () = null. But why? I have no idea. Since there are users in the database. Please tell me what is wrong with my code? It does not give me any errors in the logs. AdminController Class UserService ForAdmin.html I do not even understand why nothing is
Spring Batch avoid launch Reader and Writer before tasklet
I’m working with spring batch and have a job with two steps the first step (tasklet) validation the header CSV and the second step reads an CSV file and Write to another CSV file like this: I used a FlatFileItemReader (in ClassitemReader) and a FlatFileItemWriter (in ClassiItemWriter), before reading CSV. I checked if the header of CSV file is correct
Spring boot app stops with UnknownContentTypeException when trying to return JSON response from endpoint
I am trying to make a Spring boot app that uses the API endpoints of SWAPI and refine the results to some of them. To explain better I want to take the name of a character the user provided from a GET request and return to him the Starships this character has piloted. I am trying to use RestTemplate to