unique « Field « JPA Q&A

1. How to get a unique key for two fields with Hibernate? stackoverflow.com

I have two fields of an entity class which I don't want to be unique but to instead be used as composite fields for a key which must itself be unique. ...

2. Data not getting from table on foreign key on unique field stackoverflow.com

I have table mwallet_terminal_store_mapping in which tid (character varing) is the primary key and foreign key referring to a column tid in terminal_master. In terminal_master, tid (which is character varing)is ...

3. Hibernate - update specific field with unique id coderanch.com

Hi, I want to fire query using Hibernate to update specific field. Here, I dont have object in the memory so, other fields will have null value. If I try SaveOrUpdate() call then it will overwrite null values to other fields. I can retrieve the object, populate it and then fire saveOrUpdate() but this looks me inefficient. I can use SQL ...

4. Duplicate Entry On Unique Field - Best Practice forum.hibernate.org

I'm trying to figure out what the best way to report to the user that the object they are trying to save violates a unique column constraint on the table. Right now, if I try to save a new object with a duplicate value, I get an SQLException wrapped in a hibernate.JDBCException. The error message in the SQLException is: "Duplicate entry ...

5. Best way to prevent a duplicate reccord in a unique field forum.hibernate.org

Hi! I'm new to Hibernate and wonder if any one have a suggestive way to deal with duplicated reccords for databasefields with unique properties. e.g a username field. I'm writing a webapplicatin that (among other things :) simply inserts new Users. Now, what would be the best practice to handle the exception that occures if someone tries to insert a duplicate ...

6. specifying unique but NOT case-sensitive string field forum.hibernate.org

7. Unique combination of fields forum.hibernate.org

Hi, I have two domain classes, Item and Feed, and each Feed might have many items and each item only belongs to one feed. Here's the definition of Item: Code: ...

8. How to deal with duplicate unique fields? forum.hibernate.org

What is the best way to deal with potential duplicate fields being inserted into a table where that is not allowed? For example: CREATE TABLE Person (Id INT, Name VARCHAR(255), Email VARCHAR(255), UNIQUE (Email)); Then we try to save 2 different Person objects with the same email: session.save(new Person("John", "a@b.com")); session.save(new Person("Adam", "a@b.com")); I will, of course, get an exception. It's ...