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How to create and handle composite primary key in JPA
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You can make an Embedded class, which contains your two keys, and then have a reference to that class as EmbeddedId in your Entity.
You would need the @EmbeddedId and @Embeddable annotations.
@Entity
public class YourEntity {
@EmbeddedId
private MyKey myKey;
@Column(name ...
How do I use disk caching in Picasso?
I am using Picasso to display image in my android app:
9 Answers
9
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List of standard lengths for database fields
I'm designing a database table and once again asking myself the same stupid question: How long should the firstname field be?
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How to convert ‘false’ to 0 and ‘true’ to 1 in Python
Is there a way to convert true of type unicode to 1 and false of type unicode to 0 (in Python)?
7 Answers
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
...meone give me a quick summary of what a ViewModelLocator is, how it works, and what the pros/cons are for using it compared to DataTemplates?
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LINQ Contains Case Insensitive
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No, but databases work off of character sets and collation. If you're trying to push off work to the database, you have to make some assumptions about character set and collation, right?
– Christopher Stevenson
Mar 28 '13 at 12:17
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Another Repeated column in mapping for entity error
...lumn in the mapping. That means you mapped the same database column twice. And indeed, you have:
@Column(nullable=false)
private Long customerId;
and also:
@ManyToOne(optional=false)
@JoinColumn(name="customerId",referencedColumnName="id_customer")
private Customer customer;
(and the same goes...
“A project with an Output type of Class Library cannot be started directly”
I downloaded a C# project and I wish to debug the project to see how an algorithm implementation works.
12 Answers
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How to install a plugin in Jenkins manually
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Yes, you can. Download the plugin (*.hpi file) and put it in the following directory:
<jenkinsHome>/plugins/
Afterwards you will need to restart Jenkins.
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Difference between and
What is the difference between HTML <input type='button' /> and <input type='submit' /> ?
8 Answers
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