Sometimes you need to use several attributes of an entity to design your DB primary key.

JPA composite key serves that purpose.

Let's see how to implement such composite key !

1️⃣ 𝐘𝐨𝐮 𝐝𝐞𝐟𝐢𝐧𝐞 𝐭𝐡𝐞 𝐂𝐨𝐦𝐩𝐨𝐬𝐢𝐭𝐞 𝐊𝐞𝐲🔑 𝐂𝐥𝐚𝐬𝐬 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐢𝐝:

2️⃣ 𝐘𝐨𝐮 𝐮𝐬𝐞 𝐢𝐭 𝐚𝐬 𝐢𝐝🆔 𝐢𝐧 𝐲𝐨𝐮𝐫 𝐞𝐧𝐭𝐢𝐭𝐲:

3️⃣ 𝐘𝐨𝐮 𝐟𝐢𝐧𝐚𝐥𝐥𝐲 𝐦𝐚𝐤𝐞 𝐲𝐨𝐮𝐫 𝐜𝐚𝐥𝐥𝐬📞 𝐭𝐨 𝐭𝐡𝐞 𝐫𝐞𝐩𝐨𝐬𝐢𝐭𝐨𝐫𝐲: