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Editorial Team
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Asked: 2026-05-24T06:21:01+00:00

For more dynamism, I would like to add a random part on my app.

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For more dynamism, I would like to add a random part on my app.
Here is what I would have done in other techs, and what is not working in play : 

long id = JPA.execute("select id from Realisation r order by RANDOM() LIMIT 1");

And here is the stack :

unexpected token: LIMIT near line 1, column 55

Comments :

  • Either in app or database, makes no difference to me.
  • About hundred “realisations” in database.
  • All I need is there ID, no need for full object.
  • MySQL database behind it all.

EDIT

After a little investigation, here is how I’ve done it :

  • Define jpa.dialect in application.conf : jpa.dialect=org.hibernate.dialect.MySQLDialect
  • Fetch a complete object instead of just id with classic Model utilities :

Realisation r = Realisation.find("order by RAND()").first();

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1 Answer

  1. Editorial Team

    After a little investigation, here is how I’ve done it. Define jpa.dialect in application.conf :

    jpa.dialect=org.hibernate.dialect.MySQLDialect

    Fetch a complete object instead of just id with classic Model utilities :

    Realisation r = Realisation.find("order by RAND()").first();

    Not the best way possible, since I only need the ID and not the complete object. Anyway, I have no other solution. If anyone has one for just the ID I will take it.

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