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Editorial Team
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Asked: 2026-06-09T02:32:12+00:00

I am trying to have a consistent db where the username and email are

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I am trying to have a consistent db where the username and email are unique.

http://www.mongodb.org/display/DOCS/Indexes#Indexes-unique%3Atrue

http://code.google.com/p/morphia/wiki/EntityAnnotation

My user class looks like this:

public class User {
    @Indexed(unique = true)
    @Required
    @MinLength(4)
    public String username;

    @Indexed(unique = true)
    @Required
    @Email
    public String email;

    @Required
    @MinLength(6)
    public String password;

    @Valid
    public Profile profile;

    public User() {
...

I used the @Indexed(unique=true) annotation but it does not work. There are still duplicates in my db.

Any ideas how I can fix this?

Edit:

I read about ensureIndexes but this seems like a wrong approach, I don’t want to upload duplicate data, just to see that its really a duplicate.

I want to block it right away.

somthing like

try{

ds.save(user);
}
catch(UniqueException e){
...
}
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1 Answer

  1. Editorial Team

    There is good explanation about unique constraint right here Unique constraint with JPA and Bean Validation , does this help you at all? So what I would do is just to validate your data at controller level (or bean validate()) when checking other errors as well. That will do the job, but its not as cool than it would be with annotation.

    Edit

    Alternatively see this post Inserting data to MongoDB – no error, no insert which clearly describes that mongodb doesn’t raise error by default of unique indexes if you don’t tell it so, try configuring your mongodb to throw those errors too and see if you can work on with solution 🙁

    Edit 2

    It also crossed my mind that play 2 has a start up global class where you could try to access your database and run your indexed column commands like this db.things.ensureIndex({email:1},{unique:true}); ?? see more at http://www.playframework.org/documentation/2.0/JavaGlobal

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