Hi Friends,
I was going through grails docs, encountered a method called load(), found it really useful thought would share with you. What load() does is, it creates a proxy object and doesn’t retrieve the record from the database until property other than id is accessed.
Let us consider a scenario, where we have id of a Object “subject” and students of that subject needs to be listed. So we would generally do something like as given below:
Subject subject = Subject.get(subjectId) Student.findBySubject(subject)
In the above code, we had to load subject unnecessarily where its ‘id’ should have been sufficient. Now, with load no extra queries are required.
Subject subject = Subject.load(subjectId) //creates a proxy object, not retrieved from database Student.findBySubject(subject)
And same when used with criteria queries
Student.list{ eq('subject', Subject.load(subjectId)) ... }
Thanks to the grails development team for all their efforts!
Cheers!!
~~Amit Jain~~
amit@intelligrape.com
http://www.IntelliGrape.com
Do you know if this works with Grails version 1.2.x? I got a compilation failure when trying to do this even though it seems that the method exists. Thanks for a great article.
Thanks Chris. I couldn’t find load() in grails docs for grails version 1.2.x. I believe it was introduced in 1.3.x version.
Another reason for us to upgrade to 1.3.x. Gonna have to bite the bullet soon.
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I really think this is a vital information for me. I should bookmark to your news feed. Thansk.