Grails Many to Many Association Querying

Question

I have a many to many relationship.

class Post {
    String title
    static hasMany = [tags:Tag]
}

class Tag {
    static hasMany = [posts:Post]
}

I would like to get a list of posts for a tag that have some other criteria (like a sort order, partial title match, etc). Do I have to use the grails criteria to achieve this? Or is there some way to do something like this:

Post.findAllByTitleLikeAndTagsContains("partial title", aTag)

Answer 1

I don't think dynamic finders will allow you to get into one to many or many to many associations - you have to do a criteria or go the HQL query route. You can only query by one to one association, not by one to many. (see section 5.4.1 Dynamic Finders)

Answer 2

You can use withCriteria,for example:

Post.withCriteria{
    tags {
        eq 'id',aTag.id
    }
 }