Grails命名查询-通过关联查找

Question

I want to create a named query that will find all objects of one class, based on a property (or properties) of child class properties.

I want to be able to find all Bars where Foo.me == "some string"

So, I have this, and it doesn't work:

class Foo {
    String me
}

class Bar {
    Foo foo

    static namedQueries = {
        findByFooMe { meStr ->
            eq(foo.me, meStr)
        }
    }
}

What does the correct syntax look like please? Also, how does it change if Bar hasMany Foos, and I want to find all Bars where one of its Foo,me properties is "search string"?

ie

class Bar {
    static hasMany [foos: Foo]
} 

Answer 1

While I wouldn't recommend using findBy as the prefix to a named query, you are close to having the right implementation. Here is an updated version with a new name for the query too.

static namedQueries = {
    locateByFooMe { meStr ->
        foo {
          eq('me', meStr)
        }
    }
}

If you change your relationship to a collection (One to Many) just make sure the property name foo (in this case) changes to whatever you change it to ( foos in your question) and the above query will still continue to work.