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Editorial Team
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Asked: 2026-05-22T23:17:07+00:00

Imagine I have something like this: def example = { def temp = ConferenceUser.findAllByUser(User.get(session.user))

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Imagine I have something like this:

def example = {
   def temp = ConferenceUser.findAllByUser(User.get(session.user))
   [temp: temp]
}

Explaining my problem:
Although dynamic finders are very easy to use and fast to learn, I must replace dynamic finders of my website for sql queries because it is a requirement. As I don’t understand SQL that much, my main questions are:

a) I am using an SQLS database, with the drivers and datasource good configured and my website works as it is right now. If I want to replace the “findAllByUser” for an sql statement, should i do something like this:

def dataSource
...
def db = new Sql(dataSource)
def temp = db.rows("SELECT ... ")

b) And that will work? I mean, the temp object will be a list as it is if I use “findAllByUser”, and do I need to open a connection to the database =?

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1 Answer

  1. Editorial Team

    yes, with grails you can do both plain sql and hql queries. HQL is ‘hibernate query language’ and allows you to write sql-like statements, but use your domain classes and properties instead of the table names and column names. To do an hql query, do something like

    def UserList = ConferenceUser.executeQuery('from ConferenceUser cu where cu.user = ?', [user]),

    what you have here is a parameterized query — executeQuery sees the ? in the hql string and substitutes the arguments in the array that is the second parameter to the method([user] in this case) for you.

    See
    http://grails.org/doc/latest/ref/Domain%20Classes/executeQuery.html

    and you can see this on how to do sql queries with Grails

    Sql query for insert in grails

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