grails - How to compare collection item using createCriteria? -

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registration domain has collection of discounts. 

static hasmany = [ discounts: discount]

i want extract registrations have particular discount applied.

in following code want registrations collection has discount of id disid. how can achieve that? appreciate help!

def disid = discount.get(1).id  def regs = registration.createcriteria().list(){              eq('compositeevent', cod.compositeevent)  }

try this:

def disid = discount.get(1).id  def regs = registration.withcriteria() {     discounts  {         eq 'id', disid     } }

see http://emmanuelrosa.com/articles/gorm-for-sqladdicts-where-clause/


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