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(Quick Reference)

countBy*

Purpose

Dynamic method that uses the properties of the domain class to query for the count of the number of matching records

Examples

Given the domain class Book:

class Book {
    String title
    Date releaseDate
    String author
}

The following are all possible:

def c = Book.countByTitle("The Shining")
c = Book.countByTitleAndAuthor("The Sum of All Fears", "Tom Clancy")
c = Book.countByReleaseDateBetween(firstDate, new Date())
c = Book.countByReleaseDateGreaterThanEquals(firstDate)
c = Book.countByTitleLike("%Hobbit%")
c = Book.countByTitleNotEqual("Harry Potter")
c = Book.countByReleaseDateIsNull()
c = Book.countByReleaseDateIsNotNull()

Description

GORM supports the notion of Dynamic Finders. The countBy* method counts the number of records for the given expression

The following operator names can be used within the respective dynamic methods:

  • LessThan

  • LessThanEquals

  • GreaterThan

  • GreaterThanEquals

  • Between

  • Like

  • Ilike (i.e. ignorecase like)

  • IsNotNull

  • IsNull

  • Not

  • Equal

  • NotEqual

  • And

  • Or

These names can be considered keywords, and you will have problems when querying domain classes that have one of these names as a property name. For more information on dynamic finders refer to the user guide.