# findBy*

## Purpose

Dynamic method that uses the properties of the domain class to allow the creation of Grails query method expressions that return the first result of the query

## Examples

Given the domain class `Book`:

    class Book {
       Long id
       Long version
       String title
       Date releaseDate
       String author
       Boolean paperback
    }

The following are all possible:

    def b = Book.findByTitle("The Shining")
    b = Book.findByTitleAndAuthor("The Sum of All Fears", "Tom Clancy")
    b = Book.findByReleaseDateBetween(firstDate, new Date())
    b = Book.findByReleaseDateGreaterThanEquals(firstDate)
    b = Book.findByReleaseDateLessThanEquals(firstDate)
    b = Book.findByTitleLike("%Hobbit%")
    b = Book.findByTitleIlike("%Hobbit%") // (since 0.5) - ignorecase
    b = Book.findByTitleNotEqual("Harry Potter")
    b = Book.findByReleaseDateIsNull()
    b = Book.findByReleaseDateIsNotNull()
    b = Book.findPaperbackByAuthor("Douglas Adams")
    b = Book.findNotPaperbackByAuthor("Douglas Adams")

## Description

GORM supports the notion of Dynamic Finders. The `findBy*` method finds the first result for the given method 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`
- `NotEqual`
- `And`
- `Or`

The above operator names can be considered keywords, and you will run into problems when querying domain classes that have one of these names used as property names. For more information on dynamic finders refer to the user guide.