(Quick Reference)
findBy*
目的
Purpose
Dynamic method that uses the properties of the domain class to execute a query returning the first matching result.
使用例
Examples
Given the domain class
Book:
class Book {
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%") // ignores case
b = Book.findByTitleNotEqual("Harry Potter")
b = Book.findByReleaseDateIsNull()
b = Book.findByReleaseDateIsNotNull()
b = Book.findPaperbackByAuthor("Douglas Adams")
b = Book.findNotPaperbackByAuthor("Douglas Adams")
b = Book.findByAuthorInList(["Douglas Adams", "Hunter S. Thompson"])詳細
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:
LessThanLessThanEqualsGreaterThanGreaterThanEqualsBetweenLikeIlike (i.e. ignorecase like)IsNotNullIsNullNotNotEqualAndOrInList
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.
