class Book {
   String title
   Date releaseDate
   String author
   static constraints = {
      releaseDate nullable: true
   }
}findAllWhere
Purpose
Uses named arguments corresponding to property names of the domain class to execute a query returning all matching results.
Examples
Given the domain class:
You can query in the form:
def books = Book.findAllWhere(author: "Stephen King", title: "The Stand")
def unreleasedBooks = Book.findAllWhere(releaseDate: null)Description
Parameters:
- 
queryParams- A Map of key/value pairs to be used in the query