//Domain Class
package com.example
class Foo {
    String name
}

//Controller
package com.example
class FooController {
    def index() {
    def results = Foo.withCriteria {
        like("name", '%' + params.name + '%')
    }
    render results
    }
}

//BootStrap
def init = { servletContext ->
    def foo1 = new Foo(name: "FooEntity1")
    foo1.id = 1

    def foo2 = new Foo(name: "FooEntity2")
    foo2.id = 2

    def foo3 = new Foo(name: "FooEntity3")
    foo3.id = 3

    [foo1, foo2, foo3]*.save(flush: true)
    }