grails - Grails GORM:常规 map

Question

具有以下域类:

class Word {
    Map translations
    static hasMany = [translations: String]

    String toString(){
        id
    }
}

还有一些保存在grails bootstrap 中的实例:

def word1 = new Word(translations: [en:"game"]);
word1.save(failOnError: true, flush: true)

def word3 = new Word(translations: [en:"gate"]);
word3.save(failOnError: true, flush: true)

def word2 = new Word(translations: [en:"life"]);
word2.save(failOnError: true, flush: true)

无法正确获取 translations字段。例如:

//input
println Word.findAll().each {
    println it.translations
}
//output
[:]
[:]
[:]
[1, 2, 3]

怎么了？

Answer 1

医生说:

如果您想要一个简单的字符串/值对映射，GORM可以使用以下内容进行映射:

class Author {
    Map books // map of ISBN:book names
}
def a = new Author()
a.books = ["1590597583":"Grails Book"]
a.save()