Question

是否有办法根据用户点击的控制器操作强制使用域字段？

示例：

class Color {

  String name
  String shade

  static constraints{
    name nullable: true, blank: true
    shade nullable: true, blank: true
  }
}

class MyController {

  def save1() {
    //here I want only name field to be required
    Color c = new Color(params)
    c.save()
  }

  def save2() {
    //here I want only shade field to be required
    Color c = new Color(params)
    c.save()
  }
}

Answer 1

你有一个选择是这样的：

class MyController {

    def save1() {
        //here I want only name field to be required
        def color = new Color(params)
        if(color.validate(['name'])) {
            color.save(validate: false)
        }
    }

    def save2() {
        //here I want only shade field to be required
        def color = new Color(params)
        if(color.validate(['shade'])) {
            color.save(validate: false)
        }
    }
}

Answer 2

您可以使用CommandObject并在那里定义自己的约束

请参阅http://grails.org/doc/latest/guide/theWebLayer.html#commandObjects

e.g：

@grails.validation.Validateable
class ColorWithName {
    String name
    String shade

    static constraints = { 
        name(nullable: false, blank: false)
    } 
}

class ColorController {

    def save1(ColorWithName color) {
    if (color.hasErrors()) { ...

如何根据控制器操作强制域的字段？

2 个答案: