mongodb - grails，mongodb gorm，null嵌入式对象

Question

我有两个简单的域类:

class Isa95EquipmentSpecification {

    String equipmentClass
    String equipment
    String description
    Float quantity
    String quantityUOM
    List<Isa95EquipmentSpecificationProperty> equipmentSpecificationProperties

    static embedded = ['equipmentSpecificationProperties']

    static constraints = {
        equipment nullable: true, validator: {val, obj -> if (null == val && null ==    obj.equipmentClass) return ['bothNullable']}
        equipmentClass nullable: true, validator: {val, obj -> if (null == val && null == obj.equipment) return ['bothNullable']}
        description nullable: true
        quantity nullable: true
        quantityUOM nullable: true  
    }
}

和子域:

class Isa95EquipmentSpecificationProperty {
    String name
    String description
    String value
    String valueUOM
    Double quantity
    String quantityUOM

    static constraints = {
        name nullable: false
        description nullable: true
        value nullable: false
        valueUOM nullable: false
        quantity nullable: true
        quantityUOM nullable: true
    }
}

我希望建立一个包含嵌入式属性的组合文档，我可以保存它，只在父级上运行一次save()操作，但它不起作用。

我尝试在grails控制台上运行:

    def prop1 = new isa95.productdefinition.Isa95EquipmentSpecificationProperty(name: 'prop-1', value: 'mad', valueUOM: '-')
def prop2 = new isa95.productdefinition.Isa95EquipmentSpecificationProperty(name: 'prop-2', value: 12.32, valueUOM: 'kilograms')
def spec = new isa95.productdefinition.Isa95EquipmentSpecification(equipment: '41500', description: 'eq-test', equipmentSpecificationProperties: [prop1, prop2])
spec.save(failOnError: true)

该脚本可以正确运行，但是在数据库中我发现了这一点。我希望找到用嵌套列表填充的equipmentSpecificationProperies:

{ "_id" : NumberLong(9), "description" : "eq-test", "equipment" : "14500", "equipmentSpecificationProperties" : [ null, null ], "version" : 0 }

Answer 1

指定列表类型:

List<Isa95EquipmentSpecificationProperty> equipmentSpecificationProperties