【问题标题】:Joi field validation base on a set of values of another fieldJoi 字段验证基于另一个字段的一组值
【发布时间】:2020-09-06 18:30:46
【问题描述】:

我正在尝试根据另一个字段的一组值来验证对象中的字段。假设我的对象有字段field1field2。字段一可以取值 A、B、C、D、E、F、H、I。现在说如果字段 1 是任何值; A、B、C、H,则 field2 应为空。我该怎么做呢。 我认为它应该有下面的合成器,但我不知道如何完全实现它。

const mySchema = Joi.object({
   field1: Joi.string().valid('A','B','C','D','E','F','H','I').required(),
   field2: Joi.when('field1', is: <A or B or C or H> then: <field2 should be null> otherwise: Joi.date().required())
});

注意:我正在使用"@hapi/joi": "^17.1.1"

【问题讨论】:

    标签: node.js express validation switch-statement joi


    【解决方案1】:

    我终于通过尝试得到了它:

    const Joi = require("@hapi/joi");
    
    const schema = Joi.object({
        field1: Joi.string().valid('A', 'B', 'C', 'D', 'E', 'F', 'H', 'I').required(),
        field2: Joi.when('field1', {
            is: Joi.string().valid('A', 'B', 'C', 'H'),
            then: Joi.valid(null),
            otherwise: Joi.date().required(),
        }),
    });
    
    const validation = [schema.validate({ field1: 'B', field2: null }), schema.validate({ field1: 'E', field2: null }),
                        schema.validate({ field1: 'E', field2: Date() }), schema.validate({ field1: 'A', field2: Date() })];
    
    validation.forEach((v)=>{
        if(v.error){
            console.log(JSON.stringify(v.error));
        }else{
            console.log(JSON.stringify(v.value));
        }
    });
    

    这是输出。

    {"field1":"B","field2":null}
    {"_original":{"field1":"E","field2":null},"details":[{"message":"\"field2\" must be a valid date","path":["field2"],"type":"date.base","context":{"label":"field2","value":null,"key":"field2"}}]}
    {"field1":"E","field2":"2020-05-20T12:26:48.000Z"}
    {"_original":{"field1":"A","field2":"Wed May 20 2020 13:26:48 GMT+0100 (West Africa Standard Time)"},"details":[{"message":"\"field2\" must be [null]","path":["field2"],"type":"any.only","context":{"valids":[null],"label":"field2","value":"Wed May 20 2020 13:26:48 GMT+0100 (West Africa Standard Time)","key":"field2"}}]}
    

    【讨论】:

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