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node.js - 如何在@hapi/joi 中设置自定义错误消息？

问题描述

我使用 Joi 创建了以下 Schema 进行验证：

const createProfileSchema = Joi.object().keys({
  username: Joi.string()
    .required()
    .message("username is required")
    .empty()
    .message("username is not allowed to be empty")
    .min(5)
    .message("username must be greater than 5 characters")
    .max(20)
    .message("username must be less than 5 characters")
});

但它会引发流动错误：

 Cannot apply rules to empty ruleset or the last rule added does not support rule properties

      4 |   username: Joi.string()
      5 |     .required()
    > 6 |     .message("username is required")
        |      ^
      7 |     .empty()
      8 |     .message("username is not allowed to be empty")
      9 |     .min(5)

实际上，我想为每个单独的错误案例设置一条自定义消息。

标签： node.jsvalidationexpressjoi

解决方案

您可以使用最新版本的 @hapi/joi 包尝试类似的操作。

const Joi = require("@hapi/joi");

const createProfileSchema = Joi.object().keys({
  username: Joi.string()
    .required()
    .empty()
    .min(5)
    .max(20)
    .messages({
      "string.base": `"username" should be a type of 'text'`,
      "string.empty": `"username" cannot be an empty field`,
      "string.min": `"username" should have a minimum length of {#limit}`,
      "string.max": `"username" should have a maximum length of {#limit}`,
      "any.required": `"username" is a required field`
    })
});

const validationResult = createProfileSchema.validate(
  { username: "" },
  { abortEarly: false }
);

console.log(validationResult.error);

详细信息可以在文档中找到：

https://github.com/hapijs/joi/blob/master/API.md#list-of-errors

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