用于语言的嵌套类型 Schema MongoDB答案

【问题标题】：Nested type Schema MongoDB for languages用于语言的嵌套类型 Schema MongoDB
【发布时间】：2020-12-14 13:07:49
【问题描述】：

我正在创建一个 MongoDB 数据库，其中模型的一些信息将取决于指示语言的配置文件。因此，我将架构用作 LanguageSchema 的一种类型（在底部）并在类型声明中使用，但在运行它时出现类型未定义的错误。

const Schema = mongoose.Schema;
import {LanguagesSchema } from '../config/menutApi.config';

const sectionSchema = new Schema({
    title: { type: LanguagesSchema},
    content: { type: LanguagesSchema},
    image: { type: Schema.Types.String, default: 'image.jpg' },
    gallery: {type: Schema.Types.ObjectId, ref:'Gallery'}
}, { versionKey: false, _id: false });

const ArticleSchema = new mongoose.Schema({
  name: { type: LanguagesSchema },
  tags: { type: [ LanguagesSchema], index: true }, // field level,
  slug: { type: LanguagesSchema, required:true},
  sections: {type: [sectionSchema]}
},{ timestamps: true });


module.exports.getArticleById = function (id: any , callback: any) {
  article_model.findById(id, callback)
}
//Creating our model
export const article_model = mongoose.model("Article", ArticleSchema);

作为 LanguageSchema 这个：

const Schema = mongoose.Schema;
export const LanguagesSchema = new Schema({
        esp: { type: Schema.Types.String}, 
        cat: { type: Schema.Types.String}, 
        eng: { type: Schema.Types.String}
    } , { versionKey: false, _id: false });

运行时出现以下错误：

throw new TypeError('Invalid value for schema path `' + fullPath +
            ^
TypeError: Invalid value for schema path `title.type`, got value "undefined"
    at Schema.add (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/mongoose/lib/schema.js:473:13)
    at Schema.add (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/mongoose/lib/schema.js:507:12)
    at new Schema (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/mongoose/lib/schema.js:130:10)
    at Object.<anonymous> (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/src/models/article.model.ts:5:23)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Module.m._compile (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/ts-node/src/index.ts:858:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Object.require.extensions.(anonymous function) [as .ts] (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/ts-node/src/index.ts:861:12)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/src/services/article.service.ts:1:1)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Module.m._compile (/Users/daviniaroca/Documents/programacion/freelance/menutServer/menut_server/node_modules/ts-node/src/index.ts:858:23)

【问题讨论】：

标签： node.js mongodb mongoose-schema

【解决方案1】：

您的文章模型标题字段类型不能是您的自定义类型。如果您希望模型架构的字段是自定义架构，则必须

const sectionSchema = new Schema({
    title: LanguagesSchema,
});

您可以在此答案https://stackoverflow.com/a/39295760/6329540中找到更多信息

【讨论】：