将对象中的数据数组发送到 API 会导致对象中的数组为空 [英] sending array of data in object to API results in empty array in object

问题描述

我有一个 API 来制作鸡尾酒.每种鸡尾酒都有一份成分清单.在鸡尾酒模式中，我想将其添加如下(成分)

鸡尾酒模式

const schema = new Schema({名称:{ 类型:字符串，必填:真}，配方:{类型:字符串，需要:真}，配料: [{成分:{type:mongoose.Schema.Types.ObjectId，参考:'成分'}数量:{type: Number, required: false},数量类型:{类型:字符串，必填:假}}],创建者:{类型:mongoose.Schema.Types.ObjectId，参考:'用户'},createdDate: { type: Date, default: Date.now }});

我按如下方式填充鸡尾酒

return await Cocktail.find().populate('成分','名称酒精').populate('创建者', '用户名').select('命名配方成分创建者');

创建鸡尾酒时，我将其作为请求的正文.我使用 Postman 来做这件事.

<代码>{"name": "冰镇伏特加","recipe": "伏特加加冰，有什么不对的?",配料": [{"成分": "5eb8611ebf0d4b0017bf0d47","数量": "4",数量类型":个"},{"成分": "5eb86186bf0d4b0017bf0d48","数量": "4",数量类型":cl"}],创作者":5eb85eb0bf0d4b0017bf0d46"}

其中两个成分和创建者标签分别是成分和用户的有效 ID.发送请求会给出 200 OK 状态，但是当从我的数据库中取出所有鸡尾酒时，这就是结果.成分字段的空数组

<预><代码>[{"_id": "5eb863b4bf0d4b0017bf0d4b","name": "冰镇伏特加","recipe": "伏特加加冰，有什么不对的?",配料": []，创造者":{"_id": "5eb85eb0bf0d4b0017bf0d46","用户名": "调酒师","id": "5eb85eb0bf0d4b0017bf0d46"},"id": "5eb863b4bf0d4b0017bf0d4b"}]

我不知道我哪里出错了.

解决方案

return await Cocktail.find().populate('ingredients.ingredient', '酒名').populate('创建者', '用户名').select('命名配方成分创建者');

试试这个

I have an API to create cocktails. Each cocktail has a list of Ingredients. In the cocktailschema I want to add this as following (ingredients)

cocktailschema

const schema = new Schema({
    name: { type: String, required: true },
    recipe: {type: String, required: true },
    ingredients: [{
        ingredient: {type: mongoose.Schema.Types.ObjectId, ref: 'Ingredient'}
        quantity: {type: Number, required: false},
        quantityType: {type: String, required: false}
    }],
    creator: {
        type: mongoose.Schema.Types.ObjectId,
        ref:'User'
    },
    createdDate: { type: Date, default: Date.now }
});

I populate the cocktails as follows

return await Cocktail.find()
    .populate('ingredients', 'name alcoholic')
    .populate('creator', 'username')
    .select('name recipe ingredients creator');

When creating a Cocktail I give this as the body of my request. I use Postman to do this.

{
    "name": "Cooled Vodka",
    "recipe": "Vodka and Ice, what's there to do wrong?",
    "ingredients": [
        {
            "ingredient": "5eb8611ebf0d4b0017bf0d47",
            "quantity": "4",
            "quantityType": "pcs"
        },
        {
            "ingredient": "5eb86186bf0d4b0017bf0d48",
            "quantity": "4",
            "quantityType": "cl"
        }
    ],
    "creator": "5eb85eb0bf0d4b0017bf0d46"
}

where the two ingredient and the creator tags are valid IDs for respectively ingredients and a user. Sending the request gives a 200 OK status however when getting all the cocktails out of my db, this is the result. An empty array for the ingredients field

[
    {
        "_id": "5eb863b4bf0d4b0017bf0d4b",
        "name": "Cooled Vodka",
        "recipe": "Vodka and Ice, what's there to do wrong?",
        "ingredients": [],
        "creator": {
            "_id": "5eb85eb0bf0d4b0017bf0d46",
            "username": "Bartender",
            "id": "5eb85eb0bf0d4b0017bf0d46"
        },
        "id": "5eb863b4bf0d4b0017bf0d4b"
    }
]

I have no idea where I go wrong.

解决方案

return await Cocktail.find()
    .populate('ingredients.ingredient', 'name alcoholic')
    .populate('creator', 'username')
    .select('name recipe ingredients creator');

try this one

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