sql – 外键猫鼬

发布时间：2020-12-12 16:40:55 所属栏目：MsSql教程来源：网络整理

导读：我从麻雀开始,我想知道如何做这种类型的配置：食谱有不同的成分我有两个模型：成分和食谱： var mongoose = require('mongoose');var Schema = mongoose.Schema;var IngredientSchema = new Schema({ name: String});module.exports = mongoose.model('Ing

我从麻雀开始,我想知道如何做这种类型的配置：

食谱有不同的成分

我有两个模型：

成分和食谱：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var IngredientSchema = new Schema({
    name: String
});

module.exports = mongoose.model('Ingredient',IngredientSchema);


var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var RecipeSchema = new Schema({
    name: String
});

module.exports = mongoose.model('Recipe',RecipeSchema);

解决方法

检查下面的更新代码,特别是这部分：{type：Schema.Types.ObjectId,ref：’Ingredient’}

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var IngredientSchema = new Schema({
    name: String
});

module.exports = mongoose.model('Ingredient',IngredientSchema);


var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var RecipeSchema = new Schema({
    name: String,ingredients:[
      {type: Schema.Types.ObjectId,ref: 'Ingredient'}
    ]
});

module.exports = mongoose.model('Recipe',RecipeSchema);

保存：

var r = new Recipe();

r.name = 'Blah';
r.ingredients.push('mongo id of ingredient');

r.save();

（编辑：李大同）

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