Json 为Node/MongoDB应用程序设定种子的最佳方法是什么？

所以，我对MEAN stack是新手，我在尝试播种MongoDB时遇到了困难。我正在使用Mongoose与数据库进行通信，有大量文档建议我应该能够使用填充的JSON文件进行种子设定

我所尝试的：

；非常直截了当，但始终在数组末尾抛出错误。（可能丢失的bson模块有故障？）

；也很简单，基本上是在导出到数据库之前将JSON对象放入变量中。有希望，但是。。。更多错误

Successfully initialized mongoose-seed
[ 'app/models/locationsModel.js' ]
Locations collection cleared
Error creating document [0] of Location model
Error: Location validation failed
Error creating document [1] of Location model
Error: Location validation failed
Error creating document [2] of Location model
Error: Location validation failed...

因此，我的想法是，这可能是JSON结构中的一个语法错误，但处理这个错误并没有产生任何真正的解决方案（或者我可能错过了它？）。我的JSON示例：

{
    {
        "header": "Dan's Place",
        "rating": 3,
        "address": "125 High Street, New York, 10001",
        "cord1": -73.0812,
        "cord2": 40.8732,
        "attributes": ["Hot drinks", "Food", "Premium wifi"],
        "hours": [
            {
                "days": "Monday - Friday",
                "hours": "7:00am - 7:00pm",
                "closed": false
            },
            {
                "days": "Saturday",
                "hours": "8:00am - 5:00pm",
                "closed": false
            },
            {
                "days": "Sunday",
                "closed": true
            }
        ],
        "reviews": [
            {
                "rating": 4,
                "id": ObjectId(),
                "author": "Philly B.",
                "timestamp": "new Date('Feb 3, 2016')",
                "body": "It was fine, but coffee was a bit dull. Nice atmosphere."
            },
            {
                "rating": 3,
                "id": ObjectId(),
                "author": "Tom B.",
                "timestamp": "new Date('Feb 23, 2016')",
                "body": "I asked for her number. She said no."
            }
        ]
    },
    {
        "header": "Jared's Jive",
        "rating": 5,
        "address": "747 Fly Court, New York, 10001",
        "cord1": -73.0812,
        "cord2": 40.8732,
        "attributes": ["Live Music", "Rooftop Bar", "2 Floors"],
        "hours": [
            {
                "days": "Monday - Friday",
                "hours": "7:00am - 7:00pm",
                "closed": false
            },
            {
                "days": "Saturday",
                "hours": "8:00am - 5:00pm",
                "closed": false
            },
            {
                "days": "Sunday",
                "closed": true
            }
        ],
        "reviews": [
            {
                "rating": 5,
                "id": ObjectId(),
                "author": "Jacob G.",
                "timestamp": "new Date('Feb 3, 2016')",
                "body": "Whoa! The music here is wicked good. Definitely going again."
            },
            {
                "rating": 4,
                "id": ObjectId(),
                "author": "Tom B.",
                "timestamp": "new Date('Feb 23, 2016')",
                "body": "I asked to play her a tune. She said no."
            }
        ]
    }
}

此外，我不完全确定如何在JSON中指定子文档（假设我可以首先让种子过程正常工作）

这是我的模型：

var mongoose = require('mongoose');

var subHoursSchema = new mongoose.Schema({
    days: {type: String, required: true},
    opening: String,
    closing: String,
    closed: {type: Boolean, required: true}
});

var subReviewsSchema = new mongoose.Schema({
    rating: {type: Number, required: true, min: 0, max: 5},
    author: String,
    timestamp: {type: Date, "default": Date.now},
    body: String
}); 

var locationSchema = new mongoose.Schema({
    name: {type: String, required: true},
    address: String,
    rating: {type: Number, "default": 0, min: 0, max: 5}, 
    attributes: [String],
    coordinates: {type: [Number], index: '2dsphere'},
    openHours: [subHoursSchema],
    reviews: [subReviewsSchema]
});

mongoose.model('Location', locationSchema);

---

任何关于如何处理这些问题的见解都将不胜感激。谢谢

您可以使用

它将把一个JSON文件加载到指定的MongoDB实例和集合中，您所需要的只是在执行之前运行一个

mongod

实例

---

下面是一个使用

mongoimport

的示例，您的JSON没有在您的模式中流动

将JSON修复为：

{
    {
        "name": "Dan's Place",
        "rating": 3,
        "address": "125 High Street, New York, 10001",
        "coordinates": [-73.0812, 40.8732],
        "attributes": ["Hot drinks", "Food", "Premium wifi"],
        "openHours": [
            {
                "days": "Monday - Friday",
                "opening": "7:00am",
                "closing": "7:00pm",
                "closed": false
            },
            {
                "days": "Saturday",
                "opening": "8:00am",
                "closing": "5:00pm",
                "closed": false
            },
            {
                "days": "Sunday",
                "closed": true
            }
        ],
        "reviews": [
            {
                "rating": 4,
                "author": "Philly B.",
                "timestamp": "new Date('Feb 3, 2016')",
                "body": "It was fine, but coffee was a bit dull. Nice atmosphere."
            },
            {
                "rating": 3,
                "author": "Tom B.",
                "timestamp": "new Date('Feb 23, 2016')",
                "body": "I asked for her number. She said no."
            }
        ]
    },
    {
        "name": "Jared's Jive",
        "rating": 5,
        "address": "747 Fly Court, New York, 10001",
        "coordinates": [-73.0812, 40.8732],
        "attributes": ["Live Music", "Rooftop Bar", "2 Floors"],
        "openHours": [
            {
                "days": "Monday - Friday",
                "opening": "7:00am",
                "closing": "7:00pm",
                "closed": false
            },
            {
                "days": "Saturday",
                "opening": "8:00am",
                "closing": "5:00pm",
                "closed": false
            },
            {
                "days": "Sunday",
                "closed": true
            }
        ],
        "reviews": [
            {
                "rating": 5,
                "author": "Jacob G.",
                "timestamp": "new Date('Feb 3, 2016')",
                "body": "Whoa! The music here is wicked good. Definitely going again."
            },
            {
                "rating": 4,
                "author": "Tom B.",
                "timestamp": "new Date('Feb 23, 2016')",
                "body": "I asked to play her a tune. She said no."
            }
        ]
    }
}

您可以使用mongoose数据种子编写自己的种子脚本，用于与mongoose模型交互：

---

我在一个项目中解决了这个问题，方法是使用

mongoexport--jsonArray

将相关数据转储到扩展的JSON数组格式文件中，然后使用

EJSON

包将其导入节点应用程序中的POJO格式。然后，我使用Mongoose，使用您使用Mongoose创建的正确集合模型，将生成的JS数组插入到数据库中

第一次运行应用程序所需的JSON数据文件将签入应用程序存储库。 以下是一个快速示例，您可以根据自己的目的进行调整：

// ...
// 'Items' is the Mongoose collection model.
const itemResult = await Items.find({}).exec();
if(itemResult.length === 0) {
  const itemsSeedDataRaw = fs.readFileSync(`${__dirname}/data/items.json`, 'utf8');
  const itemsSeedData = EJSON.parse(itemsSeedDataRaw);
  await Items.insertMany(itemsSeedData);
}
// ...

---

我还建议您调查一下。有JS库版本和CLI版本。创建这个库的动机如下所述。

这无疑帮助我实现了我所期望的目标，至少在一定程度上是这样。我还不确定如何修改流程以包含子文档（很可能是

mongodump

），但这是朝着正确方向迈出的一大步。非常感谢。你说包含子文档是什么意思？您可以考虑使用“代码> ManguPux<／代码>的子文档，也可以考虑将数据导入数据库的灵活解决方案。这是我最近正在进行的一个开源项目，它使您能够使用JS库、CLI和Docker映像为MongoDB数据库添加种子。它支持JSON、JavaScript和TypeScript（Docker/custom TS apps）来定义数据。

// ...
// 'Items' is the Mongoose collection model.
const itemResult = await Items.find({}).exec();
if(itemResult.length === 0) {
  const itemsSeedDataRaw = fs.readFileSync(`${__dirname}/data/items.json`, 'utf8');
  const itemsSeedData = EJSON.parse(itemsSeedDataRaw);
  await Items.insertMany(itemsSeedData);
}
// ...