Question

我正在尝试将一堆数据从文件加载到我的mongoDB中; 使用node：v8.9.1，mongoose：^ 4.10.8，MongoDB v3.4.1 - 在Win 10上运行。

仅插入文档中的几个元素。我怀疑架构中有什么东西，但我不能确定，console.log正确地反映了100％的日期。

这是我的数据： / _ mock_data / test.json

[{
    "AUTHOR":"Anthony Johnson",
    "TITLE":"A Little March",
    "COLLECTION_TITLE":"Classic Fairytails for Children",
    "FORMAT":"Trade Paperback",
    "PUBLISHER":"Randon House",
    "SKU":"10055",
    "SUGGESTED_GRADE_LEVEL":[6],
    "STATE_RATING":[{"NY":[1]}, {"PA":[1]}, {"VA":[3]}],
    "AUDIO_LINK":""
},...]

以下是代码： app.js （缩减为相关内容）

var express = require( 'express' );
var app = express();
var bodyParser = require( 'body-parser' );
var mongoose = require( 'mongoose' );
    mongoose.Promise = require( 'bluebird' );

app.use( bodyParser.json() );

var Catalog = require( './models/catalog' );

mongoose.connect('mongodb://localhost:27017/test', {server: { poolSize: 5 }});
var db = mongoose.connection;

app.get( '/api/loadCatalog', function( req, res ) {
    var catalog = require( './_mock_data/test.json' );

    for ( var i in catalog ) {

        Catalog.create( catalog[i] );
        console.log( catalog[i] );

    };

});

app.listen( 3000, function() {
    console.log( 'server started on port 3000' );
});

/模型/目录

var mongoose = require( 'mongoose' );

// catalog schema
var catalogSchema = mongoose.Schema({
    author : {
        type: String
        ,required: false
    }
    ,title : {
        type: String
        ,required: false
    }
    ,collection_title : {
        type: String
        ,required: false
    }
    ,format : {
        type: String
        ,required: false
    }
    ,publisher : {
        type: String
        ,required: false
    }
    ,sku : {
        type: String
        ,required: false
    }
    ,suggested_grade_level : {
        type: Array
        ,required: false
    }
    ,state_rating : {
        type: [mongoose.Schema.Types.Mixed]
        ,required: false
    }
    ,audio_link : {
        type: String
        ,required: false
    }
});

var Catalog = module.exports = mongoose.model( 'Catalog', catalogSchema );

// Get Items
module.exports.getItems = function( callback, limit ) {
    Catalog.find( callback ).limit( limit );
};

// Add Item
module.exports.addItem = function( item, callback ) {
    Catalog.create( item, callback );
};

以及我得到的错误 -

Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in Anthony Johnson
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in A Little March
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in Classic Fairytails for Children
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in Trade Paperback
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in Randon House
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in 10055
Unhandled rejection TypeError: Cannot use 'in' operator to search for '_id' in 6

所以我得到的数据看起来像这样

{
    "_id" : ObjectId("5a28fa8503511d1d14054c92"),
    "state_rating" : [ ],
    "suggested_grade_level" : [ ],
    "__v" : 0
}

错误的所有字符串数据和对象数据进入，“实际”数据是一个1000的数组，这是一次性导入，是的我可以使用mongo cli进行导入，但我只是在开发在本地，最终我会将这些数据推送到Atlas帐户，据我所知，这将是获取数据的方法。

循环内的console.log为我提供了实际的数据

Anthony Johnson
A Little March
Classic Fairytails for Children
Trade Paperback
Randon House
10055
[ 6 ]
[ { NY: [ 1 ] }, { PA: [ 1 ] }, { VA: [ 3 ] } ]

我很确定我错过了使用模型以这种方式使用模式的基本内容......我的“获取”和“添加”工作正常...也许我应该在模型中进行循环，而不是应用...

Answer 1

你需要做一个小循环改变，

   col1 col2
1:    8  cat
2:   11  cat
3:   12  cat
4:   14  cat
5:   19  cat
6:   20  cat

要将键转换为lower和camel大小写以匹配架构，您可以创建一个像这样的小辅助函数

   for ( var i in catalog ) {
    var key = convertStringToCamelCase(i);
    Catalog.create( {key : catalog[i]} );
    console.log( {key : catalog[i]} );

    };

}

mongoose驱动程序在循环中不插入数据

1 个答案: