Question

我的代码包含2个模型，内容和电影。电影提到了内容。在电影＆＃39;查询当我尝试填充内容＆＃39;时，返回null。

内容模型

'use strict';

var mongoose = require('mongoose'),
    validators = require('./validators'),
    Schema = mongoose.Schema;

var contentType = ['M'];

var ContentSchema = new Schema({
    createdOn: {
        type: Date,
        default: Date.now
    },
    name: {
        type: String,
        required: true,
        unique: true,
        trim: true
    },
    type: {
        type: String,
        required: true,
        enum: contentType,
        trim: true
    },
    releaseDate: {
        type: Date
    },
    genres: [{
        type: Schema.Types.ObjectId,
        ref: 'Genre'
    }],
    language: {
        type: Schema.Types.ObjectId,
        ref: 'Language'
    },
    imagePath: {
        type: String
    },
    filePath: {
        type: String
    }
});

mongoose.model('Content', ContentSchema);

电影模型

var mongoose = require('mongoose'),
    validators = require('./validators'),
    Schema = mongoose.Schema;

var MovieSchema = new Schema({
    createdOn: {
        type: Date,
        default: Date.now
    },
    contentId: {
        type: Schema.Types.ObjectId,
        ref: 'Content'
    },
    cast: {
        type: [String]
    },
    synopsis: {
        type: String
    },
    length: {
        type: Number
    },
    director: {
        type: String
    }
});

mongoose.model('Movie', MovieSchema);

这是我服务器端的控制器：

Movie.find().populate('contentId').exec(function (err, movies) {
    if (err) {
        return res.json(500, {
            error: 'cannot list movies'
        });
    }
    res.json(movies);
});

输出：

[
    {
        "_id": "540dcdda98fcaefbaf26fd72",
        "contentId": null,
        "synopsis": "Nice Movie",
        "length": 140,
        "director": "Foo Bar",
        "cast": [],
        "createdOn": "2014-09-08T16:38:19.275Z"
    }
]

为什么输出为null，即使我在输出中看到contentId，如果我从查询中删除填充。

Answer 1

没关系，弄明白了这个问题。

代码没问题。我在＆＃39;内容＆＃39;中输入了数据。表而不是＆＃39;内容＆＃39;表。叹息。

Mongoose填充返回null

1 个答案: