如何在猫鼬中声明集合名称和模型名称 [英] How to declare collection name and model name in mongoose

问题描述

我有3种记录，

1)Categories,
2)Topics  and
3)Articles 

在我的mongodb中，我只有1个名为类别"的集合，在其中处理了以上3种类型的文档.

In my mongodb, i have only 1 colection named 'categories' in which i stroe the above 3 types of documents.

对于这3个模块，我以如下方式编写了3个模型(每个模型一个)，

For these 3 modules,i wrote 3 models(one each) in such a way like below,

mongoose.model('categories', CategorySchema);
mongoose.model('categories', TopicSchema)
mongoose.model('categories', ArticlesSchema)

like .... mongoose.model('collection_name'，Schema_name)

like....mongoose.model('collection_name', Schema_name)

但是当我运行我的代码时，它会抛出错误

but when i run my code ,it throws error that

Cannot overwrite `categories` model once compiled.

如果我这样更改上述型号，

If i change the above models like this,

mongoose.model('category','categories', CategorySchema);
mongoose.model('topics','categories', TopicSchema)
mongoose.model('articles','categories', ArticlesSchema)

它正在创建2个我不想要的名为主题和文章的集合. 这是我现在的问题，任何人都可以建议我帮忙.....谢谢....

It is creating 2 collections named topics and articles which i dont want. This is my issue right now,can anyone suggest me help.....Thanks....

推荐答案

Try-

mongoose.model('category', CategorySchema, 'categories');
mongoose.model('topics', TopicSchema, 'categories');
mongoose.model('articles', ArticlesSchema, 'categories');

如文档中所述: http://mongoosejs.com/docs/api.html #index_Mongoose-model

猫鼬#model(名称，[模式]，[集合]，[skipInit])

Mongoose#model(name, [schema], [collection], [skipInit])

定义或检索模型.

参数:

• 第一个参数-名称< String>型号名称
• 第二个参数-[模式]<模式>模式名称
• 第3个参数-[集合]< String>集合名称(可选，由模型名称得出)
• 第4个参数-[skipInit]< Boolean>是否跳过初始化(默认为false)

• 1st param - name <String> model name
• 2nd param - [schema] <Schema> schema name
• 3rd param - [collection] <String> collection name (optional, induced from model name)
• 4th param - [skipInit] <Boolean> whether to skip initialization (defaults to false)

请参阅- https://stackoverflow.com/a/14454102/3896066

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