如何从模型的数组属性中的对象属性中查找文档

Question

I have two models:

User:

{ 
    name: { type: String, required: true},
    company: { type: Schema.Types.ObjectId, ref: "Company" },
}

Company:

( 
    name: { type: String, required: true},
    users : [{
        user: {type: Schema.Types.ObjectId, ref: "User"},
        permistion: {type: Number, default: 0}
    }]
)

1. I want to find the user with permistion = 1 in Company.

2. I want to find the user and result user: {name, company, permistionCompany}

I have alrealy fix this problem. The contruction of my model is so bad and I fix my model:

User:

{ 
    name: { type: String, required: true},
    company: {
        id: { type: Schema.Types.ObjectId, ref: "Company" },
        userPermission: { type: Number, default: 0}
    },

Company:

( 
    name: { type: String, required: true},
    users : [{user: {type: Schema.Types.ObjectId, ref: "User"}],
)

And when I want to find user in this company and permistion = 1, I just use:

User.find({_id: userId, company.id: companyId, company.userPermistion: 1})

Answer 1

1) Two ways you can query inside an array. You can use $elemMatch ( https://docs.mongodb.com/manual/reference/operator/query/elemMatch/ ) or, given the structure of the schema, you can just do:

Company.find({"users.permistion": 1}, (error, docs) => {
  console.log(docs)  
})

2) Not quite understanding the question, but going to assume you want to get the information from your 'Users' collection given the query above. If that's the case, you can do a .populate. A good guide would be here: https://medium.com/@nicknauert/mongooses-model-populate-b844ae6d1ee7

Company.find({"users.permistion": 1}).populate("users.user", (error, docs) => {
    console.log(docs)  
})