如何在 mongoose 模式的项目数组中定义对象

Question

is the best practice when creating a object inside of an array to simply define an object inside of an array? How would mongodb know to expect an array, and would query on this array be efficent?

for example in this schema

const vancouverSchema = new mongoose.Schema(
    {
        jobs: {
            retail: {
                type:Array
            },
            general_labour: {
                type:Array
            },
            sales: {
                type:Array
            },
            government: {

            }

         },
    }
)

would it be best practice to do simply

retail: [{
    title: {
        type: String
    },
    description: {
        type:String
    },
    pay: {
        type:Number
    }
}]

VS

retail: {
    type:Array
},

the attempt being to create a simple schema for a city and its various categories without much cognitive overhead for this part of the design.

This is an example of Vancouver Schema, but I will have 15-20++ city schema, simply copy and paste to create collections dynamically, and because there is so much to keep track of, it seems like the simplest way to do it. I know, its bad to copy paste, but.. is it not permitted for high level design? rather than introduce bugs by trying some clever way, thanks everyone.

const vancouverSchema = new mongoose.Schema(
    {
        jobs: {
            retail: [
            {
                title: {
                    type: String
                },
                description: {
                    type: String
                },
                pay: {
                    type: Number
                },
                contact_email: {
                    type: String
                }
            },
                {
        timestamps: true
                }

            ],
            general_labour: {
                type:Array
            },
            sales: {
                type:Array
            },
            government: {

            }

         },
        for_sale: {
            free: {
                type:Array
            },
            antiques: {
                type:Array

            },
            appliances: {
                type:Array

            }
        },
        housing:{
        apt: {
                type:Array
        },
        office_commerical:{
                type:Array
        }
        }
    }
)

Answer 1

You can do in this way:

const vancouverSchema = new mongoose.Schema({
    jobs: {
        retail: [
            {
                type: mongoose.Schema.Types.ObjectId,
                ref: 'newSchemaCreated'
            }
        ],
        general_labour: {
            type: [Number]
        },
        sales: {
            type: [Boolean]
        },
        government: {}
    }
})

For retail would be better, if you create another schema. And if you have anything else like the retail property, you should do the same. Because put things too much nested is never good.