Avoid duplication when serializing/deserializing mongodb documents-CodePudding

I have 2 collections:

profiles
dances

struct Profile {
   id: String,
   firstname: String,
   dances: Vec<String>
}

struct DanceModel {
   id: String,
   name: String,
}

I have a find query which does a lookup on the dances collection.

let cursor = profile_collection.aggregate(pipeline, None).await.unwrap();
let results = cursor.try_collect().await.unwrap_or_else(|_| vec![]);
let profile = results.first().unwrap();        
let result = bson::from_document::<ProfileResult>(profile.clone());

I created a new model like so:

struct ProfileResult {
   id: String,
   name: String,
   dances: Vec<DanceModel>
}

As you can see, the id and name fields are being duplicated, and I have 2 models for the same data.

Is there any way to avoid duplication of attributes and data models?

CodePudding user response：

It looks like you are trying to apply an object concept to a procedural technology.

To work around this issue, you can create an IdName struct and apply that struct to the model in a uid field.

struct IdName {
   id: String,
   name: String,
}

struct Profile {
   id: String,
   firstname: String,
   dances: Vec<String>
}

struct DanceModel {
   uid: IdName
}

struct ProfileResult {
    uid: IdName
    dances: Vec<DanceModel>
}