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Exdet
Asked:2024-01-23 02:26:50 +0800 CST2024-01-23 02:26:50 +0800 CST

如何连接到 mongoDB？（锈）

  • 772

我自己铆接了这样一个结构，然后根据我的想法，我可以开发它

| src /
|       - api /
|       |       -patterns /
|       |       |       - mod.rs
|       |       |       - patterns.rs
|       |       |_________
|       |        - mod.rs
|       |______________
|    
|       - models /
|       |        - mod.rs
|       |        - pattern_model.rs
|       |        - pattern_asset_model.rs
|       |        - pattern_folder_model.rs
|       |        - device_model.rs
|       |        - device_asset_model.rs
|       |        - device_folder_model.rs
|       |        - universal_pattern_model.rs
|       |_________________
|
|       - repository /
|       |       | - mod.rs
|       |       | - mongodb_repo.rs
|       |_________________
|
|       - img /
|       |       
|       |       
|       |_________________
|
|       - .env      

|       - main.rs

|_________________________
- Cargo.lock
- Cargo.toml


api - 旨在调整 API 处理程序。模型 - 旨在调制数据逻辑。存储库 - 旨在调整数据库逻辑。但这不是问题的重点（尽管如果有人有任何意见，请不要害羞）。

我正在尝试通过 Rocket 从数据库启动一台服务器，然后简单地将一条记录添加到集合中。

// main.rs 
mod api;
mod models;
mod repository;

#[macro_use]
extern crate rocket;

use api::patterns::patterns::{create_pattern};
use repository::mongodb_repo::MongoRepo;


#[launch]
fn rocket() -> _ {
    let db = MongoRepo::init();
    rocket::build().manage(db)
        .mount("/api/usepi/patterns", routes![create_pattern])
}

这是数据库初始化代码..

//mongodb_repo.rs
use std::env;


extern crate dotenv;
use dotenv::dotenv;

use mongodb::{Client, Collection, options::ClientOptions};
use mongodb::error::Error;
use mongodb::results::InsertOneResult;

use crate::models::pattern_model::Pattern as ModelPattern;

pub struct MongoRepo {
    pattern_collection: Collection<ModelPattern>,
}

impl MongoRepo {

    pub async fn init() -> Self {
            dotenv().ok();
            let mongodb_uri = dotenv::var("MONGODB_URI");
            println!("AAAAAA {:?}",mongodb_uri);
            let client_options = ClientOptions::parse(mongodb_uri).await?;
            let client = Client::with_options(client_options)?;
            let db = client.database("RustBlueTractorDB");
            let pattern_collection: Collection<ModelPattern> = db.collection("Pattern");
            MongoRepo { pattern_collection }
        }

    .....

}

但这样的错误总是会发生：

error[E0277]: the trait bound `Result<std::string::String, dotenv::Error>: AsRef<str>` is not satisfied
    --> src/repository/mongodb_repo.rs:26:55
     |
26   |             let client_options = ClientOptions::parse(mongodb_uri).await?;
     |                                  -------------------- ^^^^^^^^^^^ the trait `AsRef<str>` is not implemented for `Result<std::string::String, dotenv::Error>`
     |                                  |
     |                                  required by a bound introduced by this call
     |
note: required by a bound in `ClientOptions::parse`

当你修复一件事时，会出现一个错误，并显示“rocket::build().manage(db)..”，然后又回到这一点。我尝试按照手册进行操作（虽然数量不是很多，但由于各种原因它们都不起作用）。在 .env 中我有..

MONGODB_URI=mongodb://192.168.1.63:27018/

这是pattern_model 中的内容...

use mongodb::bson::oid::ObjectId;
use serde::{Serialize, Deserialize};

#[derive(Debug, Deserialize, Serialize)]
pub struct PatternRequest {
    pub data: Pattern,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Pattern {
    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
    pub id: Option<ObjectId>,
    pub title: String,
    pub description: String,
    pub icon: String,
    pub pattern: String,
    pub create_date: String,
    pub update_date: String,
    pub version: String,
    pub favourite: bool,
}

还有 toml：

[package]
name = "rust"
version = "0.1.0"
edition = "2021"

[dependencies]
rocket = {version = "0.5.0-rc.2", features = ["json"]}
serde = "1.0.136"
dotenv = "0.15.0"
chrono = "0.4.31"

[dependencies.mongodb]
version = "2.8.0"
default-features = false
features = ["async-std-runtime"]

问题是，我该如何做到这一点？我出于紧急需要而从nestJS切换过来，如果通常的功能看起来可以工作，那么这是一个大问题，我不明白。提前致谢！

mongodb

1 个回答

  1. Best Answer

    一般来说，像这样：

    #[launch]
async fn rocket() -> _ {
    let db = MongoRepo::init().await;
    rocket::build().manage(db)
        .mount("/api/patterns/patterns", routes![create_pattern])
}

    和

       impl MongoRepo {

    pub async fn init() -> Self {
        dotenv().ok();
        // for (key, value) in env::vars() {
        //     println!("{}: {}", key, value);
        // }
        let uri = match env::var("MONGODB_URI") {
            Ok(v) => v.to_string(),
            Err(_) => format!("Error loading env variable"),
        };
        // println!("{}",uri);
        let client = Client::with_uri_str(uri).await.unwrap();
        let db = client.database("ModelPattern");
        let pattern_collection: Collection<ModelPattern> = db.collection("ModelPattern");
        MongoRepo { pattern_collection }
    }
}
    • 0

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