what should I do if the project name contains hyphen in rust - rust

Question

I am a newbie of rust, when I tried to write a rust web api, but the project contains hyphen so I could not use it, if the project name like diesel_demo , I could use it like this:
use diesel_demo::schema::posts::dsl::*;
but if my project name like diesel-demo, what should I do to use it? I can not change my project name now with hyphen reddwarf-music. I read the docs and tell me the cargo will trans the - to _ by default, so I am use it like this:
use reddwarf_music::schema::posts::dsl::*;
but shows error like this:
~/Documents/GitHub/reddwarf-music on  develop! ⌚ 17:56:51
$ cargo build ‹ruby-2.7.2›
Compiling hello-rocket v0.1.0 (/Users/dolphin/Documents/GitHub/reddwarf-music)
error[E0433]: failed to resolve: use of undeclared crate or module `reddwarf_music`
--> src/biz/music/music.rs:1:5
|
1 | use reddwarf_music::schema::posts::dsl::*;
| ^^^^^^^^^^^^^^ use of undeclared crate or module `reddwarf_music`
what should I do handle the - in rust? By the way the scheme is generate in my local src, not from third package. This is my project structure:
this is my Cargo.toml:
[package]
name = "reddwarf_music"
version = "0.1.0"
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
rocket = { version = "0.5.0-rc.1", features = ["json"] }
rand = "0.8.4"
serde = { version = "1.0.64", features = ["derive"] }
serde_json = "1.0.64"
reqwest = "0.11.4"
# database
diesel = { version = "1.4.4", features = ["postgres"] }
dotenv = "0.15.0"

Answer 1

Within a crate you don't use the crates name with use, rather, you refer to the crate itself using the identifier crate.
So inside your crate "reddwarf-music", when you want to use an internal symbol, instead of writing
use reddwarf_music::schema::posts::dsl::*;
you write
use crate::schema::posts::dsl::*;