I'm teachning myself Rust by building a CosmWasm contract.

我正在通过建立一份CosmWasm合同来教自己Rust。

Game is defined by

游戏的定义是

use cosmwasm_std::{Addr, Int256};
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Clone, Debug, JsonSchema)]
pub struct Game {
    id: u64,
    owner: Addr,
    round: Int256, // as close to infinite number of rounds as I can think of
    status: GameStatus,
    slots: [Slot; 9],
}

(Slot is another struct, and GameStatus is an enum, all prefixed with their own #[derive... macros.)

(Slot是另一个结构，而GameStatus是一个枚举，前缀都是它们自己的#[派生...宏。)

I have defined a Map of Games as follows

我定义了一个游戏地图，如下所示

use cw_storage_plus::{Item, Map};

pub const GAMES: Item<Map<u64, Game>> = Item::new("games");

In my contract's instantiate function I have the following

在我的合同的实例化函数中，我有以下内容

// game is an instance of a Game
GAMES.save(deps.storage, 0, &game)?;

GAMES.save shows error

GAMES.save显示错误

the method `save` exists for struct `Item<'static, Map<'static, u64, Game>>`, but its trait bounds were not satisfied
the following trait bounds were not satisfied:
`cw_storage_plus::Map<'_, u64, Game>: Serialize`
`cw_storage_plus::Map<'_, u64, Game>: DeserializeOwned`
`cw_storage_plus::Map<'_, u64, Game>: Deserialize<'de>`
which is required by `cw_storage_plus::Map<'_, u64, Game>: DeserializeOwned`

From what I can tell the issue is not with the Item or the Map but the Game struct.

据我所知，问题不在于物品或地图，而在于游戏结构。

I've tried importing DeserializeOwned as in

我已尝试导入反序列化Owned，如

use serde::de::{DeserializeOwned}

but there is no derive mechanism for it so I can't just add it to the derive.

但它没有派生机制，所以我不能只把它加到派生中。

I read at stackoverflow.com/a/60091762 that

我在Stackoverflow.com/a/60091762上看到

You just have to add #[derive(serde::Deserialize)] and use the DeserializeOwned.

I feel like I am missing something obvious but I've not been able to work it out.

我觉得我遗漏了一些明显的东西，但我一直无法解决这个问题。