错误:查询[对象]失败: wasm执行失败

Question

我很难解决这个错误。我现在试图得到一个产品数据列表，以矢量形式存储在地图中。

#[near_bindgen]
#[derive(Serialize, Deserialize, Debug, BorshDeserialize, BorshSerialize)]
#[serde(crate = "near_sdk::serde")]
pub struct Room {
    room_id: U64,
    name: String,
    image: String,
    description: String,
    location: String,
    price: U128,
    owner: AccountId,
}

#[near_bindgen]
#[derive(BorshDeserialize, BorshSerialize)]
pub struct Rooms {
    pub rooms: UnorderedMap<U64, Room>,
}

impl Default for Rooms {
    fn default() -> Self {
        Self {
            rooms: UnorderedMap::new(b"r".to_vec()),
        }
    }
}

#[near_bindgen]
impl Rooms {
    pub fn set_room(
        &mut self,
        name: String,
        image: String,
        description: String,
        location: String,
        price: U128,
    ) -> U64 {
        let timestamp = env::block_timestamp();
        let convert_timestamp: U64 = timestamp.into();
    
        let account_id = env::signer_account_id();

        self.rooms.insert(
            &convert_timestamp.clone(),
            &Room {
                room_id: convert_timestamp,
                name,
                image,
                description,
                location,
                price,
                owner: account_id,
            },
        );
        convert_timestamp
    }

    pub fn get_room(&self, room_id: U64) -> Room {
        self.rooms.get(&room_id).expect("No Room")
    }

    pub fn get_rooms(&self) -> Vec<Room> {
        Vec::from_iter(self.rooms.values())
    }
}

当我调用get_rooms时会发生错误。

$ near view dev-1658072311649-16892075058144 get_rooms

    View call: dev-1658072311649-16892075058144.get_rooms()
    An error occured
    Error: Querying [object Object] failed: wasm execution failed with error: FunctionCallError(HostError(GuestPanic { panic_msg: "Cannot deserialize element" })).
    {
      "block_hash": "54p5pS8xrzi7GWzv5YcgpNT33f7RqYdR7sUzHaTdzsqf",
      "block_height": 95181885,
      "error": "wasm execution failed with error: FunctionCallError(HostError(GuestPanic { panic_msg: \"Cannot deserialize element\" }))",
      "logs": []
    }
        at JsonRpcProvider.query (/Users/user/.config/yarn/global/node_modules/near-api-js/lib/providers/json-rpc-provider.js:123:19)
        at processTicksAndRejections (node:internal/process/task_queues:96:5)
        at async Account.viewFunction (/Users/user/.config/yarn/global/node_modules/near-api-js/lib/account.js:366:24)
        at async exports.callViewFunction (/Users/user/.config/yarn/global/node_modules/near-cli/index.js:98:48)
        at async Object.handler (/Users/user/.config/yarn/global/node_modules/near-cli/utils/exit-on-error.js:52:9)
    TypedError: Querying [object Object] failed: wasm execution failed with error: FunctionCallError(HostError(GuestPanic { panic_msg: "Cannot deserialize element" })).
    {
      "block_hash": "54p5pS8xrzi7GWzv5YcgpNT33f7RqYdR7sUzHaTdzsqf",
      "block_height": 95181885,
      "error": "wasm execution failed with error: FunctionCallError(HostError(GuestPanic { panic_msg: \"Cannot deserialize element\" }))",
      "logs": []
    }
        at JsonRpcProvider.query (/Users/user/.config/yarn/global/node_modules/near-api-js/lib/providers/json-rpc-provider.js:123:19)
        at processTicksAndRejections (node:internal/process/task_queues:96:5)
        at async Account.viewFunction (/Users/user/.config/yarn/global/node_modules/near-api-js/lib/account.js:366:24)
        at async exports.callViewFunction (/Users/user/.config/yarn/global/node_modules/near-cli/index.js:98:48)
        at async Object.handler (/Users/user/.config/yarn/global/node_modules/near-cli/utils/exit-on-error.js:52:9) {
      type: 'UntypedError',
      context: undefined
    }

为什么只有当我将产品信息作为向量得到时，才会得到关于序列化的错误？

所有其他功能都能正常工作。

如果你知道原因和解决办法，我想知道。

Answer 1

我刚刚测试了你的代码，它对我很好。您可以尝试在dev-1658147947569-44192518546131中调用该方法。

确保您使用的是最新的近sdk (4.0)，并且您正在从正确的位置导入所有内容：

use near_sdk::borsh::{self, BorshDeserialize, BorshSerialize};
use near_sdk::{near_bindgen, env, AccountId, collections::{UnorderedMap}};
use near_sdk::json_types::{U64, U128};
use near_sdk::serde::{Serialize, Deserialize};