问题描述：

在Rust中使用serde做json序列化，需要对一个字段指定序列化方法，添加serde注解后报错:

error: cannot find attribute `serde` in this scope
  --> src\models\order_model.rs:38:7
   |
38 |     #[serde(deserialize_with = "crate::utils::date_utils::deserialize_datetime_str")]
   |       ^^^^^
   |
   = note: `serde` is in scope, but it is a crate, not an attribute
 

报错代码：

pub struct QueryParam {pub id: Option<i32>,pub account_id: Option<i32>,pub job_id: Option<i32>,#[serde(deserialize_with = "crate::utils::date_utils::deserialize_datetime_str")]pub begin: Option<DateTimeWithTimeZone>,#[serde(deserialize_with = "crate::utils::date_utils::deserialize_datetime_str")]pub end: Option<DateTimeWithTimeZone>,
}

解决方法：

为当前stract添加#[derive(Deserialize, Serialize)]注解解决

修改后代码：

use serde::{Serialize, Deserialize};#[derive(Deserialize, Serialize, Clone, Debug)]
pub struct QueryParam {pub id: Option<i32>,pub account_id: Option<i32>,pub job_id: Option<i32>,#[serde(deserialize_with = "crate::utils::date_utils::deserialize_datetime_str")]pub begin: Option<DateTimeWithTimeZone>,#[serde(deserialize_with = "crate::utils::date_utils::deserialize_datetime_str")]pub end: Option<DateTimeWithTimeZone>,
}

原因分析：

根据报错信息很容易以为是导入缺失，其实是忘了添加derive注解，serde属性注解被直接丢给了编译器处理而没经过derive宏处理