Rust 在 JSON 序列化时复用结构体字段

依赖

[dependencies]
serde = { version = "1", features = ["derive"] }
serde_json = { version = "1" }

示例

参考 https://serde.rs/attr-flatten.html

#[derive(serde::Serialize, serde::Deserialize, Debug, Copy, Clone)]
#[serde(rename_all(serialize = "camelCase", deserialize = "camelCase"))]
pub struct PageRequest {pub page: i32,pub size: i32,
}#[derive(serde::Serialize, serde::Deserialize, Debug)]
#[serde(rename_all(serialize = "camelCase", deserialize = "camelCase"))]
pub struct PageResponse<T> {#[serde(flatten)]page_request: PageRequest,total: i64,content: Vec<T>,
}impl Default for PageRequest {fn default() -> Self {Self { page: 1, size: 10 }}
}fn main() {// language=jsonlet json = r#"{ "page": 1, "size": 5, "total": 100, "content": [1, 2, 3, 4, 5] }"#;let page_response = serde_json::from_str::<PageResponse<i32>>(json).unwrap();println!("{page_response:?}");let json = serde_json::to_string_pretty(&page_response).unwrap();println!("{json}")
}