Crates.io | struct-patch |
lib.rs | struct-patch |
version | 0.4.1 |
source | src |
created_at | 2023-01-17 14:03:52.565412 |
updated_at | 2023-10-02 15:41:45.622943 |
description | A library that helps you implement partial updates for your structs. |
homepage | |
repository | https://github.com/yanganto/struct-patch/ |
max_upload_size | |
id | 761010 |
size | 17,118 |
A lib help you patch Rust instance, and easy to partial update configures.
This crate provides the Patch
trait and an accompanying derive macro.
Deriving Patch
on a struct will generate a struct similar to the original one, but with all fields wrapped in an Option
.
An instance of such a patch struct can be applied onto the original struct, replacing values only if they are set to Some
, leaving them unchanged otherwise.
use struct_patch::Patch;
use serde::{Deserialize, Serialize};
#[derive(Default, Debug, PartialEq, Patch)]
#[patch_derive(Debug, Default, Deserialize, Serialize)]
struct Item {
field_bool: bool,
field_int: usize,
field_string: String,
}
fn patch_json() {
let mut item = Item {
field_bool: true,
field_int: 42,
field_string: String::from("hello"),
};
let data = r#"{
"field_int": 7
}"#;
let patch: ItemPatch = serde_json::from_str(data).unwrap();
item.apply(patch);
assert_eq!(
item,
Item {
field_bool: true,
field_int: 7,
field_string: String::from("hello")
}
);
}