derive_meta/
lib.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
#![allow(warnings)]

extern crate proc_macro;

use meta::MetaFields;
use proc_macro::TokenStream;
use quote::quote;
use syn;

#[proc_macro_derive(MetaFields)]
pub fn derive_meta(input: TokenStream) -> TokenStream {
    let ast = syn::parse(input).unwrap();
    impl_meta(&ast)
}

fn impl_meta(ast: &syn::DeriveInput) -> TokenStream {
    let name = &ast.ident;
    let gen = quote! {
        impl MetaFields for #name {

            fn update_fields(&mut self, user_id: Uuid) {
                self.updu = Option::from(user_id);
                self.ver = Option::from(self.ver.unwrap() + 1);
                self.updt = Option::from(Utc::now().naive_local());
                // self.rstatus = Option::from(RStatus::Active);
            }

            fn init_fields(&mut self, user_id: Uuid) {
                self.uuid = Uuid::new_v4();
                self.updu = Option::from(user_id);
                self.ver = Option::from(0);
                self.updt = Option::from(Utc::now().naive_local());
                self.rstatus = Option::from(RStatus::Active);
            }

        }
    };
    gen.into()
}