39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
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use proc_macro2::Ident;
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use quote::quote;
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use syn::Expr;
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use crate::{common, StructAttributes};
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pub(crate) fn derive_diesel_crud_read_impl(
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StructAttributes {
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table, entity, pk, ..
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}: &StructAttributes,
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identifier: &Ident,
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) -> proc_macro2::TokenStream {
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let body = function_body(table);
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let return_type = common::return_type(quote! { Self::Entity });
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quote! {
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#[automatically_derived]
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impl lib::diesel_crud_trait::DieselCrudRead for #identifier {
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type PK = #pk;
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type Entity = #entity;
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fn read<'a, 'b>(&'a self, pk: Self::PK) -> #return_type
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where
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Self: Sync + 'a,
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'a: 'b
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{
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Box::pin(async move {
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#body
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})
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}
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}
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}
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}
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fn function_body(table: &Expr) -> proc_macro2::TokenStream {
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common::function_body(quote! {
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diesel_async::RunQueryDsl::get_result(diesel::QueryDsl::find(#table::table::table(), pk), &mut connection).await.map_err(Into::into)
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})
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}
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