76 lines
2.3 KiB
Rust
76 lines
2.3 KiB
Rust
use heck::CamelCase;
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use proc_macro2::{Ident, TokenStream};
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use quote::{format_ident, quote, quote_spanned};
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use syn::{Data, DataStruct, Field, Fields, Type};
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pub fn expand_derive_active_model(ident: Ident, data: Data) -> syn::Result<TokenStream> {
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let fields = match data {
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Data::Struct(DataStruct {
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fields: Fields::Named(named),
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..
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}) => named.named,
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_ => {
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return Ok(quote_spanned! {
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ident.span() => compile_error!("you can only derive DeriveModel on structs");
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})
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}
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};
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let field: Vec<Ident> = fields
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.clone()
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.into_iter()
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.map(|Field { ident, .. }| format_ident!("{}", ident.unwrap().to_string()))
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.collect();
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let name: Vec<Ident> = fields
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.clone()
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.into_iter()
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.map(|Field { ident, .. }| format_ident!("{}", ident.unwrap().to_string().to_camel_case()))
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.collect();
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let ty: Vec<Type> = fields.into_iter().map(|Field { ty, .. }| ty).collect();
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Ok(quote!(
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#[derive(Clone, Debug)]
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pub struct ActiveModel {
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#(pub #field: sea_orm::Action<#ty>),*
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}
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impl sea_orm::ActiveModelOf<#ident> for ActiveModel {
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fn from_model(m: #ident) -> Self {
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Self::from(m)
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}
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}
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impl From<#ident> for ActiveModel {
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fn from(m: #ident) -> Self {
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Self {
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#(#field: sea_orm::Action::Set(m.#field)),*
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}
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}
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}
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impl sea_orm::ActiveModelTrait for ActiveModel {
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type Column = Column;
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fn get(&self, c: Self::Column) -> sea_orm::Action<sea_orm::Value> {
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match c {
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#(Self::Column::#name => self.#field.clone().into_action_value()),*
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}
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}
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fn set(&mut self, c: Self::Column, v: sea_orm::Value) {
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match c {
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#(Self::Column::#name => self.#field = sea_orm::Action::Set(v.unwrap())),*
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}
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}
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fn unset(&mut self, c: Self::Column) {
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match c {
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#(Self::Column::#name => self.#field = sea_orm::Action::Unset),*
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}
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}
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}
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))
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}
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