Debugging default value

src/db_enum/generate.rs

@@ -96,7 +96,7 @@ pub fn generate(
 
     let fn_is_none = super::utils::render_fn_is_none();
 
-    let default_value = super::utils::get_default_value(enum_name);
+    let default_value = super::utils::get_default_value(enum_name, enum_cases.as_slice())?;
 
     let result = quote! {
 

src/db_enum/generate_as_string.rs

@@ -13,7 +13,7 @@ pub fn generate_as_string(ast: &syn::DeriveInput) -> Result<proc_macro::TokenStr
 
     let fn_is_none = super::utils::render_fn_is_none();
 
-    let default_value = super::utils::get_default_value(enum_name);
+    let default_value = super::utils::get_default_value(enum_name, enum_cases.as_slice())?;
 
     let result = quote! {
 

src/db_enum/utils.rs

@@ -1,6 +1,9 @@
 use std::str::FromStr;
 
 use proc_macro2::{Ident, TokenStream};
+use types_reader::EnumCase;
+
+use crate::postgres_enum_ext::PostgresEnumExt;
 
 pub fn render_reading_db_row_metadata_model() -> proc_macro2::TokenStream {
     quote::quote! {
@@ -48,15 +51,28 @@ pub fn render_fn_is_none() -> proc_macro2::TokenStream {
     }
 }
 
-pub fn get_default_value(enum_name: &Ident) -> proc_macro2::TokenStream {
+pub fn get_default_value(
+    enum_name: &Ident,
+    enum_cases: &[EnumCase],
+) -> Result<proc_macro2::TokenStream, syn::Error> {
+    for enum_case in enum_cases {
+        if enum_case.attrs.has_attr("default_value") {
+            let value = enum_case.get_case_string_value()?;
+
+            return Ok(quote::quote!(#value));
+        }
+    }
+
     let enum_name = enum_name.to_string();
 
-    TokenStream::from_str(
+    let result = TokenStream::from_str(
         format!(
-            r#"panic!("Default value is not specified for the enum [{}]");"#,
+            r#"panic!("Default value is not specified for the enum '{}'");"#,
             enum_name
         )
         .as_str(),
     )
-    .unwrap()
+    .unwrap();
+
+    Ok(result)
 }