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Add custom field name tag to models #486

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Add custom field name tag to models #486

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8f3d0f1
feat: add field_name to field opts
xelab04 Mar 9, 2026
cec3f11
add tests for custom field name
xelab04 Mar 9, 2026
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22 changes: 21 additions & 1 deletion cot-codegen/src/model.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,7 @@ pub struct FieldOpts {
pub ty: syn::Type,
pub primary_key: darling::util::Flag,
pub unique: darling::util::Flag,
pub field_name: Option<String>,
}

impl FieldOpts {
Expand Down Expand Up @@ -206,7 +207,12 @@ impl FieldOpts {
self_reference: Option<&String>,
) -> Result<Field, syn::Error> {
let name = self.ident.clone().expect("Only structs are supported");
let column_name = name.unraw().to_string();

let column_name = if let Some(specified_field_name) = &self.field_name {
specified_field_name.clone()
} else {
name.unraw().to_string()
};

let (auto_value, foreign_key) = (
self.find_type("cot::db::Auto", symbol_resolver).is_some(),
Expand Down Expand Up @@ -489,6 +495,20 @@ mod tests {
assert_eq!(field.column_name, "abstract");
}

#[test]
fn field_opts_specified_field_name() {
let input: syn::Field = parse_quote! {
#[model(field_name="test_field")]
test: String
};
let field_opts = FieldOpts::from_field(&input).unwrap();
let field = field_opts
.as_field(&SymbolResolver::new(vec![]), Some(&"TestModel".to_string()))
.unwrap();
assert_eq!(field.name.to_string(), "test");
assert_eq!(field.column_name, "test_field");
}

#[test]
fn find_type_resolved() {
let input: syn::Type =
Expand Down