[CLI] Fix generating Enum with variant starts with number (#1211)

sea-orm-codegen/src/entity/active_enum.rs

@@ -17,7 +17,7 @@ impl ActiveEnum {
         let enum_iden = format_ident!("{}", enum_name.to_camel_case());
         let values: Vec<String> = self.values.iter().map(|v| v.to_string()).collect();
         let variants = values.iter().map(|v| v.trim()).map(|v| {
-            if v.chars().all(|c| c.is_numeric()) {
+            if v.chars().next().map(char::is_numeric).unwrap_or(false) {
                 format_ident!("_{}", v)
             } else {
                 format_ident!("{}", v.to_camel_case())
@@ -43,3 +43,66 @@ impl ActiveEnum {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use pretty_assertions::assert_eq;
+    use sea_query::{Alias, IntoIden};
+
+    #[test]
+    fn test_enum_variant_starts_with_number() {
+        assert_eq!(
+            ActiveEnum {
+                enum_name: Alias::new("media_type").into_iden(),
+                values: vec![
+                    "UNKNOWN",
+                    "BITMAP",
+                    "DRAWING",
+                    "AUDIO",
+                    "VIDEO",
+                    "MULTIMEDIA",
+                    "OFFICE",
+                    "TEXT",
+                    "EXECUTABLE",
+                    "ARCHIVE",
+                    "3D",
+                ]
+                .into_iter()
+                .map(|variant| Alias::new(variant).into_iden())
+                .collect(),
+            }
+            .impl_active_enum(&WithSerde::None, true)
+            .to_string(),
+            quote!(
+                #[derive(Debug, Clone, PartialEq, Eq, EnumIter, DeriveActiveEnum, Copy)]
+                #[sea_orm(rs_type = "String", db_type = "Enum", enum_name = "media_type")]
+                pub enum MediaType {
+                    #[sea_orm(string_value = "UNKNOWN")]
+                    Unknown,
+                    #[sea_orm(string_value = "BITMAP")]
+                    Bitmap,
+                    #[sea_orm(string_value = "DRAWING")]
+                    Drawing,
+                    #[sea_orm(string_value = "AUDIO")]
+                    Audio,
+                    #[sea_orm(string_value = "VIDEO")]
+                    Video,
+                    #[sea_orm(string_value = "MULTIMEDIA")]
+                    Multimedia,
+                    #[sea_orm(string_value = "OFFICE")]
+                    Office,
+                    #[sea_orm(string_value = "TEXT")]
+                    Text,
+                    #[sea_orm(string_value = "EXECUTABLE")]
+                    Executable,
+                    #[sea_orm(string_value = "ARCHIVE")]
+                    Archive,
+                    #[sea_orm(string_value = "3D")]
+                    _3D,
+                }
+            )
+            .to_string()
+        )
+    }
+}