Only display "Project code already used" if we're certain. (#1600)

Author: myieye

backend/LexData/DbError.cs

@@ -8,6 +8,7 @@ public enum DbErrorCode
 {
     Unknown,
     Duplicate,
+    DuplicateProjectCode,
 }
 
 public class DbError
@@ -19,9 +20,10 @@ public static DbError CreateErrorFrom(NpgsqlException exception)
 
     public static DbError CreateErrorFrom(PostgresException exception)
     {
-        return exception.SqlState switch
+        return exception switch
         {
-            PostgresErrorCodes.UniqueViolation => new DbError($"{exception.TableName.Humanize().Singularize(false)} already exists", DbErrorCode.Duplicate),
+            { SqlState: PostgresErrorCodes.UniqueViolation, ConstraintName: "IX_Projects_Code" } => new DbError($"{exception.TableName.Humanize().Singularize(false)} already exists", DbErrorCode.DuplicateProjectCode),
+            { SqlState: PostgresErrorCodes.UniqueViolation } => new DbError($"{exception.TableName.Humanize().Singularize(false)} already exists", DbErrorCode.Duplicate),
             _ => new DbError(exception.Message)
         };
     }
@@ -44,4 +46,4 @@ public DbError(string message, DbErrorCode code = DbErrorCode.Unknown)
 
     public string Message { get; }
     public DbErrorCode Code { get; }
-}
+}

frontend/schema.graphql

@@ -1205,6 +1205,7 @@ enum CreateProjectResult {
 enum DbErrorCode {
   UNKNOWN
   DUPLICATE
+  DUPLICATE_PROJECT_CODE
 }
 
 enum FeatureFlag {

frontend/src/routes/(authenticated)/project/create/+page.svelte

@@ -65,7 +65,7 @@
       forceDraft
     });
     if (result.error) {
-      if (result.error.byCode(DbErrorCode.Duplicate)) {
+      if (result.error.byCode(DbErrorCode.DuplicateProjectCode)) {
         $errors.code = [$t('project.create.code_exists')];
       } else {
         $message = result.error.message;