相关bug调整

SimpleAdmin.Application/Services/Onboarding/EntryConfig/OnboardingEntryConfigService.cs

@@ -27,8 +27,12 @@ public class OnboardingEntryConfigService : IOnboardingEntryConfigService
     /// </summary>
     public async Task SaveFormField(OnboardingFormFieldSaveInput input)
     {
-        var fieldCodeExists = await _db.Queryable<ObFormField>()
-            .AnyAsync(x => x.FieldCode == input.FieldCode && x.Id != input.Id);
+        var fieldCodeQuery = _db.Queryable<ObFormField>()
+            .Where(x => x.FieldCode == input.FieldCode);
+        if (input.Id.HasValue)
+            fieldCodeQuery = fieldCodeQuery.Where(x => x.Id != input.Id.Value);
+
+        var fieldCodeExists = await fieldCodeQuery.AnyAsync();
         if (fieldCodeExists)
             throw Oops.Bah("字段编码已存在");
 
@@ -38,7 +42,7 @@ public class OnboardingEntryConfigService : IOnboardingEntryConfigService
             FieldCode = input.FieldCode,
             FieldName = input.FieldName,
             DataType = input.DataType,
-            OptionsJson = input.OptionsJson,
+            OptionsJson = NormalizeOptionsJson(input.OptionsJson),
             ValidationRule = input.ValidationRule,
             Placeholder = input.Placeholder,
             Status = input.Status
@@ -57,6 +61,27 @@ public class OnboardingEntryConfigService : IOnboardingEntryConfigService
         await _db.Insertable(entity).ExecuteCommandAsync();
     }
 
+    /// <summary>
+    /// 将空白的可选项转换为 null，避免 MySQL JSON 字段写入空字符串时报错。
+    /// </summary>
+    private static string NormalizeOptionsJson(string optionsJson)
+    {
+        if (string.IsNullOrWhiteSpace(optionsJson))
+            return null;
+
+        var normalizedJson = optionsJson.Trim();
+
+        try
+        {
+            using var jsonDocument = global::System.Text.Json.JsonDocument.Parse(normalizedJson);
+            return normalizedJson;
+        }
+        catch (global::System.Text.Json.JsonException)
+        {
+            throw Oops.Bah("可选项不是有效的 JSON 格式");
+        }
+    }
+
     /// <summary>
     /// 删除未被填写要求引用的动态字段。
     /// </summary>