Fix OpenAPI for version endpoint and introduce new endpoint.

backend/src/Squidex/Areas/Api/Controllers/Contents/ContentsController.cs

@@ -218,6 +218,41 @@ namespace Squidex.Areas.Api.Controllers.Contents
             return Ok(response);
         }
 
+        /// <summary>
+        /// Get a content by version V2.
+        /// </summary>
+        /// <param name="app">The name of the app.</param>
+        /// <param name="schema">The name of the schema.</param>
+        /// <param name="id">The ID of the content to fetch.</param>
+        /// <param name="version">The version fo the content to fetch.</param>
+        /// <returns>
+        /// 200 => Content version returned.
+        /// 404 => Content, schema or app not found.
+        /// </returns>
+        /// <remarks>
+        /// You can read the generated documentation for your app at /api/content/{appName}/docs.
+        /// </remarks>
+        [HttpGet]
+        [Route("content/{app}/{schema}/{id}/v/{version}/")]
+        [ApiPermissionOrAnonymous(PermissionIds.AppContentsReadOwn)]
+        [ApiCosts(1)]
+        public async Task<IActionResult> GetContentVersionV2(string app, string schema, DomainId id, int version)
+        {
+            var content = await contentQuery.FindAsync(Context, schema, id, version, HttpContext.RequestAborted);
+
+            if (content == null)
+            {
+                return NotFound();
+            }
+
+            var response = Deferred.Response(() =>
+            {
+                return ContentDto.FromDomain(content, Resources);
+            });
+
+            return Ok(response);
+        }
+
         /// <summary>
         /// Get a content by version.
         /// </summary>
@@ -245,9 +280,12 @@ namespace Squidex.Areas.Api.Controllers.Contents
                 return NotFound();
             }
 
-            var response = ContentDto.FromDomain(content, Resources);
+            var response = Deferred.Response(() =>
+            {
+                return ContentDto.FromDomain(content, Resources).Data;
+            });
 
-            return Ok(response.Data);
+            return Ok(response);
         }
 
         /// <summary>

backend/src/Squidex/Areas/Api/Controllers/Contents/Generator/SchemasOpenApiGenerator.cs

@@ -142,6 +142,14 @@ namespace Squidex.Areas.Api.Controllers.Contents.Generator
                 .OperationSummary("Get a [schema] content item by id and version.")
                 .HasPath("version", JsonObjectType.Number, FieldDescriptions.EntityVersion)
                 .HasId()
+                .Responds(200, "Content item returned.", builder.DataSchema);
+
+            builder.AddOperation(OpenApiOperationMethod.Get, "/{id}/v/{version}")
+                .RequirePermission(PermissionIds.AppContentsReadOwn)
+                .Operation("GetVersionedV2")
+                .OperationSummary("Get a [schema] content item by id and version.")
+                .HasPath("version", JsonObjectType.Number, FieldDescriptions.EntityVersion)
+                .HasId()
                 .Responds(200, "Content item returned.", builder.ContentSchema);
 
             builder.AddOperation(OpenApiOperationMethod.Get, "/{id}/validity")