Reordering API.

src/Squidex.Events/Schemas/SchemaFieldsReordered.cs

@@ -0,0 +1,19 @@
+// ==========================================================================
+//  SchemaFieldsReordered.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System.Collections.Generic;
+using Squidex.Infrastructure;
+
+namespace Squidex.Events.Schemas
+{
+    [TypeName("SchemaFieldsReorderedEvent")]
+    public class SchemaFieldsReordered : SchemaEvent
+    {
+        public List<long> FieldIds { get; set; }
+    }
+}

src/Squidex.Events/Schemas/SchemaPublished.cs

@@ -10,7 +10,7 @@ using Squidex.Infrastructure;
 
 namespace Squidex.Events.Schemas
 {
-    [TypeName("SchemaPublished")]
+    [TypeName("SchemaPublishedEvent")]
     public class SchemaPublished : SchemaEvent
     {
     }

src/Squidex.Events/Schemas/SchemaUnpublished.cs

@@ -10,7 +10,7 @@ using Squidex.Infrastructure;
 
 namespace Squidex.Events.Schemas
 {
-    [TypeName("SchemaUnpublished")]
+    [TypeName("SchemaUnpublishedEvent")]
     public class SchemaUnpublished : SchemaEvent
     {
     }

src/Squidex.Events/Schemas/Utils/SchemaEventDispatcher.cs

@@ -54,6 +54,11 @@ namespace Squidex.Events.Schemas.Utils
             return schema.Update(@event.Properties);
         }
 
+        public static Schema Dispatch(SchemaFieldsReordered @event, Schema schema)
+        {
+            return schema.ReorderFields(@event.FieldIds);
+        }
+
         public static Schema Dispatch(FieldDeleted @event, Schema schema)
         {
             return schema.DeleteField(@event.FieldId.Id);

src/Squidex.Write/Schemas/Commands/ReorderFields.cs

@@ -0,0 +1,26 @@
+// ==========================================================================
+//  ReorderFields.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System.Collections.Generic;
+using Squidex.Infrastructure;
+
+namespace Squidex.Write.Schemas.Commands
+{
+    public class ReorderFields : SchemaAggregateCommand, IValidatable
+    {
+        public List<long> FieldIds { get; set; }
+
+        public void Validate(IList<ValidationError> errors)
+        {
+            if (FieldIds == null)
+            {
+                errors.Add(new ValidationError("Field ids must be specified", nameof(FieldIds)));
+            }
+        }
+    }
+}

src/Squidex.Write/Schemas/SchemaCommandHandler.cs

@@ -90,6 +90,11 @@ namespace Squidex.Write.Schemas
             return handler.UpdateAsync<SchemaDomainObject>(context, s => s.ShowField(command));
         }
 
+        protected Task On(ReorderFields command, CommandContext context)
+        {
+            return handler.UpdateAsync<SchemaDomainObject>(context, s => s.Reorder(command));
+        }
+
         protected Task On(UpdateSchema command, CommandContext context)
         {
             return handler.UpdateAsync<SchemaDomainObject>(context, s => s.Update(command));

src/Squidex.Write/Schemas/SchemaDomainObject.cs

@@ -91,6 +91,11 @@ namespace Squidex.Write.Schemas
             schema = SchemaEventDispatcher.Dispatch(@event, schema);
         }
 
+        protected void On(SchemaFieldsReordered @event)
+        {
+            schema = SchemaEventDispatcher.Dispatch(@event, schema);
+        }
+
         protected void On(SchemaPublished @event)
         {
             schema = SchemaEventDispatcher.Dispatch(@event, schema);
@@ -112,7 +117,7 @@ namespace Squidex.Write.Schemas
 
             VerifyCreatedAndNotDeleted();
 
-            RaiseEvent(SimpleMapper.Map(command, new FieldAdded { FieldId = new NamedId<long>(++totalFields, command.Name) }));
+            RaiseEvent(SimpleMapper.Map(command, new FieldAdded { FieldId = new NamedId<long>(totalFields + 1, command.Name) }));
 
             return this;
         }
@@ -139,6 +144,17 @@ namespace Squidex.Write.Schemas
             return this;
         }
 
+        public SchemaDomainObject Reorder(ReorderFields command)
+        {
+            Guard.Valid(command, nameof(command), () => $"Cannot reorder fields for schema '{Id}'");
+
+            VerifyCreatedAndNotDeleted();
+
+            RaiseEvent(SimpleMapper.Map(command, new SchemaFieldsReordered()));
+
+            return this;
+        }
+
         public SchemaDomainObject Update(UpdateSchema command)
         {
             Guard.Valid(command, nameof(command), () => $"Cannot update schema '{Id}'");

src/Squidex/Controllers/Api/Schemas/Models/ReorderFieldsDto.cs

@@ -0,0 +1,22 @@
+// ==========================================================================
+//  ReorderFieldsDto.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Squidex.Controllers.Api.Schemas.Models
+{
+    public class ReorderFieldsDto
+    {
+        /// <summary>
+        /// The field ids in the target order.
+        /// </summary>
+        [Required]
+        public List<long> FieldIds { get; set; }
+    }
+}

src/Squidex/Controllers/Api/Schemas/SchemaFieldsController.cs

@@ -40,9 +40,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
         /// 201 => Schema field created.
-        /// 409 => Schema field name already in use.
-        /// 404 => App or schema not found.
         /// 400 => Schema field properties not valid.
+        /// 404 => Schema or app not found.
+        /// 409 => Schema field name already in use.
         /// </returns>
         [HttpPost]
         [Route("apps/{app}/schemas/{name}/fields/")]
@@ -61,6 +61,29 @@ namespace Squidex.Controllers.Api.Schemas
             return StatusCode(201, response);
         }
 
+        /// <summary>
+        /// Reorders the fields.
+        /// </summary>
+        /// <param name="app">The name of the app.</param>
+        /// <param name="name">The name of the schema.</param>
+        /// <param name="request">The request that contains the field ids.</param>
+        /// <returns>
+        /// 204 => Schema fields reorderd.
+        /// 400 => Schema field ids do not cover the fields of the schema.
+        /// 404 => Schema or app not found.
+        /// </returns>
+        [HttpPost]
+        [Route("apps/{app}/schemas/{name}/fields/ordering")]
+        [ProducesResponseType(typeof(ErrorDto), 400)]
+        public async Task<IActionResult> PutFieldOrdering(string app, string name, [FromBody] ReorderFields request)
+        {
+            var command = new ReorderFields { FieldIds = request.FieldIds };
+
+            await CommandBus.PublishAsync(command);
+
+            return NoContent();
+        }
+
         /// <summary>
         /// Update a schema field.
         /// </summary>
@@ -69,10 +92,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="id">The id of the field to update.</param>
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
-        /// 204 => Schema field created.
-        /// 409 => Schema field name already in use.
-        /// 404 => App, schema or field not found.
+        /// 204 => Schema field updated.
         /// 400 => Schema field properties not valid.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/schemas/{name}/fields/{id:long}/")]
@@ -94,9 +116,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema.</param>
         /// <param name="id">The id of the field to hide.</param>
         /// <returns>
-        /// 400 => Schema field already hidden.
         /// 204 => Schema field hidden.
-        /// 404 => App, schema or field not found.
+        /// 400 => Schema field already hidden.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
         /// A hidden field is not part of the API response, but can still be edited in the portal.
@@ -120,9 +142,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema.</param>
         /// <param name="id">The id of the field to shows.</param>
         /// <returns>
-        /// 400 => Schema field already visible.
         /// 204 => Schema field shown.
-        /// 404 => App, schema or field not found.
+        /// 400 => Schema field already visible.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
         /// A hidden field is not part of the API response, but can still be edited in the portal.
@@ -146,9 +168,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema.</param>
         /// <param name="id">The id of the field to enable.</param>
         /// <returns>
-        /// 400 => Schema field already enabled.
         /// 204 => Schema field enabled.
-        /// 404 => App, schema or field not found.
+        /// 400 => Schema field already enabled.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
         /// A disabled field cannot not be edited in the squidex portal anymore,
@@ -173,9 +195,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema.</param>
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
-        /// 400 => Schema field already disabled.
         /// 204 => Schema field disabled.
-        /// 404 => App, schema or field not found.
+        /// 400 => Schema field already disabled.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
         /// A disabled field cannot not be edited in the squidex portal anymore,
@@ -201,7 +223,7 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
         /// 204 => Schema field deleted.
-        /// 404 => App, schema or field not found.
+        /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpDelete]
         [Route("apps/{app}/schemas/{name}/fields/{id:long}/")]

src/Squidex/Controllers/Api/Schemas/SchemasController.cs

@@ -46,6 +46,7 @@ namespace Squidex.Controllers.Api.Schemas
         /// </summary>
         /// <returns>
         /// 200 => Schemas returned.
+        /// 404 => App not found.
         /// </returns>
         [HttpGet]
         [Route("apps/{app}/schemas/")]
@@ -65,7 +66,7 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema to retrieve.</param>
         /// <returns>
         /// 200 => Schema found.
-        /// 404 => Schema not found.
+        /// 404 => Schema or app not found.
         /// </returns>
         [HttpGet]
         [Route("apps/{app}/schemas/{name}/")]
@@ -93,7 +94,7 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="app">The name of the app to create the schema to.</param>
         /// <returns>
         /// 201 => Schema created.  
-        /// 400 => Schema name is not valid.
+        /// 400 => Schema name or properties are not valid.
         /// 409 => Schema name already in use.
         /// </returns>
         [HttpPost]
@@ -117,7 +118,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema.</param>
         /// <param name="request">The schema object that needs to updated.</param>
         /// <returns>
-        /// 204 => Schema updated.
+        /// 204 => Schema has been updated.
+        /// 400 => Schema properties are not valid.
+        /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/schemas/{name}/")]
@@ -136,8 +139,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="app">The app where the schema is a part of.</param>
         /// <param name="name">The name of the schema to publish.</param>
         /// <returns>
+        /// 204 => Schema has been published.
         /// 400 => Schema is already published.
-        /// 204 => Schema has been deleted.
+        /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/schemas/{name}/publish")]
@@ -155,8 +159,9 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="app">The app where the schema is a part of.</param>
         /// <param name="name">The name of the schema to unpublish.</param>
         /// <returns>
+        /// 204 => Schema has been unpublished.
         /// 400 => Schema is not published.
-        /// 204 => Schema has been deleted.
+        /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/schemas/{name}/unpublish")]
@@ -175,6 +180,7 @@ namespace Squidex.Controllers.Api.Schemas
         /// <param name="name">The name of the schema to delete.</param>
         /// <returns>
         /// 204 => Schema has been deleted.
+        /// 404 => Schema or app not found.
         /// </returns>
         [HttpDelete]
         [Route("apps/{app}/schemas/{name}/")]

tests/Squidex.Write.Tests/Schemas/SchemaCommandHandlerTests.cs

@@ -7,6 +7,7 @@
 // ==========================================================================
 
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using Moq;
 using Squidex.Core.Schemas;
@@ -84,6 +85,19 @@ namespace Squidex.Write.Schemas
             });
         }
 
+        [Fact]
+        public async Task ReorderSchema_should_update_domain_object()
+        {
+            CreateSchema();
+
+            var context = CreateContextForCommand(new ReorderFields { FieldIds = new List<long>() });
+
+            await TestUpdate(schema, async _ =>
+            {
+                await sut.HandleAsync(context);
+            });
+        }
+
         [Fact]
         public async Task PublishSchema_should_update_domain_object()
         {

tests/Squidex.Write.Tests/Schemas/SchemaDomainObjectTests.cs

@@ -6,6 +6,7 @@
 //  All rights reserved.
 // ==========================================================================
 
+using System.Collections.Generic;
 using System.Linq;
 using Squidex.Core.Schemas;
 using Squidex.Events.Schemas;
@@ -68,6 +69,7 @@ namespace Squidex.Write.Schemas
                     CreateEvent(new SchemaCreated { Name = SchemaName, Properties = properties })
                 );
         }
+
         [Fact]
         public void Update_should_throw_if_not_created()
         {
@@ -83,9 +85,9 @@ namespace Squidex.Write.Schemas
             CreateSchema();
             DeleteSchema();
 
-            Assert.Throws<ValidationException>(() =>
+            Assert.Throws<DomainException>(() =>
             {
-                sut.Update(CreateCommand(new UpdateSchema()));
+                sut.Update(CreateCommand(new UpdateSchema { Properties = new SchemaProperties() }));
             });
         }
 
@@ -117,6 +119,58 @@ namespace Squidex.Write.Schemas
                 );
         }
 
+        [Fact]
+        public void Reorder_should_throw_if_not_created()
+        {
+            Assert.Throws<DomainException>(() =>
+            {
+                sut.Reorder(CreateCommand(new ReorderFields { FieldIds = new List<long>() }));
+            });
+        }
+
+        [Fact]
+        public void Reorder_should_throw_if_schema_is_deleted()
+        {
+            CreateSchema();
+            DeleteSchema();
+
+            Assert.Throws<DomainException>(() =>
+            {
+                sut.Reorder(CreateCommand(new ReorderFields { FieldIds = new List<long>() }));
+            });
+        }
+
+        [Fact]
+        public void Reorder_should_throw_if_command_is_not_valid()
+        {
+            CreateSchema();
+
+            Assert.Throws<ValidationException>(() =>
+            {
+                sut.Reorder(CreateCommand(new ReorderFields()));
+            });
+        }
+
+        [Fact]
+        public void Reorder_should_refresh_properties_and_create_events()
+        {
+            var fieldIds = new List<long> { 1, 2 };
+
+            CreateSchema();
+
+            sut.AddField(new AddField { Name = "field1", Properties = new StringFieldProperties() });
+            sut.AddField(new AddField { Name = "field2", Properties = new StringFieldProperties() });
+
+            ((IAggregate)sut).ClearUncommittedEvents();
+
+            sut.Reorder(CreateCommand(new ReorderFields { FieldIds = fieldIds }));
+
+            sut.GetUncomittedEvents()
+                .ShouldHaveSameEvents(
+                    CreateEvent(new SchemaFieldsReordered { FieldIds = fieldIds })
+                );
+        }
+
         [Fact]
         public void Publish_should_throw_if_not_created()
         {