Remove description for merged filter fields.

backend/src/Squidex.Infrastructure/Queries/FilterSchema.cs

@@ -88,10 +88,14 @@ namespace Squidex.Infrastructure.Queries
             {
                 var firstType = group.First().Schema.Type;
 
-                if (group.All(x => x.Schema.Type == firstType))
+                if (group.Count() == 1)
                 {
                     return group.Take(1);
                 }
+                else if (group.All(x => x.Schema.Type == firstType))
+                {
+                    return group.Take(1).Select(x => x with { Description = null });
+                }
                 else
                 {
                     return Enumerable.Empty<FilterField>();

backend/tests/Squidex.Infrastructure.Tests/Queries/FilterSchemaTests.cs

@@ -77,6 +77,33 @@ namespace Squidex.Infrastructure.Queries
             Assert.Equal(expected, actual);
         }
 
+        [Fact]
+        public void Should_remove_Descriptions_for_merged_fields()
+        {
+            var schema = new FilterSchema(FilterSchemaType.Object)
+            {
+                Fields = new[]
+                {
+                    new FilterField(FilterSchema.String, "property1", "Description1"),
+                    new FilterField(FilterSchema.String, "property2", "Description2"),
+                    new FilterField(FilterSchema.String, "property2", "Description3")
+                }.ToReadonlyList()
+            };
+
+            var expected = new FilterSchema(FilterSchemaType.Object)
+            {
+                Fields = new[]
+                {
+                    new FilterField(FilterSchema.String, "property1", "Description1"),
+                    new FilterField(FilterSchema.String, "property2")
+                }.ToReadonlyList()
+            };
+
+            var actual = schema.Flatten();
+
+            Assert.Equal(expected, actual);
+        }
+
         [Fact]
         public void Should_filter_out_fields_by_predicate_when_flatten()
         {