adding db index for GanjoorComments => CommentDate

RMuseum/DbContext/RMuseumDbContext.cs

@@ -88,6 +88,8 @@ namespace RMuseum.DbContext
             builder.Entity<GanjoorTrack>()
                 .HasIndex(c => c.Name);
 
+            builder.Entity<GanjoorComment>()
+                .HasIndex(c => c.CommentDate);
         }
 
 

RMuseum/Migrations/20210506053544_CommentDateIndex.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace RMuseum.Migrations
+{
+    public partial class CommentDateIndex : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_GanjoorComments_CommentDate",
+                table: "GanjoorComments",
+                column: "CommentDate");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_GanjoorComments_CommentDate",
+                table: "GanjoorComments");
+        }
+    }
+}

RMuseum/Migrations/RMuseumDbContextModelSnapshot.cs

@@ -406,6 +406,8 @@ namespace RMuseum.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("CommentDate");
+
                     b.HasIndex("InReplyToId");
 
                     b.HasIndex("PoemId");