1 files changed, 78 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Migrations/20200810170533_MakePostAuthorOptional.cs b/BackEnd/Timeline/Migrations/20200810170533_MakePostAuthorOptional.cs
new file mode 100644
index 00000000..b0f0bca7
--- /dev/null
+++ b/BackEnd/Timeline/Migrations/20200810170533_MakePostAuthorOptional.cs
@@ -0,0 +1,78 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Timeline.Migrations
+{
+    public partial class MakePostAuthorOptional : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.Sql(@"
+PRAGMA foreign_keys = 0;
+
+BEGIN TRANSACTION;
+
+CREATE TABLE new_timeline_posts (
+    id            INTEGER NOT NULL
+                          CONSTRAINT PK_timeline_posts PRIMARY KEY AUTOINCREMENT,
+    timeline      INTEGER NOT NULL,
+    author        INTEGER,
+    content       TEXT,
+    time          TEXT    NOT NULL,
+    last_updated  TEXT    NOT NULL,
+    local_id      INTEGER NOT NULL
+                          DEFAULT 0,
+    content_type  TEXT    NOT NULL
+                          DEFAULT '',
+    extra_content TEXT,
+    CONSTRAINT FK_timeline_posts_users_author FOREIGN KEY (
+        author
+    )
+    REFERENCES users (id),
+    CONSTRAINT FK_timeline_posts_timelines_timeline FOREIGN KEY (
+        timeline
+    )
+    REFERENCES timelines (id) ON DELETE CASCADE
+);
+
+INSERT INTO new_timeline_posts SELECT * FROM timeline_posts;
+
+DROP TABLE timeline_posts;
+
+ALTER TABLE new_timeline_posts RENAME TO timeline_posts; 
+
+CREATE INDEX IX_timeline_posts_author ON timeline_posts (author);
+
+CREATE INDEX IX_timeline_posts_timeline ON timeline_posts(timeline);
+
+PRAGMA foreign_key_check;
+
+COMMIT TRANSACTION;
+
+PRAGMA foreign_keys = 1;
+            ", true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_timeline_posts_users_author",
+                table: "timeline_posts");
+
+            migrationBuilder.AlterColumn<long>(
+                name: "author",
+                table: "timeline_posts",
+                type: "INTEGER",
+                nullable: false,
+                oldClrType: typeof(long),
+                oldNullable: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_timeline_posts_users_author",
+                table: "timeline_posts",
+                column: "author",
+                principalTable: "users",
+                principalColumn: "id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}