refactor(drop-topic): remove from table

Author: mydearxym

priv/repo/migrations/20210426082529_remove_topic_tables.exs

@@ -0,0 +1,20 @@
+defmodule GroupherServer.Repo.Migrations.RemoveTopicTables do
+  use Ecto.Migration
+
+  def change do
+    alter table(:tags) do
+      remove(:topic_id)
+    end
+
+    drop(unique_index(:pined_posts, [:post_id, :community_id, :topic_id]))
+
+    alter table(:pined_posts) do
+      remove(:topic_id)
+    end
+
+    create(unique_index(:pined_posts, [:post_id, :community_id]))
+
+    drop(table(:posts_topics))
+    drop(table(:topics))
+  end
+end