关注列表/点赞列表/fork列表的后端

db/migrate/20200515080705_add_created_at_to_watcher.rb

@@ -0,0 +1,6 @@
+class AddCreatedAtToWatcher < ActiveRecord::Migration[5.2]
+  def change
+    add_column :watchers, :created_at, :datetime
+    Watcher.update_all(created_at: Time.current)
+  end
+end

db/migrate/20200515082628_create_fork_users.rb

@@ -0,0 +1,17 @@
+class CreateForkUsers < ActiveRecord::Migration[5.2]
+  def change
+    create_table :fork_users do |t|
+      t.integer :project_id  #原始项目id
+      t.integer :fork_project_id  #fork后的项目id
+      t.integer :user_id   #fork用户的id
+      t.timestamps
+    end
+    add_index :fork_users, :project_id
+    add_index :fork_users, :user_id
+
+    projects = Project.where.not(forked_from_project_id: [nil, ""])
+    projects.each do |p|
+      ForkUser.create(project_id: p.forked_from_project_id, fork_project_id: p.id, user_id: p.user_id)
+    end
+  end
+end