add user follow feature

db/migrate/20220227175028_create_user_follows.rb

@@ -0,0 +1,10 @@
+class CreateUserFollows < ActiveRecord::Migration[7.0]
+  def change
+    create_table :user_follows do |t|
+      t.references :follower, references: :users, foreign_key: { to_table: :users }
+      t.references :followed, references: :users, foreign_key: { to_table: :users }
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,10 +10,19 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2022_02_27_172543) do
+ActiveRecord::Schema[7.0].define(version: 2022_02_27_175028) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
+  create_table "user_follows", force: :cascade do |t|
+    t.bigint "follower_id"
+    t.bigint "followed_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["followed_id"], name: "index_user_follows_on_followed_id"
+    t.index ["follower_id"], name: "index_user_follows_on_follower_id"
+  end
+
   create_table "users", force: :cascade do |t|
     t.string "username", limit: 14, null: false
     t.datetime "created_at", null: false
@@ -21,4 +30,6 @@ ActiveRecord::Schema[7.0].define(version: 2022_02_27_172543) do
     t.index ["username"], name: "index_users_on_username"
   end
 
+  add_foreign_key "user_follows", "users", column: "followed_id"
+  add_foreign_key "user_follows", "users", column: "follower_id"
 end

db/seeds.rb

@@ -1,3 +1,6 @@
-User.find_or_create_by(username: 'xpto')
 User.find_or_create_by(username: 'admin')
-User.find_or_create_by(username: 'geonizeli')
+xpto = User.find_or_create_by(username: 'xpto')
+geonizeli = User.find_or_create_by(username: 'geonizeli')
+
+UserFollow.find_or_create_by(follower_id: xpto.id, followed_id: geonizeli.id)
+UserFollow.find_or_create_by(follower_id: geonizeli.id, followed_id: xpto.id)