From c2baa86c09a56a267b166a004a6dca7d332a99d9 Mon Sep 17 00:00:00 2001
From: Karina Kwiatek <kjk@kjk.dog>
Date: Sun, 29 Jan 2023 00:56:47 +0100
Subject: [PATCH] Add `pinned_at` to answers

---
 app/models/answer.rb                                  | 4 ++++
 db/migrate/20230128233136_add_pinned_at_to_answers.rb | 8 ++++++++
 db/schema.rb                                          | 2 ++
 3 files changed, 14 insertions(+)
 create mode 100644 db/migrate/20230128233136_add_pinned_at_to_answers.rb

diff --git a/app/models/answer.rb b/app/models/answer.rb
index 91a6c956..d1e3e645 100644
--- a/app/models/answer.rb
+++ b/app/models/answer.rb
@@ -14,6 +14,8 @@ class Answer < ApplicationRecord
   validates :question_id, uniqueness: { scope: :user_id }
   # rubocop:enable Rails/UniqueValidationWithoutIndex
 
+  scope :pinned, -> { where.not(pinned_at: nil) }
+
   SHORT_ANSWER_MAX_LENGTH = 640
 
   # rubocop:disable Rails/SkipsModelValidations
@@ -56,4 +58,6 @@ class Answer < ApplicationRecord
   end
 
   def long? = content.length > SHORT_ANSWER_MAX_LENGTH
+
+  def pinned? = pinned_at.present?
 end
diff --git a/db/migrate/20230128233136_add_pinned_at_to_answers.rb b/db/migrate/20230128233136_add_pinned_at_to_answers.rb
new file mode 100644
index 00000000..8501ba1e
--- /dev/null
+++ b/db/migrate/20230128233136_add_pinned_at_to_answers.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class AddPinnedAtToAnswers < ActiveRecord::Migration[6.1]
+  def change
+    add_column :answers, :pinned_at, :timestamp
+    add_index :answers, %i[user_id pinned_at]
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 0d70a9eb..33418a33 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -48,8 +48,10 @@ ActiveRecord::Schema.define(version: 2023_02_12_181044) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer "smile_count", default: 0, null: false
+    t.datetime "pinned_at"
     t.index ["question_id"], name: "index_answers_on_question_id"
     t.index ["user_id", "created_at"], name: "index_answers_on_user_id_and_created_at"
+    t.index ["user_id", "pinned_at"], name: "index_answers_on_user_id_and_pinned_at"
   end
 
   create_table "appendables", force: :cascade do |t|