Get the tags into the database with a raw curl.

app/controllers/api/v1/lists/accounts_controller.rb

@@ -32,6 +32,7 @@ class Api::V1::Lists::AccountsController < Api::BaseController
   private
 
   def set_list
+    Rails.logger.warn "This is concerning! #{current_account} and #{params}"
     @list = List.where(account: current_account).find(params[:list_id])
   end
 

app/controllers/api/v1/lists/tags_controller.rb

@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+class Api::V1::Lists::TagsController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read, :'read:lists' }, only: [:show]
+  before_action -> { doorkeeper_authorize! :write, :'write:lists' }, except: [:show]
+
+  before_action :require_user!
+  before_action :set_list
+
+  after_action :insert_pagination_headers, only: :show
+
+  def show
+    @tags = load_tags
+    render json: @tags, each_serializer: REST::TagSerializer
+  end
+
+  def create
+    ApplicationRecord.transaction do
+      list_tags.each do |tag|
+        @list.tags << tag
+      end
+    end
+
+    render_empty
+  end
+
+  def destroy
+    ListTag.where(list: @list, tag_id: tag_id).destroy_all
+    render_empty
+  end
+
+  private
+
+  def set_list
+    Rails.logger.warn "This is tagged concerning! #{current_account} and #{params}"
+    @list = List.where(account: current_account).find(params[:list_id])
+  end
+
+  def load_tags
+    if unlimited?
+      @list.tags.all
+    else
+      @list.tags.paginate_by_max_id(limit_param(DEFAULT_TAGS_LIMIT), params[:max_id], params[:since_id])
+    end
+  end
+
+  def list_tags
+    Tag.find(tag_ids)
+  end
+
+  def tag_ids
+    Array(resource_params[:tag_ids])
+  end
+
+  def resource_params
+    params.permit(tag_ids: [])
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    return if unlimited?
+
+    api_v1_list_tags_url pagination_params(max_id: pagination_max_id) if records_continue?
+  end
+
+  def prev_path
+    return if unlimited?
+
+    api_v1_list_tags_url pagination_params(since_id: pagination_since_id) unless @tags.empty?
+  end
+
+  def pagination_max_id
+    @tags.last.id
+  end
+
+  def pagination_since_id
+    @tags.first.id
+  end
+
+  def records_continue?
+    @tags.size == limit_param(DEFAULT_TAGS_LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.slice(:limit).permit(:limit).merge(core_params)
+  end
+
+  def unlimited?
+    params[:limit] == '0'
+  end
+end

app/models/list.rb

@@ -25,6 +25,9 @@ class List < ApplicationRecord
   has_many :list_accounts, inverse_of: :list, dependent: :destroy
   has_many :accounts, through: :list_accounts
 
+  has_many :list_tags, inverse_of: :list, dependent: :destroy
+  has_many :tags, through: :list_tags
+
   validates :title, presence: true
 
   validates_each :account_id, on: :create do |record, _attr, value|

app/models/list_tag.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: list_tag
+#
+#  id                :bigint(8)        not null, primary key
+#  list_id           :bigint(8)        not null
+#  tag_id            :bigint(8)        not null
+#
+
+class ListTag < ApplicationRecord
+  belongs_to :list
+  belongs_to :tag
+
+  validates :tag_id, uniqueness: { scope: :list_id }
+
+  private
+
+end

app/models/user.rb

@@ -14,7 +14,6 @@
 #  sign_in_count             :integer          default(0), not null
 #  current_sign_in_at        :datetime
 #  last_sign_in_at           :datetime
-#  admin                     :boolean          default(FALSE), not null
 #  confirmation_token        :string
 #  confirmed_at              :datetime
 #  confirmation_sent_at      :datetime
@@ -29,7 +28,6 @@
 #  otp_backup_codes          :string           is an Array
 #  account_id                :bigint(8)        not null
 #  disabled                  :boolean          default(FALSE), not null
-#  moderator                 :boolean          default(FALSE), not null
 #  invite_id                 :bigint(8)
 #  chosen_languages          :string           is an Array
 #  created_by_application_id :bigint(8)

config/routes/api.rb

@@ -204,7 +204,8 @@ namespace :api, format: false do
     resources :followed_tags, only: [:index]
 
     resources :lists, only: [:index, :create, :show, :update, :destroy] do
-      resource :accounts, only: [:show, :create, :destroy], controller: 'lists/accounts'
+        resource :accounts, only: [:show, :create, :destroy], controller: 'lists/accounts'
+        resource :tags, only: [:show, :create, :destroy], controller: 'lists/tags'
     end
 
     namespace :featured_tags do

db/migrate/20240309162900_list_tags.rb

@@ -0,0 +1,11 @@
+class ListTags < ActiveRecord::Migration[7.1]
+  def change
+      create_table :list_tags do |t|
+        t.belongs_to :list, foreign_key: { on_delete: :cascade }, null: false
+        t.belongs_to :tag, foreign_key: { on_delete: :cascade }, null: false
+      end
+  
+      add_index :list_tags, [:tag_id, :list_id], unique: true
+      add_index :list_tags, [:list_id, :tag_id]
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
+ActiveRecord::Schema[7.1].define(version: 2024_03_09_162900) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -584,6 +584,15 @@ ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
     t.index ["list_id", "account_id"], name: "index_list_accounts_on_list_id_and_account_id"
   end
 
+  create_table "list_tags", force: :cascade do |t|
+    t.bigint "list_id", null: false
+    t.bigint "tag_id", null: false
+    t.index ["list_id", "tag_id"], name: "index_list_tags_on_list_id_and_tag_id"
+    t.index ["list_id"], name: "index_list_tags_on_list_id"
+    t.index ["tag_id", "list_id"], name: "index_list_tags_on_tag_id_and_list_id", unique: true
+    t.index ["tag_id"], name: "index_list_tags_on_tag_id"
+  end
+
   create_table "lists", force: :cascade do |t|
     t.bigint "account_id", null: false
     t.string "title", default: "", null: false
@@ -1248,6 +1257,8 @@ ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
   add_foreign_key "list_accounts", "follow_requests", on_delete: :cascade
   add_foreign_key "list_accounts", "follows", on_delete: :cascade
   add_foreign_key "list_accounts", "lists", on_delete: :cascade
+  add_foreign_key "list_tags", "lists", on_delete: :cascade
+  add_foreign_key "list_tags", "tags", on_delete: :cascade
   add_foreign_key "lists", "accounts", on_delete: :cascade
   add_foreign_key "login_activities", "users", on_delete: :cascade
   add_foreign_key "markers", "users", on_delete: :cascade