Gemfile

@@ -23,6 +23,7 @@ gem 'rubytree'
 gem 'acts_as_tenant'
 gem 'httparty'
 gem 'rswag'
+gem 'pluck_to_hash'
 
 group :development, :test do
   gem 'annotaterb'

Gemfile.lock

@@ -222,6 +222,9 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.5.9)
+    pluck_to_hash (1.0.2)
+      activerecord (>= 4.0.2)
+      activesupport (>= 4.0.2)
     pry (0.15.0)
       coderay (~> 1.1)
       method_source (~> 1.0)
@@ -413,6 +416,7 @@ DEPENDENCIES
   license_finder
   money
   pg (~> 1.1)
+  pluck_to_hash
   pry
   puma (>= 5.0)
   rack-cors

app/controllers/groups_controller.rb

@@ -4,4 +4,30 @@ class GroupsController < ApplicationController
   def index
     render json: Groups::SummaryQuery.new.call.as_json
   end
+
+  def create
+    group = Group.create!(**group_params, parent:)
+    render json: group.as_json(only: %i[id name icon color parent_id]), status: :created
+  end
+
+  def update
+    group = Group.find(params[:id])
+    group.update!(**group_params, parent:)
+    render json: group.as_json(only: %i[id name icon color parent_id]), status: :ok
+  end
+
+  def destroy
+    Group.find(params[:id]).destroy!
+    render json: {}, status: :ok
+  end
+
+  private
+
+  def parent
+    params[:group][:parent_id].present? ? Group.find(params[:group][:parent_id]) : nil
+  end
+
+  def group_params
+    params.expect(group: [:name, :icon, :color])
+  end
 end

app/models/group.rb

@@ -38,7 +38,7 @@ class Group < ApplicationRecord
 
   scope :roots, -> { where(parent_id: nil) }
 
-  has_many :guests
+  has_many :guests, dependent: :nullify
 
   def colorize_children(generation = 1)
     derived_colors = generation == 1 ? color.paint.palette.analogous(size: children.count) : color.paint.palette.decreasing_saturation

app/models/guest.rb

@@ -10,7 +10,7 @@
 #  status     :integer          default("considered")
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  group_id   :uuid             not null
+#  group_id   :uuid
 #  wedding_id :uuid             not null
 #
 # Indexes

app/queries/groups/summary_query.rb

@@ -3,29 +3,19 @@
 module Groups
   class SummaryQuery
     def call
-      ActiveRecord::Base.connection.execute(query).to_a
+      Group.left_joins(:guests).group(:id).pluck_to_hash(
-    end
+        :id,
-
+        :name,
-    private
+        :icon,
-
+        :parent_id,
-    def query
+        :color,
-      <<~SQL.squish
+        Arel.sql('count(*) filter (where status IS NOT NULL) as total'),
-        SELECT
+        Arel.sql('count(*) filter (where status = 0) as considered'),
-          groups.id,
+        Arel.sql('count(*) filter (where status = 10) as invited'),
-          groups.name,
+        Arel.sql('count(*) filter (where status = 20) as confirmed'),
-          groups.icon,
+        Arel.sql('count(*) filter (where status = 30) as declined'),
-          groups.parent_id,
+        Arel.sql('count(*) filter (where status = 40) as tentative'),
-          groups.color,
+      )
-          count(*) filter (where status IS NOT NULL) as total,
-          count(*) filter (where status = 0) as considered,
-          count(*) filter (where status = 10) as invited,
-          count(*) filter (where status = 20) as confirmed,
-          count(*) filter (where status = 30) as declined,
-          count(*) filter (where status = 40) as tentative
-        FROM groups
-        LEFT JOIN guests on groups.id = guests.group_id
-        GROUP BY groups.id
-      SQL
     end
   end
 end

config/routes.rb

@@ -13,7 +13,7 @@ Rails.application.routes.draw do
       get '/users/confirmation', to: 'users/confirmations#show', as: :confirmation
     end
 
-    resources :groups, only: :index
+    resources :groups, only: %i[index create update destroy]
     resources :guests, only: %i[index create update destroy] do
       post :bulk_update, on: :collection
     end

db/migrate/20241208102932_allow_ungrouped_guests.rb

@@ -0,0 +1,7 @@
+# Copyright (C) 2024 Manuel Bustillo
+
+class AllowUngroupedGuests < ActiveRecord::Migration[8.0]
+  def change
+    change_column_null :guests, :group_id, true
+  end
+end

db/schema.rb

@@ -12,7 +12,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2024_12_07_112305) do
+ActiveRecord::Schema[8.0].define(version: 2024_12_08_102932) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -48,7 +48,7 @@ ActiveRecord::Schema[8.0].define(version: 2024_12_07_112305) do
     t.string "phone"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.uuid "group_id", null: false
+    t.uuid "group_id"
     t.integer "status", default: 0
     t.string "name"
     t.uuid "wedding_id", null: false

spec/requests/groups_spec.rb

@@ -31,5 +31,72 @@ RSpec.describe 'groups', type: :request do
       end
       regular_api_responses
     end
+
+    post('create group') do
+      tags 'Groups'
+      consumes 'application/json'
+      produces 'application/json'
+      parameter Swagger::Schema::SLUG
+      parameter name: :body, in: :body, schema: {
+        type: :object,
+        required: %i[group],
+        properties: {
+          group: {
+            type: :object,
+            required: %i[name],
+            properties: Swagger::Schema::GROUP
+          }
+        }
+      }
+      response(201, 'created') do
+        schema type: :object, properties: {
+          id: { type: :string, format: :uuid, required: true },
+          **Swagger::Schema::GROUP
+        }
+
+        xit
+      end
+      regular_api_responses
+    end
+
+    path '/{slug}/groups/{id}' do
+      put('update group') do
+        tags 'Groups'
+        consumes 'application/json'
+        produces 'application/json'
+        parameter Swagger::Schema::SLUG
+        parameter name: :id, in: :path, type: :string, format: :uuid
+        parameter name: :body, in: :body, schema: {
+          type: :object,
+          required: %i[group],
+          properties: {
+            group: {
+              type: :object,
+              required: %i[name],
+              properties: Swagger::Schema::GROUP
+            }
+          }
+        }
+        response(200, 'updated') do
+          schema type: :object, properties: {
+            id: { type: :string, format: :uuid, required: true },
+            **Swagger::Schema::GROUP
+          }
+
+          xit
+        end
+        regular_api_responses
+      end
+
+      delete('delete group') do
+        tags 'Groups'
+        produces 'application/json'
+        parameter Swagger::Schema::SLUG
+        parameter name: :id, in: :path, type: :string, format: :uuid
+        
+        response_empty_200
+        regular_api_responses
+      end
+    end
   end
 end

spec/requests/schemas.rb

@@ -4,10 +4,16 @@ module Swagger
   module Schema
     USER = {
       id: { type: :string, format: :uuid },
-                  email: { type: :string, format: :email },
+      email: { type: :string, format: :email },
-                  created_at: SwaggerResponseHelper::TIMESTAMP,
+      created_at: SwaggerResponseHelper::TIMESTAMP,
-                  updated_at: SwaggerResponseHelper::TIMESTAMP
+      updated_at: SwaggerResponseHelper::TIMESTAMP
-            
+    }
+
+    GROUP = {
+      name: { type: :string },
+      icon: { type: :string, example: 'pi pi-crown', description: 'The CSS classes used by the icon' },
+      parent_id: { type: :string, format: :uuid },
+      color: { type: :string, pattern: '^#(?:[0-9a-fA-F]{3}){1,2}$' }
     }
 
     SLUG = {