From aa456b6536f25c8a6e187b9f8d21eae30431e410 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 11:11:19 -0300
Subject: [PATCH 01/12] =?UTF-8?q?feat:=20adiciona=20estrutura=20base=20de?=
 =?UTF-8?q?=20movimenta=C3=A7=C3=B5es=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/models/feed.rb                            |  1 +
 app/models/feed_movement.rb                   | 12 ++++++
 .../20261024125351_create_feed_movements.rb   | 17 ++++++++
 db/schema.rb                                  | 17 +++++++-
 spec/factories/feed_movements.rb              | 15 +++++++
 spec/models/feed_movement_spec.rb             | 40 +++++++++++++++++++
 6 files changed, 101 insertions(+), 1 deletion(-)
 create mode 100644 app/models/feed_movement.rb
 create mode 100644 db/migrate/20261024125351_create_feed_movements.rb
 create mode 100644 spec/factories/feed_movements.rb
 create mode 100644 spec/models/feed_movement_spec.rb

diff --git a/app/models/feed.rb b/app/models/feed.rb
index 7ccd502..82250d8 100644
--- a/app/models/feed.rb
+++ b/app/models/feed.rb
@@ -1,4 +1,5 @@
 class Feed < ApplicationRecord
+  has_many :feed_movements, dependent: :restrict_with_error
   validates :name, presence: true
   validates :stock_quantity, presence: true, numericality: { greater_than_or_equal_to: 0 }
 
diff --git a/app/models/feed_movement.rb b/app/models/feed_movement.rb
new file mode 100644
index 0000000..deab914
--- /dev/null
+++ b/app/models/feed_movement.rb
@@ -0,0 +1,12 @@
+class FeedMovement < ApplicationRecord
+  belongs_to :feed
+
+  enum :movement_type, {
+    entry: "entry",
+    exit: "exit"
+  }, validate: true
+
+  validates :movement_type, presence: true
+  validates :quantity, presence: true, numericality: { greater_than: 0 }
+  validates :occurred_on, presence: true
+end
diff --git a/db/migrate/20261024125351_create_feed_movements.rb b/db/migrate/20261024125351_create_feed_movements.rb
new file mode 100644
index 0000000..1cd05b2
--- /dev/null
+++ b/db/migrate/20261024125351_create_feed_movements.rb
@@ -0,0 +1,17 @@
+class CreateFeedMovements < ActiveRecord::Migration[8.1]
+  def change
+    create_table :feed_movements, id: :uuid do |t|
+      t.references :feed, null: false, foreign_key: true, type: :uuid
+      t.string :movement_type, null: false
+      t.decimal :quantity, precision: 12, scale: 2, null: false
+      t.decimal :value, precision: 12, scale: 2
+      t.string :reason
+      t.date :occurred_on, null: false
+
+      t.timestamps
+    end
+
+    add_index :feed_movements, :movement_type
+    add_index :feed_movements, :occurred_on
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 5574f05..0c080fb 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,11 +10,25 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_10_24_090253) do
+ActiveRecord::Schema[8.1].define(version: 2026_10_24_125351) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
   enable_extension "pgcrypto"
 
+  create_table "feed_movements", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
+    t.uuid "feed_id", null: false
+    t.string "movement_type", null: false
+    t.decimal "quantity", precision: 12, scale: 2, null: false
+    t.decimal "value", precision: 12, scale: 2
+    t.string "reason"
+    t.date "occurred_on", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["feed_id"], name: "index_feed_movements_on_feed_id"
+    t.index ["movement_type"], name: "index_feed_movements_on_movement_type"
+    t.index ["occurred_on"], name: "index_feed_movements_on_occurred_on"
+  end
+
   create_table "feeds", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.string "name", null: false
     t.decimal "stock_quantity", precision: 12, scale: 2, default: "0.0", null: false
@@ -80,6 +94,7 @@
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
   end
 
+  add_foreign_key "feed_movements", "feeds"
   add_foreign_key "occupations", "groups"
   add_foreign_key "occupations", "terrains"
   add_foreign_key "sessions", "users"
diff --git a/spec/factories/feed_movements.rb b/spec/factories/feed_movements.rb
new file mode 100644
index 0000000..45aa8fa
--- /dev/null
+++ b/spec/factories/feed_movements.rb
@@ -0,0 +1,15 @@
+FactoryBot.define do
+  factory :feed_movement do
+    association :feed
+    movement_type { :entry }
+    quantity { Faker::Number.decimal(l_digits: 2, r_digits: 2) }
+    value { Faker::Number.decimal(l_digits: 3, r_digits: 2) }
+    occurred_on { Faker::Date.backward(days: 30) }
+
+    trait :exit do
+      movement_type { :exit }
+      value { nil }
+      reason { Faker::Lorem.sentence }
+    end
+  end
+end
diff --git a/spec/models/feed_movement_spec.rb b/spec/models/feed_movement_spec.rb
new file mode 100644
index 0000000..8c4d839
--- /dev/null
+++ b/spec/models/feed_movement_spec.rb
@@ -0,0 +1,40 @@
+require 'rails_helper'
+
+RSpec.describe FeedMovement, type: :model do
+  describe 'validations' do
+    it "is valid with valid attributes" do
+      movement = build(:feed_movement)
+      expect(movement).to be_valid
+    end
+
+    it "is invalid without a movement type" do
+      movement = build(:feed_movement, movement_type: nil)
+      expect(movement).to_not be_valid
+    end
+
+    it "is invalid with an invalid movement type" do
+      movement = build(:feed_movement, movement_type: "invalid_type")
+      expect(movement).to_not be_valid
+    end
+
+    it "is invalid without a quantity" do
+      movement = build(:feed_movement, quantity: nil)
+      expect(movement).to_not be_valid
+    end
+
+    it "is invalid with a zero quantity" do
+      movement = build(:feed_movement, quantity: 0)
+      expect(movement).to_not be_valid
+    end
+
+    it "is invalid with a negative quantity" do
+      movement = build(:feed_movement, quantity: -1)
+      expect(movement).to_not be_valid
+    end
+
+    it "is invalid without an occurred on date" do
+      movement = build(:feed_movement, occurred_on: nil)
+      expect(movement).to_not be_valid
+    end
+  end
+end

From 94e0ab76a80bfb660f81a7f27daa4ed5e3bdbd00 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 11:23:25 -0300
Subject: [PATCH 02/12] =?UTF-8?q?feat:=20adiciona=20regras=20das=20movimen?=
 =?UTF-8?q?ta=C3=A7=C3=B5es=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/models/feed_movement.rb       |  2 ++
 spec/factories/feed_movements.rb  |  6 ++++++
 spec/models/feed_movement_spec.rb | 28 ++++++++++++++++++++++++++--
 3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/app/models/feed_movement.rb b/app/models/feed_movement.rb
index deab914..4b9b91b 100644
--- a/app/models/feed_movement.rb
+++ b/app/models/feed_movement.rb
@@ -8,5 +8,7 @@ class FeedMovement < ApplicationRecord
 
   validates :movement_type, presence: true
   validates :quantity, presence: true, numericality: { greater_than: 0 }
+  validates :value, presence: true, numericality: { greater_than_or_equal_to: 0 }, if: :entry?
+  validates :reason, presence: true, if: :exit?
   validates :occurred_on, presence: true
 end
diff --git a/spec/factories/feed_movements.rb b/spec/factories/feed_movements.rb
index 45aa8fa..01149bb 100644
--- a/spec/factories/feed_movements.rb
+++ b/spec/factories/feed_movements.rb
@@ -6,6 +6,12 @@
     value { Faker::Number.decimal(l_digits: 3, r_digits: 2) }
     occurred_on { Faker::Date.backward(days: 30) }
 
+    trait :entry do
+      movement_type { :entry }
+      value { Faker::Number.decimal(l_digits: 3, r_digits: 2) }
+      reason { nil }
+    end
+
     trait :exit do
       movement_type { :exit }
       value { nil }
diff --git a/spec/models/feed_movement_spec.rb b/spec/models/feed_movement_spec.rb
index 8c4d839..113b4c7 100644
--- a/spec/models/feed_movement_spec.rb
+++ b/spec/models/feed_movement_spec.rb
@@ -2,8 +2,13 @@
 
 RSpec.describe FeedMovement, type: :model do
   describe 'validations' do
-    it "is valid with valid attributes" do
-      movement = build(:feed_movement)
+    it "is valid with valid entry attributes" do
+      movement = build(:feed_movement, :entry)
+      expect(movement).to be_valid
+    end
+
+    it "is valid with valid exit attributes" do
+      movement = build(:feed_movement, :exit)
       expect(movement).to be_valid
     end
 
@@ -36,5 +41,24 @@
       movement = build(:feed_movement, occurred_on: nil)
       expect(movement).to_not be_valid
     end
+
+    context "when movement type is entry" do
+      it "is invalid without a value" do
+        movement = build(:feed_movement, :entry, value: nil)
+        expect(movement).to_not be_valid
+      end
+
+      it "is invalid with a negative value" do
+        movement = build(:feed_movement, :entry, value: -1)
+        expect(movement).to_not be_valid
+      end
+    end
+
+    context "when movement type is exit" do
+      it "is invalid without a reason" do
+        movement = build(:feed_movement, :exit, reason: nil)
+        expect(movement).to_not be_valid
+      end
+    end
   end
 end

From b6f98ddbafc9366e1772ae6023d185a667621b49 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 11:41:38 -0300
Subject: [PATCH 03/12] =?UTF-8?q?feat:=20adiciona=20entrada=20de=20estoque?=
 =?UTF-8?q?=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/services/feed_movements/create_entry.rb   | 23 ++++++++
 .../feed_movements/create_entry_spec.rb       | 58 +++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 app/services/feed_movements/create_entry.rb
 create mode 100644 spec/services/feed_movements/create_entry_spec.rb

diff --git a/app/services/feed_movements/create_entry.rb b/app/services/feed_movements/create_entry.rb
new file mode 100644
index 0000000..5f26418
--- /dev/null
+++ b/app/services/feed_movements/create_entry.rb
@@ -0,0 +1,23 @@
+module FeedMovements
+  class CreateEntry
+    class << self
+      def call(feed_id:, quantity:, value:, occurred_on:)
+        ActiveRecord::Base.transaction do
+          feed = Feed.active.lock.find(feed_id)
+
+          movement = FeedMovement.create!(
+            feed: feed,
+            movement_type: :entry,
+            quantity: quantity,
+            value: value,
+            occurred_on: occurred_on
+          )
+
+          feed.update!(stock_quantity: feed.stock_quantity + quantity)
+
+          movement
+        end
+      end
+    end
+  end
+end
diff --git a/spec/services/feed_movements/create_entry_spec.rb b/spec/services/feed_movements/create_entry_spec.rb
new file mode 100644
index 0000000..82522dc
--- /dev/null
+++ b/spec/services/feed_movements/create_entry_spec.rb
@@ -0,0 +1,58 @@
+require 'rails_helper'
+
+RSpec.describe FeedMovements::CreateEntry, type: :service do
+  describe '.call' do
+    it "creates a entry movement" do
+      feed = create(:feed, stock_quantity: 100)
+      movement = described_class.call(
+        feed_id: feed.id,
+        quantity: 50,
+        value: 200,
+        occurred_on: Date.current
+      )
+      expect(movement).to be_persisted
+      expect(movement).to be_entry
+      expect(movement.feed).to eq(feed)
+      expect(movement.quantity).to eq(50)
+      expect(movement.value).to eq(200)
+      expect(movement.occurred_on).to eq(Date.current)
+    end
+
+    it "increases the feed stock quantity" do
+      feed = create(:feed, stock_quantity: 100)
+      described_class.call(
+        feed_id: feed.id,
+        quantity: 50,
+        value: 200,
+        occurred_on: Date.current
+      )
+      expect(feed.reload.stock_quantity).to eq(150)
+    end
+
+    it "does not create a movement when attributes are invalid" do
+      feed = create(:feed, stock_quantity: 100)
+      expect {
+        described_class.call(
+          feed_id: feed.id,
+          quantity: -50,
+          value: 200,
+          occurred_on: Date.current
+        )
+      }.to raise_error(ActiveRecord::RecordInvalid)
+      expect(feed.reload.stock_quantity).to eq(100)
+      expect(feed.feed_movements).to be_empty
+    end
+
+    it "raises an error when the feed is deleted" do
+      feed = create(:feed, :deleted)
+      expect {
+        described_class.call(
+          feed_id: feed.id,
+          quantity: 50,
+          value: 200,
+          occurred_on: Date.current
+        )
+      }.to raise_error(ActiveRecord::RecordNotFound)
+    end
+  end
+end

From 034b1d59662d0b5ad416fdf87dc83e54d73328e1 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 12:10:02 -0300
Subject: [PATCH 04/12] =?UTF-8?q?feat:=20adiciona=20endpoint=20de=20entrad?=
 =?UTF-8?q?a=20de=20estoque=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../api/v1/feed_movements_controller.rb       | 23 +++++++
 app/serializers/feed_movement_serializer.rb   |  3 +
 config/routes.rb                              |  4 +-
 .../v1/feed_movements/create_entry_spec.rb    | 65 +++++++++++++++++++
 4 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 app/controllers/api/v1/feed_movements_controller.rb
 create mode 100644 app/serializers/feed_movement_serializer.rb
 create mode 100644 spec/requests/api/v1/feed_movements/create_entry_spec.rb

diff --git a/app/controllers/api/v1/feed_movements_controller.rb b/app/controllers/api/v1/feed_movements_controller.rb
new file mode 100644
index 0000000..3b9c803
--- /dev/null
+++ b/app/controllers/api/v1/feed_movements_controller.rb
@@ -0,0 +1,23 @@
+module Api
+  module V1
+    class FeedMovementsController < BaseController
+      before_action :authenticate_request!
+
+      def create_entry
+        movement = FeedMovements::CreateEntry.call(
+          feed_id: params[:feed_id],
+          quantity: entry_params[:quantity],
+          value: entry_params[:value],
+          occurred_on: entry_params[:occurred_on]
+        )
+        render json: movement, serializer: FeedMovementSerializer, status: :created
+      end
+
+      private
+
+      def entry_params
+        params.require(:entry).permit(:quantity, :value, :occurred_on)
+      end
+    end
+  end
+end
diff --git a/app/serializers/feed_movement_serializer.rb b/app/serializers/feed_movement_serializer.rb
new file mode 100644
index 0000000..ac7d74d
--- /dev/null
+++ b/app/serializers/feed_movement_serializer.rb
@@ -0,0 +1,3 @@
+class FeedMovementSerializer < ActiveModel::Serializer
+  attributes :id, :feed_id, :movement_type, :quantity, :value, :reason, :occurred_on, :created_at, :updated_at
+end
diff --git a/config/routes.rb b/config/routes.rb
index e3f14e4..9d6f24a 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -27,7 +27,9 @@
 
       resources :occupations, only: [ :create ]
 
-      resources :feeds, only: [ :create, :index, :show, :update, :destroy ]
+      resources :feeds, only: [ :create, :index, :show, :update, :destroy ] do
+        post "movements/entry", to: "feed_movements#create_entry"
+      end
 
       get "health", to: "health#show"
     end
diff --git a/spec/requests/api/v1/feed_movements/create_entry_spec.rb b/spec/requests/api/v1/feed_movements/create_entry_spec.rb
new file mode 100644
index 0000000..a0729b7
--- /dev/null
+++ b/spec/requests/api/v1/feed_movements/create_entry_spec.rb
@@ -0,0 +1,65 @@
+require 'rails_helper'
+
+RSpec.describe "POST /api/v1/feeds/:feed_id/movements/entry", type: :request do
+  let (:user) { create(:user) }
+  let (:tokens) { Auth::CreateSession.call(user:) }
+
+  let(:headers) do
+    {
+      "Authorization" => "Bearer #{tokens[:access_token]}"
+    }
+  end
+
+  it "creates a entry movement for the feed" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/entry", params: { entry: {
+      quantity: 50,
+      value: 200,
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:created)
+    body = response.parsed_body
+    expect(body).to include(
+      "feed_id" => feed.id,
+      "movement_type" => "entry",
+      "quantity" => "50.0",
+      "value" => "200.0",
+      "occurred_on" => Date.current.to_s
+    )
+    expect(feed.reload.stock_quantity).to eq(150)
+  end
+
+  it "returns unprocessable entity when attributes are invalid" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/entry", params: { entry: {
+      quantity: -50,
+      value: 200,
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:unprocessable_content)
+    expect(feed.reload.stock_quantity).to eq(100)
+  end
+
+  it "returns not found when the feed does not exist" do
+    post "/api/v1/feeds/#{SecureRandom.uuid}/movements/entry", params: { entry: {
+      quantity: 50,
+      value: 200,
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:not_found)
+  end
+
+  it "returns unauthorized when no token is provided" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/entry", params: { entry: {
+      quantity: 50,
+      value: 200,
+      occurred_on: Date.current
+    } }, as: :json
+
+    expect(response).to have_http_status(:unauthorized)
+  end
+end

From 6a7a794a6dd36876007ab1f28649a47d8ba08490 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 12:33:06 -0300
Subject: [PATCH 05/12] =?UTF-8?q?feat:=20adiciona=20sa=C3=ADda=20de=20esto?=
 =?UTF-8?q?que=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/services/feed_movements/create_entry.rb   |  8 +-
 app/services/feed_movements/create_exit.rb    | 38 +++++++++
 config/locales/en.yml                         |  2 +
 config/locales/pt-BR.yml                      |  2 +
 .../feed_movements/create_exit_spec.rb        | 83 +++++++++++++++++++
 5 files changed, 129 insertions(+), 4 deletions(-)
 create mode 100644 app/services/feed_movements/create_exit.rb
 create mode 100644 spec/services/feed_movements/create_exit_spec.rb

diff --git a/app/services/feed_movements/create_entry.rb b/app/services/feed_movements/create_entry.rb
index 5f26418..aa81d6f 100644
--- a/app/services/feed_movements/create_entry.rb
+++ b/app/services/feed_movements/create_entry.rb
@@ -6,11 +6,11 @@ def call(feed_id:, quantity:, value:, occurred_on:)
           feed = Feed.active.lock.find(feed_id)
 
           movement = FeedMovement.create!(
-            feed: feed,
+            feed:,
             movement_type: :entry,
-            quantity: quantity,
-            value: value,
-            occurred_on: occurred_on
+            quantity:,
+            value:,
+            occurred_on:
           )
 
           feed.update!(stock_quantity: feed.stock_quantity + quantity)
diff --git a/app/services/feed_movements/create_exit.rb b/app/services/feed_movements/create_exit.rb
new file mode 100644
index 0000000..434793d
--- /dev/null
+++ b/app/services/feed_movements/create_exit.rb
@@ -0,0 +1,38 @@
+module FeedMovements
+  class CreateExit
+    class << self
+      def call(feed_id:, quantity:, reason:, occurred_on:)
+        ActiveRecord::Base.transaction do
+          feed = Feed.active.lock.find(feed_id)
+
+          movement = FeedMovement.new(
+            feed:,
+            movement_type: :exit,
+            quantity:,
+            reason:,
+            occurred_on:
+          )
+
+          movement.validate!
+
+          validate_stock!(feed:, quantity: movement.quantity)
+
+          movement.save!
+
+          feed.update!(stock_quantity: feed.stock_quantity - movement.quantity)
+
+          movement
+        end
+      end
+
+      private
+
+      def validate_stock!(feed:, quantity:)
+        return if feed.stock_quantity >= quantity
+
+        feed.errors.add(:stock_quantity, I18n.t("errors.feed_movements.insufficient_stock"))
+        raise ActiveRecord::RecordInvalid.new(feed)
+      end
+    end
+  end
+end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 5939c38..1785cd8 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -17,6 +17,8 @@ en:
       inactive_terrain: "The terrain is inactive."
       same_terrain: "The group is already in this terrain."
       terrain_occupied: "The terrain is occupied."
+    feed_movements:
+      insufficient_stock: "Insufficient stock for the requested quantity."
   activerecord:
     models:
       user:
diff --git a/config/locales/pt-BR.yml b/config/locales/pt-BR.yml
index bf65159..6edff15 100644
--- a/config/locales/pt-BR.yml
+++ b/config/locales/pt-BR.yml
@@ -17,6 +17,8 @@ pt-BR:
       inactive_terrain: "O terreno está inativo."
       same_terrain: "O grupo já está neste terreno."
       terrain_occupied: "O terreno está ocupado."
+    feed_movements:
+      insufficient_stock: "Estoque insuficiente para a quantidade solicitada."
   activerecord:
     errors:
       messages:
diff --git a/spec/services/feed_movements/create_exit_spec.rb b/spec/services/feed_movements/create_exit_spec.rb
new file mode 100644
index 0000000..f3791d8
--- /dev/null
+++ b/spec/services/feed_movements/create_exit_spec.rb
@@ -0,0 +1,83 @@
+require 'rails_helper'
+
+RSpec.describe FeedMovements::CreateExit, type: :service do
+  describe '.call' do
+    it "creates an exit movement" do
+      feed = create(:feed, stock_quantity: 100)
+      movement = described_class.call(
+        feed_id: feed.id,
+        quantity: 50,
+        reason: "Sold",
+        occurred_on: Date.current
+      )
+      expect(movement).to be_persisted
+      expect(movement).to be_exit
+      expect(movement.feed).to eq(feed)
+      expect(movement.quantity).to eq(50)
+      expect(movement.reason).to eq("Sold")
+      expect(movement.occurred_on).to eq(Date.current)
+    end
+
+    it "decreases the feed stock quantity" do
+      feed = create(:feed, stock_quantity: 100)
+      described_class.call(
+        feed_id: feed.id,
+        quantity: 50,
+        reason: "Sold",
+        occurred_on: Date.current
+      )
+      expect(feed.reload.stock_quantity).to eq(50)
+    end
+
+    it "allows removing the entire available stock" do
+      feed = create(:feed, stock_quantity: 100)
+      described_class.call(
+        feed_id: feed.id,
+        quantity: 100,
+        reason: "Sold",
+        occurred_on: Date.current
+      )
+      expect(feed.reload.stock_quantity).to eq(0)
+    end
+
+    it "does not allow exit movement when stock is insufficient" do
+      feed = create(:feed, stock_quantity: 30)
+      expect {
+        described_class.call(
+          feed_id: feed.id,
+          quantity: 50,
+          reason: "Sold",
+          occurred_on: Date.current
+        )
+      }.to raise_error(ActiveRecord::RecordInvalid)
+      expect(feed.reload.stock_quantity).to eq(30)
+      expect(feed.feed_movements).to be_empty
+    end
+
+    it "does not create a movement when attributes are invalid" do
+      feed = create(:feed, stock_quantity: 100)
+      expect {
+        described_class.call(
+          feed_id: feed.id,
+          quantity: -50,
+          reason: "Sold",
+          occurred_on: Date.current
+        )
+      }.to raise_error(ActiveRecord::RecordInvalid)
+      expect(feed.reload.stock_quantity).to eq(100)
+      expect(feed.feed_movements).to be_empty
+    end
+
+    it "raises an error when the feed is deleted" do
+      feed = create(:feed, :deleted)
+      expect {
+        described_class.call(
+          feed_id: feed.id,
+          quantity: 50,
+          reason: "Sold",
+          occurred_on: Date.current
+        )
+      }.to raise_error(ActiveRecord::RecordNotFound)
+    end
+  end
+end

From 5321f8c82bedacfb803a8f7de076ba96a0e6f972 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 12:39:05 -0300
Subject: [PATCH 06/12] =?UTF-8?q?feat:=20adiciona=20endpoint=20de=20sa?=
 =?UTF-8?q?=C3=ADda=20de=20estoque=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../api/v1/feed_movements_controller.rb       | 14 ++++
 config/routes.rb                              |  1 +
 .../v1/feed_movements/create_entry_spec.rb    |  2 +-
 .../api/v1/feed_movements/create_exit_spec.rb | 77 +++++++++++++++++++
 4 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100644 spec/requests/api/v1/feed_movements/create_exit_spec.rb

diff --git a/app/controllers/api/v1/feed_movements_controller.rb b/app/controllers/api/v1/feed_movements_controller.rb
index 3b9c803..e8a1bf0 100644
--- a/app/controllers/api/v1/feed_movements_controller.rb
+++ b/app/controllers/api/v1/feed_movements_controller.rb
@@ -13,11 +13,25 @@ def create_entry
         render json: movement, serializer: FeedMovementSerializer, status: :created
       end
 
+      def create_exit
+        movement = FeedMovements::CreateExit.call(
+          feed_id: params[:feed_id],
+          quantity: exit_params[:quantity],
+          reason: exit_params[:reason],
+          occurred_on: exit_params[:occurred_on]
+        )
+        render json: movement, serializer: FeedMovementSerializer, status: :created
+      end
+
       private
 
       def entry_params
         params.require(:entry).permit(:quantity, :value, :occurred_on)
       end
+
+      def exit_params
+        params.require(:exit).permit(:quantity, :reason, :occurred_on)
+      end
     end
   end
 end
diff --git a/config/routes.rb b/config/routes.rb
index 9d6f24a..63a1418 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -29,6 +29,7 @@
 
       resources :feeds, only: [ :create, :index, :show, :update, :destroy ] do
         post "movements/entry", to: "feed_movements#create_entry"
+        post "movements/exit", to: "feed_movements#create_exit"
       end
 
       get "health", to: "health#show"
diff --git a/spec/requests/api/v1/feed_movements/create_entry_spec.rb b/spec/requests/api/v1/feed_movements/create_entry_spec.rb
index a0729b7..128a5d9 100644
--- a/spec/requests/api/v1/feed_movements/create_entry_spec.rb
+++ b/spec/requests/api/v1/feed_movements/create_entry_spec.rb
@@ -30,7 +30,7 @@
     expect(feed.reload.stock_quantity).to eq(150)
   end
 
-  it "returns unprocessable entity when attributes are invalid" do
+  it "returns unprocessable content when attributes are invalid" do
     feed = create(:feed, stock_quantity: 100)
     post "/api/v1/feeds/#{feed.id}/movements/entry", params: { entry: {
       quantity: -50,
diff --git a/spec/requests/api/v1/feed_movements/create_exit_spec.rb b/spec/requests/api/v1/feed_movements/create_exit_spec.rb
new file mode 100644
index 0000000..4c1ef45
--- /dev/null
+++ b/spec/requests/api/v1/feed_movements/create_exit_spec.rb
@@ -0,0 +1,77 @@
+require 'rails_helper'
+
+RSpec.describe "POST /api/v1/feeds/:feed_id/movements/exit", type: :request do
+  let (:user) { create(:user) }
+  let (:tokens) { Auth::CreateSession.call(user:) }
+
+  let(:headers) do
+    {
+      "Authorization" => "Bearer #{tokens[:access_token]}"
+    }
+  end
+
+  it "creates an exit movement for a feed" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/exit", params: { exit: {
+      quantity: 50,
+      reason: "Sold",
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:created)
+    body = response.parsed_body
+    expect(body).to include(
+      "feed_id" => feed.id,
+      "movement_type" => "exit",
+      "quantity" => "50.0",
+      "reason" => "Sold",
+      "occurred_on" => Date.current.to_s
+    )
+    expect(feed.reload.stock_quantity).to eq(50)
+  end
+
+  it "returns unprocessable content when attributes are invalid" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/exit", params: { exit: {
+      quantity: 150,
+      reason: "Sold",
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:unprocessable_content)
+    expect(feed.reload.stock_quantity).to eq(100)
+  end
+
+  it "returns unprocessable content when stock quantity is insufficient" do
+    feed = create(:feed, stock_quantity: 30)
+    post "/api/v1/feeds/#{feed.id}/movements/exit", params: { exit: {
+      quantity: 50,
+      reason: "Sold",
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:unprocessable_content)
+    expect(feed.reload.stock_quantity).to eq(30)
+  end
+
+  it "returns not found when the feed does not exist" do
+    post "/api/v1/feeds/#{SecureRandom.uuid}/movements/exit", params: { exit: {
+      quantity: 50,
+      reason: "Sold",
+      occurred_on: Date.current
+    } }, headers: headers, as: :json
+
+    expect(response).to have_http_status(:not_found)
+  end
+
+  it "returns unauthorized when no token is provided" do
+    feed = create(:feed, stock_quantity: 100)
+    post "/api/v1/feeds/#{feed.id}/movements/exit", params: { exit: {
+      quantity: 50,
+      reason: "Sold",
+      occurred_on: Date.current
+    } }, as: :json
+
+    expect(response).to have_http_status(:unauthorized)
+  end
+end

From e2d2cd51ebb5ecdedb94de171029683e50964f31 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 15:31:19 -0300
Subject: [PATCH 07/12] =?UTF-8?q?feat:=20adiciona=20hist=C3=B3rico=20pagin?=
 =?UTF-8?q?ado=20de=20movimenta=C3=A7=C3=B5es=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/services/feed_movements/history.rb       | 15 ++++++++++++
 spec/services/feed_movements/history_spec.rb | 24 ++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 app/services/feed_movements/history.rb
 create mode 100644 spec/services/feed_movements/history_spec.rb

diff --git a/app/services/feed_movements/history.rb b/app/services/feed_movements/history.rb
new file mode 100644
index 0000000..54a2091
--- /dev/null
+++ b/app/services/feed_movements/history.rb
@@ -0,0 +1,15 @@
+module FeedMovements
+  class History
+    class << self
+      def call(feed_id:, page:, per_page:)
+        feed = Feeds::Find.call(id: feed_id)
+        scope = feed.feed_movements.order(occurred_on: :desc, created_at: :desc)
+        Pagination::Paginator.call(
+          scope:,
+          page:,
+          per_page:
+        )
+      end
+    end
+  end
+end
diff --git a/spec/services/feed_movements/history_spec.rb b/spec/services/feed_movements/history_spec.rb
new file mode 100644
index 0000000..a2662a4
--- /dev/null
+++ b/spec/services/feed_movements/history_spec.rb
@@ -0,0 +1,24 @@
+require 'rails_helper'
+
+RSpec.describe FeedMovements::History do
+  describe '.call' do
+    it "returns the history of feed movements for a given feed" do
+      feed = create(:feed)
+      other_feed = create(:feed)
+      entry_movement = create(:feed_movement, :entry, feed:, quantity: 50, value: 200, occurred_on: Date.current - 1.day)
+      exit_movement = create(:feed_movement, :exit, feed:, quantity: 30, reason: "Sold", occurred_on: Date.current)
+      create(:feed_movement, :entry, feed: other_feed, quantity: 20, value: 100, occurred_on: Date.current)
+      result = described_class.call(feed_id: feed.id, page: 1, per_page: 10)
+      expect(result.records).to eq([ exit_movement, entry_movement ])
+    end
+
+    it "raises an error when the feed does not exist" do
+      expect { described_class.call(feed_id: SecureRandom.uuid, page: 1, per_page: 10) }.to raise_error(ActiveRecord::RecordNotFound)
+    end
+
+    it "raises an error when the feed is deleted" do
+      feed = create(:feed, :deleted)
+      expect { described_class.call(feed_id: feed.id, page: 1, per_page: 10) }.to raise_error(ActiveRecord::RecordNotFound)
+    end
+  end
+end

From 546f27f282f07da842b24c123fdd9218a35bb144 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 15:37:38 -0300
Subject: [PATCH 08/12] =?UTF-8?q?feat:=20adiciona=20endpoint=20de=20hist?=
 =?UTF-8?q?=C3=B3rico=20de=20movimenta=C3=A7=C3=B5es=20de=20ra=C3=A7=C3=A3?=
 =?UTF-8?q?o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../api/v1/feed_movements_controller.rb       |  8 +++
 config/routes.rb                              |  1 +
 .../api/v1/feed_movements/index_spec.rb       | 49 +++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 spec/requests/api/v1/feed_movements/index_spec.rb

diff --git a/app/controllers/api/v1/feed_movements_controller.rb b/app/controllers/api/v1/feed_movements_controller.rb
index e8a1bf0..7f0852b 100644
--- a/app/controllers/api/v1/feed_movements_controller.rb
+++ b/app/controllers/api/v1/feed_movements_controller.rb
@@ -23,6 +23,14 @@ def create_exit
         render json: movement, serializer: FeedMovementSerializer, status: :created
       end
 
+      def index
+        result = FeedMovements::History.call(
+          feed_id: params[:feed_id],
+          page: params[:page], per_page: params[:per_page]
+        )
+        render json: PaginatedCollectionSerializer.call(result:, serializer: FeedMovementSerializer)
+      end
+
       private
 
       def entry_params
diff --git a/config/routes.rb b/config/routes.rb
index 63a1418..9838586 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -30,6 +30,7 @@
       resources :feeds, only: [ :create, :index, :show, :update, :destroy ] do
         post "movements/entry", to: "feed_movements#create_entry"
         post "movements/exit", to: "feed_movements#create_exit"
+        get "movements", to: "feed_movements#index"
       end
 
       get "health", to: "health#show"
diff --git a/spec/requests/api/v1/feed_movements/index_spec.rb b/spec/requests/api/v1/feed_movements/index_spec.rb
new file mode 100644
index 0000000..7432595
--- /dev/null
+++ b/spec/requests/api/v1/feed_movements/index_spec.rb
@@ -0,0 +1,49 @@
+require 'rails_helper'
+
+RSpec.describe "GET /api/v1/feeds/:feed_id/movements", type: :request do
+  let (:user) { create(:user) }
+  let (:tokens) { Auth::CreateSession.call(user:) }
+
+  let(:headers) do
+    {
+      "Authorization" => "Bearer #{tokens[:access_token]}"
+    }
+  end
+
+  it "returns a list of feed movements for the given feed" do
+    feed = create(:feed, stock_quantity: 100)
+    create(:feed_movement, feed:, movement_type: "entry", quantity: 50, value: 200, occurred_on: Date.current)
+    create(:feed_movement, feed:, movement_type: "exit", quantity: 30, reason: "Sold", occurred_on: Date.current)
+    get "/api/v1/feeds/#{feed.id}/movements", headers: headers
+    body = response.parsed_body
+    expect(response).to have_http_status(:ok)
+    expect(body['data'].size).to eq(2)
+    expect(body['data'].pluck('movement_type')).to match_array([ "entry", "exit" ])
+  end
+
+  it "returns a paginated list of feed movements" do
+    feed = create(:feed, stock_quantity: 100)
+    create_list(:feed_movement, 3, feed:, movement_type: "entry", quantity: 50, value: 200, occurred_on: Date.current)
+    get "/api/v1/feeds/#{feed.id}/movements", headers: headers, params: { page: 1, per_page: 2 }
+    body = response.parsed_body
+    expect(response).to have_http_status(:ok)
+    expect(body['data'].size).to eq(2)
+    expect(body['meta']).to include(
+      'page' => 1,
+      'per_page' => 2,
+      'total_items' => 3,
+      'total_pages' => 2
+    )
+  end
+
+  it "returns not found when the feed does not exist" do
+    get "/api/v1/feeds/#{SecureRandom.uuid}/movements", headers: headers
+    expect(response).to have_http_status(:not_found)
+  end
+
+  it "returns unauthorized when no token is provided" do
+    feed = create(:feed, stock_quantity: 100)
+    get "/api/v1/feeds/#{feed.id}/movements"
+    expect(response).to have_http_status(:unauthorized)
+  end
+end

From 4d177aa476724de46f767fd09b6930953d2abeb4 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 15:39:23 -0300
Subject: [PATCH 09/12] =?UTF-8?q?chore(i18n):=20adiciona=20tradu=C3=A7?=
 =?UTF-8?q?=C3=B5es=20das=20movimenta=C3=A7=C3=B5es=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 config/locales/en.yml    | 10 ++++++++++
 config/locales/pt-BR.yml | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/config/locales/en.yml b/config/locales/en.yml
index 1785cd8..06a0ce8 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -33,6 +33,9 @@ en:
       feed:
         one: "Feed"
         other: "Feeds"
+      feed_movement:
+        one: "Feed Movement"
+        other: "Feed Movements"
     attributes:
       user:
         name: "Name"
@@ -49,3 +52,10 @@ en:
       feed:
         name: "Name"
         stock_quantity: "Stock Quantity"
+      feed_movement:
+        feed: "Feed"
+        movement_type: "Movement Type"
+        quantity: "Quantity"
+        value: "Value"
+        reason: "Reason"
+        occurred_on: "Occurred On"
diff --git a/config/locales/pt-BR.yml b/config/locales/pt-BR.yml
index 6edff15..c8c9bf3 100644
--- a/config/locales/pt-BR.yml
+++ b/config/locales/pt-BR.yml
@@ -38,6 +38,9 @@ pt-BR:
       feed:
         one: "Ração"
         other: "Rações"
+      feed_movement:
+        one: "Movimentação de Ração"
+        other: "Movimentações de Ração"
     attributes:
       user:
         name: "Nome"
@@ -54,3 +57,10 @@ pt-BR:
       feed:
         name: "Nome"
         stock_quantity: "Quantidade em Estoque"
+      feed_movement:
+        feed: "Ração"
+        movement_type: "Tipo de Movimentação"
+        quantity: "Quantidade"
+        value: "Valor"
+        reason: "Motivo"
+        occurred_on: "Data da Ocorrência"

From 1ae099b3c52f611233165f30d8e5f1c0f82f7e2c Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 16:00:32 -0300
Subject: [PATCH 10/12] =?UTF-8?q?refactor:=20ajusta=20retorno=20do=20hist?=
 =?UTF-8?q?=C3=B3rico=20de=20movimenta=C3=A7=C3=B5es?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/controllers/api/v1/feed_movements_controller.rb |  7 +++++--
 app/serializers/feed_movement_serializer.rb         | 13 ++++++++++++-
 app/serializers/feed_summary_serializer.rb          |  3 +++
 3 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 app/serializers/feed_summary_serializer.rb

diff --git a/app/controllers/api/v1/feed_movements_controller.rb b/app/controllers/api/v1/feed_movements_controller.rb
index 7f0852b..feefd87 100644
--- a/app/controllers/api/v1/feed_movements_controller.rb
+++ b/app/controllers/api/v1/feed_movements_controller.rb
@@ -24,11 +24,14 @@ def create_exit
       end
 
       def index
+        feed = Feed.active.find(params[:feed_id])
         result = FeedMovements::History.call(
-          feed_id: params[:feed_id],
+          feed_id: feed.id,
           page: params[:page], per_page: params[:per_page]
         )
-        render json: PaginatedCollectionSerializer.call(result:, serializer: FeedMovementSerializer)
+
+        paginated = PaginatedCollectionSerializer.call(result:, serializer: FeedMovementSerializer)
+        render json: { feed: FeedSummarySerializer.new(feed).attributes, **paginated }
       end
 
       private
diff --git a/app/serializers/feed_movement_serializer.rb b/app/serializers/feed_movement_serializer.rb
index ac7d74d..20f8628 100644
--- a/app/serializers/feed_movement_serializer.rb
+++ b/app/serializers/feed_movement_serializer.rb
@@ -1,3 +1,14 @@
 class FeedMovementSerializer < ActiveModel::Serializer
-  attributes :id, :feed_id, :movement_type, :quantity, :value, :reason, :occurred_on, :created_at, :updated_at
+  attributes :id, :movement_type, :quantity, :occurred_on, :created_at, :updated_at
+
+  attribute :value, if: :entry?
+  attribute :reason, if: :exit?
+
+  def entry?
+    object.entry?
+  end
+
+  def exit?
+    object.exit?
+  end
 end
diff --git a/app/serializers/feed_summary_serializer.rb b/app/serializers/feed_summary_serializer.rb
new file mode 100644
index 0000000..fd7bb56
--- /dev/null
+++ b/app/serializers/feed_summary_serializer.rb
@@ -0,0 +1,3 @@
+class FeedSummarySerializer < ActiveModel::Serializer
+  attributes :id, :name
+end

From d7fae67e2f6680b5d8b54681d7b1a03448bd8e96 Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 16:16:19 -0300
Subject: [PATCH 11/12] =?UTF-8?q?refactor:=20controla=20exibi=C3=A7=C3=A3o?=
 =?UTF-8?q?=20do=20feed=5Fid=20conforme=20contexto=20da=20movimenta=C3=A7?=
 =?UTF-8?q?=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../api/v1/feed_movements_controller.rb          |  4 ++--
 app/serializers/feed_movement_serializer.rb      | 16 +++++++---------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/app/controllers/api/v1/feed_movements_controller.rb b/app/controllers/api/v1/feed_movements_controller.rb
index feefd87..b3bf65a 100644
--- a/app/controllers/api/v1/feed_movements_controller.rb
+++ b/app/controllers/api/v1/feed_movements_controller.rb
@@ -10,7 +10,7 @@ def create_entry
           value: entry_params[:value],
           occurred_on: entry_params[:occurred_on]
         )
-        render json: movement, serializer: FeedMovementSerializer, status: :created
+        render json: movement, serializer: FeedMovementSerializer, include_feed_id: true, status: :created
       end
 
       def create_exit
@@ -20,7 +20,7 @@ def create_exit
           reason: exit_params[:reason],
           occurred_on: exit_params[:occurred_on]
         )
-        render json: movement, serializer: FeedMovementSerializer, status: :created
+        render json: movement, serializer: FeedMovementSerializer, include_feed_id: true, status: :created
       end
 
       def index
diff --git a/app/serializers/feed_movement_serializer.rb b/app/serializers/feed_movement_serializer.rb
index 20f8628..054e41e 100644
--- a/app/serializers/feed_movement_serializer.rb
+++ b/app/serializers/feed_movement_serializer.rb
@@ -1,14 +1,12 @@
 class FeedMovementSerializer < ActiveModel::Serializer
-  attributes :id, :movement_type, :quantity, :occurred_on, :created_at, :updated_at
-
+  attribute :id
+  attribute :feed_id, if: :include_feed_id?
+  attributes :movement_type, :quantity
   attribute :value, if: :entry?
   attribute :reason, if: :exit?
+  attributes :occurred_on, :created_at, :updated_at
 
-  def entry?
-    object.entry?
-  end
-
-  def exit?
-    object.exit?
-  end
+  def include_feed_id? = instance_options[:include_feed_id]
+  def entry? = object.entry?
+  def exit? = object.exit?
 end

From 45c4256c330bd8a38b32518ac6d89cf995fdeabe Mon Sep 17 00:00:00 2001
From: Felipe Lima <lipezera1836@gmail.com>
Date: Sat, 24 Oct 2026 16:19:14 -0300
Subject: [PATCH 12/12] =?UTF-8?q?refactor:=20adiciona=20stock=5Fquantity?=
 =?UTF-8?q?=20ao=20resumo=20do=20hist=C3=B3rico=20de=20ra=C3=A7=C3=A3o?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/serializers/feed_summary_serializer.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/serializers/feed_summary_serializer.rb b/app/serializers/feed_summary_serializer.rb
index fd7bb56..11f93b9 100644
--- a/app/serializers/feed_summary_serializer.rb
+++ b/app/serializers/feed_summary_serializer.rb
@@ -1,3 +1,3 @@
 class FeedSummarySerializer < ActiveModel::Serializer
-  attributes :id, :name
+  attributes :id, :name, :stock_quantity
 end