Create budget categories

Author: dmitry-sidorov

lib/budget_tracker/budget_categories.ex

@@ -0,0 +1,104 @@
+defmodule BudgetTracker.BudgetCategories do
+  @moduledoc """
+  The BudgetCategories context.
+  """
+
+  import Ecto.Query, warn: false
+  alias BudgetTracker.Repo
+
+  alias BudgetTracker.BudgetCategories.BudgetCategory
+
+  @doc """
+  Returns the list of budget_categories.
+
+  ## Examples
+
+      iex> list_budget_categories()
+      [%BudgetCategory{}, ...]
+
+  """
+  def list_budget_categories do
+    Repo.all(BudgetCategory)
+  end
+
+  @doc """
+  Gets a single budget_category.
+
+  Raises `Ecto.NoResultsError` if the Budget category does not exist.
+
+  ## Examples
+
+      iex> get_budget_category!(123)
+      %BudgetCategory{}
+
+      iex> get_budget_category!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_budget_category!(id), do: Repo.get!(BudgetCategory, id)
+
+  @doc """
+  Creates a budget_category.
+
+  ## Examples
+
+      iex> create_budget_category(%{field: value})
+      {:ok, %BudgetCategory{}}
+
+      iex> create_budget_category(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_budget_category(attrs \\ %{}) do
+    %BudgetCategory{}
+    |> BudgetCategory.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a budget_category.
+
+  ## Examples
+
+      iex> update_budget_category(budget_category, %{field: new_value})
+      {:ok, %BudgetCategory{}}
+
+      iex> update_budget_category(budget_category, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_budget_category(%BudgetCategory{} = budget_category, attrs) do
+    budget_category
+    |> BudgetCategory.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a budget_category.
+
+  ## Examples
+
+      iex> delete_budget_category(budget_category)
+      {:ok, %BudgetCategory{}}
+
+      iex> delete_budget_category(budget_category)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_budget_category(%BudgetCategory{} = budget_category) do
+    Repo.delete(budget_category)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking budget_category changes.
+
+  ## Examples
+
+      iex> change_budget_category(budget_category)
+      %Ecto.Changeset{data: %BudgetCategory{}}
+
+  """
+  def change_budget_category(%BudgetCategory{} = budget_category, attrs \\ %{}) do
+    BudgetCategory.changeset(budget_category, attrs)
+  end
+end

lib/budget_tracker/budget_categories/budget_category.ex

@@ -0,0 +1,28 @@
+defmodule BudgetTracker.BudgetCategories.BudgetCategory do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  alias BudgetTracker.{
+    BudgetPlans.BudgetPlan,
+    Currencies.Currency,
+    OperationCategories.OperationCategory
+  }
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "budget_categories" do
+    field :limit, :float
+    belongs_to :budget_plan, BudgetPlan
+    belongs_to :operation_category, OperationCategory
+    belongs_to :currency, Currency
+
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(budget_category, attrs) do
+    budget_category
+    |> cast(attrs, [:limit])
+    |> validate_required([:limit])
+  end
+end

lib/budget_tracker/budget_plans/budget_plan.ex

@@ -1,15 +1,17 @@
 defmodule BudgetTracker.BudgetPlans.BudgetPlan do
-  alias BudgetTracker.Accounts.User
   use Ecto.Schema
   import Ecto.Changeset
 
+  alias BudgetTracker.{Accounts.User, BudgetCategories.BudgetCategory}
+
   @primary_key {:id, :binary_id, autogenerate: true}
   @foreign_key_type :binary_id
   schema "budget_plans" do
     field :description, :string
     field :started_form, :naive_datetime
     field :duration_in_days, :integer
     belongs_to :users, User
+    has_many :budget_categories, BudgetCategory
 
     timestamps(type: :utc_datetime)
   end

lib/budget_tracker/operation_categories/operation_category.ex

@@ -4,14 +4,15 @@ defmodule BudgetTracker.OperationCategories.OperationCategory do
   """
   use Ecto.Schema
   import Ecto.Changeset
-  alias BudgetTracker.Operations.Operation
+  alias BudgetTracker.{Operations.Operation, BudgetCategories.BudgetCategory}
 
   @primary_key {:id, :binary_id, autogenerate: true}
   @foreign_key_type :binary_id
   schema "operation_categories" do
     field :title, :string
     field :purpose, Ecto.Enum, values: [:primary, :secondary, :not_mandatory]
     has_many :operations, Operation
+    has_many :budget_categories, BudgetCategory
 
     timestamps(type: :utc_datetime)
   end

priv/repo/migrations/20250122075607_create_budget_categories.exs

@@ -0,0 +1,19 @@
+defmodule BudgetTracker.Repo.Migrations.CreateBudgetCategories do
+  use Ecto.Migration
+
+  def change do
+    create table(:budget_categories, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :limit, :float
+      add :budget_plan_id, references(:budget_plans, on_delete: :nothing, type: :binary_id)
+      add :category_id, references(:operation_categories, on_delete: :nothing, type: :binary_id)
+      add :currency, references(:currencies, on_delete: :nothing, type: :binary_id)
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create index(:budget_categories, [:budget_plan_id])
+    create index(:budget_categories, [:category_id])
+    create index(:budget_categories, [:currency])
+  end
+end

test/budget_tracker/budget_categories_test.exs

@@ -0,0 +1,59 @@
+defmodule BudgetTracker.BudgetCategoriesTest do
+  use BudgetTracker.DataCase
+
+  alias BudgetTracker.BudgetCategories
+
+  describe "budget_categories" do
+    alias BudgetTracker.BudgetCategories.BudgetCategory
+
+    import BudgetTracker.BudgetCategoriesFixtures
+
+    @invalid_attrs %{limit: nil}
+
+    test "list_budget_categories/0 returns all budget_categories" do
+      budget_category = budget_category_fixture()
+      assert BudgetCategories.list_budget_categories() == [budget_category]
+    end
+
+    test "get_budget_category!/1 returns the budget_category with given id" do
+      budget_category = budget_category_fixture()
+      assert BudgetCategories.get_budget_category!(budget_category.id) == budget_category
+    end
+
+    test "create_budget_category/1 with valid data creates a budget_category" do
+      valid_attrs = %{limit: 120.5}
+
+      assert {:ok, %BudgetCategory{} = budget_category} = BudgetCategories.create_budget_category(valid_attrs)
+      assert budget_category.limit == 120.5
+    end
+
+    test "create_budget_category/1 with invalid data returns error changeset" do
+      assert {:error, %Ecto.Changeset{}} = BudgetCategories.create_budget_category(@invalid_attrs)
+    end
+
+    test "update_budget_category/2 with valid data updates the budget_category" do
+      budget_category = budget_category_fixture()
+      update_attrs = %{limit: 456.7}
+
+      assert {:ok, %BudgetCategory{} = budget_category} = BudgetCategories.update_budget_category(budget_category, update_attrs)
+      assert budget_category.limit == 456.7
+    end
+
+    test "update_budget_category/2 with invalid data returns error changeset" do
+      budget_category = budget_category_fixture()
+      assert {:error, %Ecto.Changeset{}} = BudgetCategories.update_budget_category(budget_category, @invalid_attrs)
+      assert budget_category == BudgetCategories.get_budget_category!(budget_category.id)
+    end
+
+    test "delete_budget_category/1 deletes the budget_category" do
+      budget_category = budget_category_fixture()
+      assert {:ok, %BudgetCategory{}} = BudgetCategories.delete_budget_category(budget_category)
+      assert_raise Ecto.NoResultsError, fn -> BudgetCategories.get_budget_category!(budget_category.id) end
+    end
+
+    test "change_budget_category/1 returns a budget_category changeset" do
+      budget_category = budget_category_fixture()
+      assert %Ecto.Changeset{} = BudgetCategories.change_budget_category(budget_category)
+    end
+  end
+end

test/support/fixtures/budget_categories_fixtures.ex

@@ -0,0 +1,20 @@
+defmodule BudgetTracker.BudgetCategoriesFixtures do
+  @moduledoc """
+  This module defines test helpers for creating
+  entities via the `BudgetTracker.BudgetCategories` context.
+  """
+
+  @doc """
+  Generate a budget_category.
+  """
+  def budget_category_fixture(attrs \\ %{}) do
+    {:ok, budget_category} =
+      attrs
+      |> Enum.into(%{
+        limit: 120.5
+      })
+      |> BudgetTracker.BudgetCategories.create_budget_category()
+
+    budget_category
+  end
+end