45 lines
1.2 KiB
Elixir
45 lines
1.2 KiB
Elixir
defmodule ComponentsElixir.Inventory.Category do
|
|
@moduledoc """
|
|
Schema for component categories.
|
|
|
|
Categories can be hierarchical with parent-child relationships.
|
|
"""
|
|
use Ecto.Schema
|
|
import Ecto.Changeset
|
|
|
|
alias ComponentsElixir.Inventory.{Category, Component}
|
|
|
|
schema "categories" do
|
|
field :name, :string
|
|
field :description, :string
|
|
|
|
belongs_to :parent, Category
|
|
has_many :children, Category, foreign_key: :parent_id
|
|
has_many :components, Component
|
|
|
|
timestamps()
|
|
end
|
|
|
|
@doc false
|
|
def changeset(category, attrs) do
|
|
category
|
|
|> cast(attrs, [:name, :description, :parent_id])
|
|
|> validate_required([:name])
|
|
|> validate_length(:name, min: 1, max: 255)
|
|
|> validate_length(:description, max: 1000)
|
|
|> unique_constraint([:name, :parent_id])
|
|
|> foreign_key_constraint(:parent_id)
|
|
end
|
|
|
|
@doc """
|
|
Returns the full path of the category including parent names.
|
|
"""
|
|
def full_path(%Category{parent: nil} = category), do: category.name
|
|
def full_path(%Category{parent: %Category{} = parent} = category) do
|
|
"#{full_path(parent)} > #{category.name}"
|
|
end
|
|
def full_path(%Category{parent: %Ecto.Association.NotLoaded{}} = category) do
|
|
category.name
|
|
end
|
|
end
|