Convertx (convertx v0.1.0)

This module helps in convert nested struct into map.

Demo

defmodule Shop do
 use Ecto.Schema

 @primary_key {:shop_id, :id, autogenerate: true}
 schema "shop" do
   field(:name, :string)
 end
end

defmodule Order do
 use Ecto.Schema

 @primary_key {:order_id, :id, autogenerate: true}
 schema "order" do
   field(:code, :string)
   field(:total_price, :decimal)
   field(:delivery_date, :utc_datetime)
   field(:metadata, :map)

   has_many :items, Item, foreign_key: :order_id
   belongs_to(:shop, Shop, references: :shop_id)
 end
end

defmodule Item do
 use Ecto.Schema

 @primary_key {:item_id, :id, autogenerate: true}
 schema "item" do
   field(:name, :string)
   field(:price, :decimal)
   field(:quantity, :integer)

   belongs_to(:order, Order, references: :order_id)
 end
end

Link to this section Summary

Functions

map_from_struct(schema)

Converts a nested struct to map.

Link to this section Functions

map_from_struct(schema)

Specs

map_from_struct(struct()) :: map()

Converts a nested struct to map.

Examples

order = %Order
{
  order_id: 1,
  code: "CODE1",
  total_price: Decimal.new(100),
  delivery_date: DateTime.utc_now,
  metadata: %{guest_name: "Hoang Nguyen", is_member: true},
  items: [
    %Item{item_id: 1, name: "Doraemon", price: Decimal.new(20), quantity: 2, order_id: 1},
    %Item{item_id: 2, name: "One Piece", price: Decimal.new(15), quantity: 6, order_id: 1}
  ]
}
#=>
%Order{
  __meta__: #Ecto.Schema.Metadata<:built, "order">,
  code: "CODE1",
  delivery_date: ~U[2021-06-07 09:46:26.549287Z],
  items: [
    %Item{
      __meta__: #Ecto.Schema.Metadata<:built, "item">,
      item_id: nil,
      name: "Doraemon",
      order: #Ecto.Association.NotLoaded<association :order is not loaded>,
      order_id: 1,
      price: #Decimal<20>,
      quantity: 2
    },
    %Item{
      __meta__: #Ecto.Schema.Metadata<:built, "item">,
      item_id: nil,
      name: "One Piece",
      order: #Ecto.Association.NotLoaded<association :order is not loaded>,
      order_id: 1,
      price: #Decimal<15>,
      quantity: 4
    }
  ],
  metadata: %{guest_name: "Hoang Nguyen", is_member: true},
  order_id: 1,
  shop: #Ecto.Association.NotLoaded<association :shop is not loaded>,
  shop_id: nil,
  total_price: #Decimal<100>
}

Convertx.map_from_struct(order)
#=>
%{
  code: "CODE1",
  delivery_date: ~U[2021-06-07 09:46:26.549287Z],
  items: [
    %{
      item_id: 1,
      name: "Doraemon",
      order_id: 1,
      price: #Decimal<20>,
      quantity: 2
    },
    %{
      item_id: 2,
      name: "One Piece",
      order_id: 1,
      price: #Decimal<15>,
      quantity: 4
    }
  ],
  metadata: %{guest_name: "Hoang Nguyen", is_member: true},
  order_id: 1,
  shop_id: nil,
  total_price: #Decimal<100>
}