Graham McIntire
bbe5bde145
Phoenix 1.8 app that scrapes ammunition retailers (Lucky Gunner, SGAmmo) for price data and displays historical price trends. - Data model: retailers, calibers, products, price snapshots - Scraper infrastructure with Req, Floki, realistic browser headers - Oban-scheduled scrape jobs (every 4h with randomized delays) - LiveView pages: homepage with category cards, caliber detail with price table, Chart.js price history, and price stats banner - 18 seeded calibers across handgun/rifle/rimfire/shotgun categories - 77 tests
52 lines
1.4 KiB
Elixir
52 lines
1.4 KiB
Elixir
defmodule Ammoprices.Catalog.Product do
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@moduledoc false
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use Ecto.Schema
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import Ecto.Changeset
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@primary_key {:id, :binary_id, autogenerate: true}
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@foreign_key_type :binary_id
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schema "products" do
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belongs_to :retailer, Ammoprices.Catalog.Retailer
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belongs_to :caliber, Ammoprices.Catalog.Caliber
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field :title, :string
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field :url, :string
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field :brand, :string
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field :grain_weight, :integer
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field :round_count, :integer
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field :casing, :string
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field :condition, :string, default: "new"
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field :upc, :string
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field :external_id, :string
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field :in_stock, :boolean, default: true
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field :last_seen_at, :utc_datetime
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has_many :price_snapshots, Ammoprices.Prices.PriceSnapshot
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timestamps(type: :utc_datetime)
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end
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def changeset(product, attrs) do
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product
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|> cast(attrs, [
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:title,
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:url,
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:brand,
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:grain_weight,
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:round_count,
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:casing,
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:condition,
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:upc,
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:external_id,
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:in_stock,
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:last_seen_at
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])
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|> validate_required([:title, :url])
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|> validate_inclusion(:casing, ~w(brass steel aluminum alloy composite))
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|> validate_inclusion(:condition, ~w(new remanufactured surplus))
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|> validate_number(:grain_weight, greater_than: 0)
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|> validate_number(:round_count, greater_than: 0)
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|> unique_constraint([:retailer_id, :url])
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end
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end
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