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defmodule DaProductApp.TransactionEventChain do |
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@moduledoc """ |
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Ecto schema for the transaction event chain. Each row references an event in |
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a source table (qr_validations, transaction_events, followup_requests, etc.) |
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and links to the previous event for the same transaction, enabling traversal. |
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""" |
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use Ecto.Schema |
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import Ecto.Changeset |
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schema "transaction_event_chain" do |
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field :transaction_id, :integer |
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field :event_type, :string |
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field :event_ref_table, :string |
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field :event_ref_id, :integer |
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field :prev_event_id, :integer |
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field :payload, :string |
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timestamps() |
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end |
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@required ~w(transaction_id event_type event_ref_table)a |
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def changeset(struct, attrs) do |
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struct |
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|> cast(attrs, [:transaction_id, :event_type, :event_ref_table, :event_ref_id, :prev_event_id, :payload]) |
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|> validate_required(@required) |
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end |
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end |