41 lines
1.3 KiB
Elixir
41 lines
1.3 KiB
Elixir
defmodule Mixer.Metrics.PostEvent do
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@moduledoc """
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Ecto schema that maps to the `post_events` table in ClickHouse.
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Each row represents a single analytics event tied to a tweet (post).
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The table uses a MergeTree engine ordered by `(occurred_at, event_type,
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tweet_id)` for efficient time-range scans and per-tweet aggregations.
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## Event types
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| event_type | Description |
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|-------------|------------------------------------------|
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| `"view"` | A tweet was displayed to a user |
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| `"like"` | A user liked a tweet |
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| `"unlike"` | A user removed their like from a tweet |
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| `"comment"` | A user replied to a tweet |
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| `"share"` | A user shared / reposted a tweet |
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"""
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use Ecto.Schema
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@primary_key false
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schema "post_events" do
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# LowCardinality(String) in ClickHouse — keep values in the set above
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field :event_type, :string
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# The tweet that the event relates to
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field :tweet_id, Ecto.UUID
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# The acting user; may be nil for anonymous views
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field :user_id, Ecto.UUID
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# Wall-clock time of the event (UTC, second precision)
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field :occurred_at, :utc_datetime
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# Optional originating IP, useful for deduplicating anonymous views
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field :ip_address, :string
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end
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end
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