PhoenixKit.Migrations.BelowFloorError exception (phoenix_kit v2.0.0)

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Raised when a database's PhoenixKit version is below this release's floor (PhoenixKit.Migrations.Postgres.initial_version/0) — a shape this release's compiled chain no longer carries migration modules for. Spec: dev_docs/plans/2026-07-14-squash-migrations-spec.md §5.2 / §6.4 R3.

Repair is a completeness tool, not a migration bridge (§6.4 R3): non-additive intermediate transforms below the floor (type changes, PK promotions, key rewrites) cannot be replayed additively. The only supported path back to a floor-or-above shape is the migration bridge — the last pre-squash 1.7.x release of PhoenixKit, which still carries every version from V01. An operator on a below-floor install must:

  1. Pin the bridge release ({:phoenix_kit, "~> 1.7"}) and run its mix phoenix_kit.update (or PhoenixKit.Migrations.up/1) until the reported version is at least the floor this release requires.
  2. Only then move the pin to this release and upgrade normally.

Fields

  • :db_version — the version this database is actually at (read from the phoenix_kit table comment)
  • :floor — this release's initial_version/0
  • :bridge_version — the bridge release's version string, when known; nil until that release is tagged (the message falls back to generic "1.7.x bridge release" wording in that case — see dev_docs/plans/2026-07-14-squash-migrations-spec.md §7.2's "last 1.7.x = frozen bridge")
  • :context — which entry point raised: :up, :down, or :ensure_current. The latter is reached only through PhoenixKit.Migration.ensure_current/2 (test/CI boot helper) and appends a hint that installing the bridge is very likely NOT the right advice there — a persistent below-floor CI database is the common case, and mix test.reset is the actual fix.

Summary

Types

context()
t()

Types

context()

@type context() :: :up | :down | :ensure_current

t()

@type t() :: %PhoenixKit.Migrations.BelowFloorError{
  __exception__: true,
  bridge_version: String.t() | nil,
  context: context(),
  db_version: pos_integer(),
  floor: pos_integer()
}