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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
lib/phoenix_kit/migrations/postgres/v06.ex
defmodule PhoenixKit.Migrations.Postgres.V06 do
@moduledoc """
PhoenixKit V06 Migration: Allow NULL Expiration Dates for Referral Codes
This migration allows referral codes to have no expiration date by making
the expiration_date field nullable. This enables the creation of permanent
referral codes that never expire.
## Changes
### Referral Codes Enhancement
- Modifies expiration_date column to allow NULL values
- Enables creation of permanent referral codes
- Maintains backward compatibility with existing dated codes
- Supports "never expires" functionality
## PostgreSQL Support
- Supports PostgreSQL prefix for schema isolation
- Safe column modification with rollback support
"""
use Ecto.Migration
@doc """
Run the V06 migration to allow NULL expiration dates.
"""
def up(%{prefix: prefix} = _opts) do
# Modify expiration_date column to allow NULL values
alter table(:phoenix_kit_referral_codes, prefix: prefix) do
modify :expiration_date, :utc_datetime_usec, null: true
end
# Set version comment on phoenix_kit table for version tracking
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '6'"
end
# Helper function to build table name with prefix
defp prefix_table_name(table_name, nil), do: table_name
defp prefix_table_name(table_name, prefix), do: "#{prefix}.#{table_name}"
def down(%{prefix: prefix} = _opts) do
# Note: Rolling back this migration requires setting all NULL expiration_date
# values to some default date before making the column NOT NULL again.
# We'll set them to a far future date to maintain functionality.
# Update any NULL expiration dates to a default future date
execute """
UPDATE #{prefix_table_name("phoenix_kit_referral_codes", prefix)}
SET expiration_date = '2099-12-31 23:59:59'::timestamp
WHERE expiration_date IS NULL
"""
# Modify expiration_date column back to NOT NULL
alter table(:phoenix_kit_referral_codes, prefix: prefix) do
modify :expiration_date, :utc_datetime_usec, null: false
end
# Set version comment back to V05
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '5'"
end
end