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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/v11.ex
defmodule PhoenixKit.Migrations.Postgres.V11 do
@moduledoc """
PhoenixKit V11 Migration: Per-User Timezone Settings
This migration adds individual timezone preferences for each user, separate from
the global system timezone setting. This allows personalized date/time formatting
in admin interfaces and user experiences.
## Changes
### User Timezone Column
- Adds user_timezone column to phoenix_kit_users table
- Stores timezone offset as string (e.g., "-5", "0", "+8")
- Nullable field with fallback to system timezone setting
- Validates timezone range (-12 to +12)
### New Features
- **Personal Timezone Preferences**: Each user can set their own timezone
- **Admin Dashboard Enhancement**: Dates formatted per user's timezone
- **Fallback System**: User timezone → System timezone → UTC
- **Backward Compatible**: Existing users default to system timezone
- **Settings Integration**: Seamless integration with existing settings UI
## PostgreSQL Support
- Supports PostgreSQL prefix for schema isolation
- Uses string type for timezone offset storage (consistent with global setting)
- No additional indexes needed (lightweight personal preference)
- Safe nullable field addition (no data migration required)
"""
use Ecto.Migration
@doc """
Run the V11 migration to add per-user timezone settings.
"""
def up(%{prefix: prefix} = _opts) do
# Add user_timezone column to existing phoenix_kit_users table
alter table(:phoenix_kit_users, prefix: prefix) do
# Personal timezone offset (stored as string like global setting)
# Examples: "-12", "-5", "0", "+8", "+12"
# Null means fallback to system timezone setting
add :user_timezone, :string, size: 3, null: true
end
# Set version comment on phoenix_kit table for version tracking
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '11'"
end
@doc """
Rollback the V11 migration.
"""
def down(%{prefix: prefix} = _opts) do
# Remove user_timezone column from users table
alter table(:phoenix_kit_users, prefix: prefix) do
remove :user_timezone
end
# Update version comment on phoenix_kit table
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '10'"
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}"
end