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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/v25.ex
defmodule PhoenixKit.Migrations.Postgres.V25 do
@moduledoc """
PhoenixKit V25 Migration: Aspect Ratio Control for Dimensions
This migration adds support for aspect ratio preservation in dimension configuration.
Allows users to choose between maintaining aspect ratio (width only) or fixed dimensions.
## Changes
### Storage Dimensions Table (phoenix_kit_storage_dimensions)
- Adds `maintain_aspect_ratio` boolean column (default: true)
- When true: Only width is used, height is calculated to preserve aspect ratio
- When false: Both width and height are used as fixed dimensions (for thumbnails/crops)
## Features
- **Aspect Ratio Mode**: Responsive sizing with width-only specification
- **Fixed Dimension Mode**: Exact pixel dimensions for square crops/thumbnails
- **Per-Dimension Control**: Each variant can independently choose its mode
- **Default to Aspect Ratio**: All dimensions default to maintaining aspect ratio
"""
use Ecto.Migration
@doc """
Run the V25 migration to add aspect ratio control.
"""
def up(%{prefix: prefix} = _opts) do
# Add maintain_aspect_ratio column to dimensions table
alter table(:phoenix_kit_storage_dimensions, prefix: prefix) do
add :maintain_aspect_ratio, :boolean, default: true, null: false
end
# Set version comment on phoenix_kit table for version tracking
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '25'"
end
@doc """
Rollback the V25 migration.
"""
def down(%{prefix: prefix} = _opts) do
# Remove maintain_aspect_ratio column from dimensions table
alter table(:phoenix_kit_storage_dimensions, prefix: prefix) do
remove :maintain_aspect_ratio
end
# Update version comment on phoenix_kit table to previous version
execute "COMMENT ON TABLE #{prefix_table_name("phoenix_kit", prefix)} IS '24'"
end
# Helper functions
defp prefix_table_name(table_name, nil), do: table_name
defp prefix_table_name(table_name, prefix), do: "#{prefix}.#{table_name}"
end