Class: Charming::Generators::MigrationGenerator

Inherits:
AppFileGenerator show all
Defined in:
lib/charming/generators/migration_generator.rb

Overview

MigrationGenerator implements ‘charming generate migration NAME [field:type …]`. Follows Rails naming conventions:

  • ‘create_<table>` generates a create_table migration (fields become columns)

  • ‘add_<x>to<table>` generates add_column lines for the supplied fields

  • ‘remove_<x>from<table>` generates remove_column lines

  • anything else generates an empty ‘change` method to fill in

Defined Under Namespace

Classes: Field

Constant Summary collapse

VALID_TYPES =

The set of ActiveRecord column types accepted on the command line.

ModelGenerator::VALID_TYPES

Instance Method Summary collapse

Constructor Details

#initialize(name, args, out:, destination:, force: false) ⇒ MigrationGenerator

Returns a new instance of MigrationGenerator.



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# File 'lib/charming/generators/migration_generator.rb', line 18

def initialize(name, args, out:, destination:, force: false)
  super
  @fields = args.map { |arg| parse_field(arg) }
end

Instance Method Details

#generate ⇒ Object

Validates database support, then writes the timestamped migration file.

Raises:



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# File 'lib/charming/generators/migration_generator.rb', line 24

def generate
  raise Error, "Database support is not configured. Run `charming db:install sqlite3` first." unless database_configured?

  create_file(migration_path, migration)
end