Module: SchemaPlus::ForeignKeys::Middleware::Migration::Column

Defined in:
lib/schema_plus/foreign_keys/middleware/migration.rb

Instance Method Summary collapse

Instance Method Details

#around(env) {|env| ... } ⇒ Object

Add the foreign keys

Yields:

  • (env) 


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# File 'lib/schema_plus/foreign_keys/middleware/migration.rb', line 70

def around(env)
  original_options = env.options
  env.options = original_options.dup

  is_reference = (env.type == :reference)
  is_polymorphic = is_reference && env.options[:polymorphic]

  # usurp foreign key creation from AR, since it doesn't support
  # all our features
  env.options[:foreign_key] = false 

  yield env

  return if is_polymorphic or env.implements_reference

  env.options = original_options

  add_foreign_keys(env)

end

#before(env) ⇒ Object

Column option shortcuts



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# File 'lib/schema_plus/foreign_keys/middleware/migration.rb', line 38

def before(env)
  opts = env.options[:foreign_key]

  return if opts == false

  opts = {} if opts == true

  [:references, :on_update, :on_delete, :deferrable].each do |key|
    (opts||={}).reverse_merge!(key => env.options[key]) if env.options.has_key? key
  end

  return if opts.nil?

  if opts.has_key?(:references) && !opts[:references]
    env.options[:foreign_key] = false
    return
  end

  case opts[:references]
  when nil
  when Array
    table, primary_key = opts[:references]
    opts[:references] = table
    opts[:primary_key] ||= primary_key
  end

  env.options[:foreign_key] = opts
end