method

migration_template

v6.1.3.1 - Show latest stable - 0 notes - Class: Rails::Generators::Migration

migration_template(source, destination, config = {}) public

Creates a migration template at the given destination. The difference to the default template method is that the migration version is appended to the destination file name.

The migration version, migration file name, migration class name are available as instance variables in the template to be rendered.

migration_template "migration.rb", "db/migrate/add_foo_to_bar.rb"

Show source

# File railties/lib/rails/generators/migration.rb, line 56
      def migration_template(source, destination, config = {})
        source = File.expand_path(find_in_source_paths(source.to_s))

        set_migration_assigns!(destination)
        context = instance_eval("binding")

        dir, base = File.split(destination)
        numbered_destination = File.join(dir, ["%migration_number%", base].join("_"))

        file = create_migration numbered_destination, nil, config do
          if ERB.instance_method(:initialize).parameters.assoc(:key) # Ruby 2.6+
            ERB.new(::File.binread(source), trim_mode: "-", eoutvar: "@output_buffer").result(context)
          else
            ERB.new(::File.binread(source), nil, "-", "@output_buffer").result(context)
          end
        end
        Rails::Generators.add_generated_file(file)
      end

migration_template

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