Basic Usage

Just make yml file.
If you register data to following prefecture data.

prefecture table

Field	Type	NULL
id	bigint(20)	NO
name	varchar(255)	YES
created_at	datetime	NO
updated_at	datetime	NO

prefecture model

Model
Pref

First, Please make following yml file your favorite directory of rails project.
The file name can be anything.
In my case, made yml file in db directory and named file pref_data.

Default:
  Pref:
    loop: 3

and write following ruby code in seeds.rb.

Pokotarou.make("./db/pref_data.yml")

or 

Pokotarou::V2.new("./db/pref_data.yml").make

and execute following command

$ rails db:seed

prefecture data is registerd your db. Let's check with the following code.

# You have to get 3
Pref.count => 3