rails - Data insertion within migration don't work

Question

I'm trying to insert data with migration and don't understand what's wrong with this code:

def change

  create_table :sourcebuster_settings do |t|
    t.integer :session_length
    t.boolean :use_subdomains, default: false
    t.string :main_host

    t.timestamps
  end
  Sourcebuster::Setting.create session_length: 30,
                               use_subdomains: false
end

create_table works fine, but no data inserted after migration. No errors in console.

Previous migrations with the same method of data insertions works fine also. Problem only with this one.

Answer 1

I got it. In my setting model:

  before_save { self.main_host = main_host.gsub(/(http:|https:|www\.|:|\/)/,'').downcase if self.main_host }

  validates_presence_of :main_host, if: lambda { self.use_subdomains }
  validates :main_host, format: { with: VALID_HOST_REGEX }, allow_blank: true

Added allow_blank: true to main_host validation.