Module: ActiveRecord::DatabaseValidations::StringTruncator

Extended by:
ActiveSupport::Concern
Defined in:
lib/active_record/validations/string_truncator.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.mysql_textual_column_limit(column) ⇒ Object 



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# File 'lib/active_record/validations/string_truncator.rb', line 37

def self.mysql_textual_column_limit(column)
  @mysql_textual_column_limits ||= {}
  @mysql_textual_column_limits[column] ||= begin
    raise ArgumentError, "Only UTF-8 textual columns are supported." unless column.text? && column.collation =~ /\Autf8_/

    column_type = column.sql_type.sub(/\(.*\z/, '').gsub(/\s/, '_').to_sym
    type_limit  = ActiveRecord::Validations::DatabaseConstraintsValidator::TYPE_LIMITS.fetch(column_type, {})
    column.limit || type_limit[:default_maximum]
  end
end