Module: DrNicMagicModels::Validations

Included in:
ActiveRecord::Base
Defined in:
lib/dr_nic_magic_models/validations.rb

Instance Method Summary collapse

Instance Method Details

#generate_validations ⇒ Object 



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# File 'lib/dr_nic_magic_models/validations.rb', line 4

def generate_validations

  logger = DrNicMagicModels::Logger

  # Ensure that the connection to db is established, else validations don't get created.
  ActiveRecord::Base.connection
  
  # Code reworked from http://www.redhillconsulting.com.au/rails_plugins.html
  # Thanks Red Hill Consulting for using an MIT licence :o)

  # NOT NULL constraints
  self.columns.reject { |column| column.name =~ /(?i)^(((created|updated)_(at|on))|position|type|id)$/ }.each do |column|
    
    if column.type == :integer   
      logger.debug "validates_numericality_of #{column.name}, :allow_nil => #{column.null.inspect}, :only_integer => true"       
      self.validates_numericality_of column.name, :allow_nil => column.null, :only_integer => true
    elsif column.number?
      logger.debug "validates_numericality_of #{column.name}, :allow_nil => #{column.null.inspect}"
      self.validates_numericality_of column.name, :allow_nil => column.null
    elsif column.text? && column.limit
      logger.debug "validates_length_of #{column.name}, :allow_nil => #{column.null.inspect}, :maximum => #{column.limit}"
      self.validates_length_of column.name, :allow_nil => column.null, :maximum => column.limit
    end
    
    # Active record seems to interpolate booleans anyway to either true, false or nil...
    if column.type == :boolean
      logger.debug "validates_inclusion_of #{column.name}, :in => [true, false], :allow_nil => #{column.null}, :message => ActiveRecord::Errors.default_error_messages[:blank]"
      self.validates_inclusion_of column.name, :in => [true, false], :allow_nil => column.null, :message => ActiveRecord::Errors.default_error_messages[:blank]
    elsif !column.null
      logger.debug "validates_presence_of #{column.name}"
      self.validates_presence_of column.name
    end
  end
  
  # Single-column UNIQUE indexes
  get_unique_index_columns.each do |col|
    logger.debug "validates_uniqueness_of #{col}"
    self.validates_uniqueness_of col
  end                  

end