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Contents
module ActiveRecord
module Validations
module ClassMethods
# Automatically validates the column against the schema definition
# for nullability, format, and enumerations. Handles integers, floats,
# enumerations, and string limits.
#
# Usage: validates_columns :severity, :name
def validates_columns(*column_names)
begin
cols = columns_hash
column_names.each do |name|
col = cols[name.to_s]
raise ArgumentError, "Cannot find column #{name}" unless col
# test for nullability
validates_presence_of(name) if !col.null
# Test various known types.
case col.type
when :enum
validates_inclusion_of name, :in => col.values, :allow_nil => true
when :integer, :float
validates_numericality_of name, :allow_nil => true
when :string
if col.limit
validates_length_of name, :maximum => col.limit, :allow_nil => true
end
end
end
rescue ActiveRecord::StatementInvalid=>e
raise e unless e.message.include?("42S02") # swallow the exception if its for a missing table
end
end
end
end
end
Version data entries
11 entries across 11 versions & 3 rubygems