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Contents
module Sequel
class Model
# Errors represents validation errors, a simple hash subclass
# with a few convenience methods.
class Errors < ::Hash
ATTRIBUTE_JOINER = ' and '.freeze
# Assign an array of messages for each attribute on access.
# Using this message is discouraged in new code, use +add+
# to add new error messages, and +on+ to check existing
# error messages.
def [](k)
has_key?(k) ? super : (self[k] = [])
end
# Adds an error for the given attribute.
#
# errors.add(:name, 'is not valid') if name == 'invalid'
def add(att, msg)
self[att] << msg
end
# Return the total number of error messages.
#
# errors.count # => 3
def count
values.inject(0){|m, v| m + v.length}
end
# Return true if there are no error messages, false otherwise.
def empty?
count == 0
end
# Returns an array of fully-formatted error messages.
#
# errors.full_messages
# # => ['name is not valid',
# # 'hometown is not at least 2 letters']
def full_messages
inject([]) do |m, kv|
att, errors = *kv
errors.each {|e| m << "#{Array(att).join(ATTRIBUTE_JOINER)} #{e}"}
m
end
end
# Returns the array of errors for the given attribute, or nil
# if there are no errors for the attribute.
#
# errors.on(:name) # => ['name is not valid']
# errors.on(:id) # => nil
def on(att)
if v = fetch(att, nil) and !v.empty?
v
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems