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# Redmine - project management software
# Copyright (C) 2006-2011 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
class CustomField < ActiveRecord::Base
has_many :custom_values, :dependent => :delete_all
acts_as_list :scope => 'type = \'#{self.class}\''
serialize :possible_values
validates_presence_of :name, :field_format
validates_uniqueness_of :name, :scope => :type
validates_length_of :name, :maximum => 30
validates_inclusion_of :field_format, :in => Redmine::CustomFieldFormat.available_formats
validate :validate_values
def initialize(attributes = nil)
super
self.possible_values ||= []
end
def before_validation
# make sure these fields are not searchable
self.searchable = false if %w(int float date bool).include?(field_format)
true
end
def validate_values
if self.field_format == "list"
errors.add(:possible_values, :blank) if self.possible_values.nil? || self.possible_values.empty?
errors.add(:possible_values, :invalid) unless self.possible_values.is_a? Array
end
if regexp.present?
begin
Regexp.new(regexp)
rescue
errors.add(:regexp, :invalid)
end
end
# validate default value
v = CustomValue.new(:custom_field => self.clone, :value => default_value, :customized => nil)
v.custom_field.is_required = false
errors.add(:default_value, :invalid) unless v.valid?
end
def possible_values_options(obj=nil)
case field_format
when 'user', 'version'
if obj.respond_to?(:project) && obj.project
case field_format
when 'user'
obj.project.users.sort.collect {|u| [u.to_s, u.id.to_s]}
when 'version'
obj.project.shared_versions.sort.collect {|u| [u.to_s, u.id.to_s]}
end
elsif obj.is_a?(Array)
obj.collect {|o| possible_values_options(o)}.inject {|memo, v| memo & v}
else
[]
end
else
read_attribute :possible_values
end
end
def possible_values(obj=nil)
case field_format
when 'user', 'version'
possible_values_options(obj).collect(&:last)
else
read_attribute :possible_values
end
end
# Makes possible_values accept a multiline string
def possible_values=(arg)
if arg.is_a?(Array)
write_attribute(:possible_values, arg.compact.collect(&:strip).select {|v| !v.blank?})
else
self.possible_values = arg.to_s.split(/[\n\r]+/)
end
end
def cast_value(value)
casted = nil
unless value.blank?
case field_format
when 'string', 'text', 'list'
casted = value
when 'date'
casted = begin; value.to_date; rescue; nil end
when 'bool'
casted = (value == '1' ? true : false)
when 'int'
casted = value.to_i
when 'float'
casted = value.to_f
when 'user', 'version'
casted = (value.blank? ? nil : field_format.classify.constantize.find_by_id(value.to_i))
end
end
casted
end
# Returns a ORDER BY clause that can used to sort customized
# objects by their value of the custom field.
# Returns false, if the custom field can not be used for sorting.
def order_statement
case field_format
when 'string', 'text', 'list', 'date', 'bool'
# COALESCE is here to make sure that blank and NULL values are sorted equally
"COALESCE((SELECT cv_sort.value FROM #{CustomValue.table_name} cv_sort" +
" WHERE cv_sort.customized_type='#{self.class.customized_class.name}'" +
" AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
" AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
when 'int', 'float'
# Make the database cast values into numeric
# Postgresql will raise an error if a value can not be casted!
# CustomValue validations should ensure that it doesn't occur
"(SELECT CAST(cv_sort.value AS decimal(60,3)) FROM #{CustomValue.table_name} cv_sort" +
" WHERE cv_sort.customized_type='#{self.class.customized_class.name}'" +
" AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
" AND cv_sort.custom_field_id=#{id} AND cv_sort.value <> '' AND cv_sort.value IS NOT NULL LIMIT 1)"
else
nil
end
end
def <=>(field)
position <=> field.position
end
def self.customized_class
self.name =~ /^(.+)CustomField$/
begin; $1.constantize; rescue nil; end
end
# to move in project_custom_field
def self.for_all
find(:all, :conditions => ["is_for_all=?", true], :order => 'position')
end
# Returns an instance of the given subclass name
def self.new_subclass_instance(class_name, *args)
klass = nil
begin
klass = class_name.to_s.classify.constantize
rescue
# invalid class name
end
unless subclasses.include? klass
klass = nil
end
if klass
klass.new(*args)
end
end
def type_name
nil
end
end
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