Redmine/app/models/custom_field.rb

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# redMine - project management software
# Copyright (C) 2006 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
FIELD_FORMATS = { "string" => { :name => :label_string, :order => 1 },
"text" => { :name => :label_text, :order => 2 },
"int" => { :name => :label_integer, :order => 3 },
"float" => { :name => :label_float, :order => 4 },
"list" => { :name => :label_list, :order => 5 },
"date" => { :name => :label_date, :order => 6 },
"bool" => { :name => :label_boolean, :order => 7 }
}.freeze
validates_presence_of :name, :field_format
validates_uniqueness_of :name, :scope => :type
validates_length_of :name, :maximum => 30
validates_format_of :name, :with => /^[\w\s\.\'\-]*$/i
validates_inclusion_of :field_format, :in => FIELD_FORMATS.keys
def initialize(attributes = nil)
super
self.possible_values ||= []
end
def before_validation
# remove empty values
self.possible_values = self.possible_values.collect{|v| v unless v.empty?}.compact
# make sure these fields are not searchable
self.searchable = false if %w(int float date bool).include?(field_format)
true
end
def validate
if self.field_format == "list"
errors.add(:possible_values, :activerecord_error_blank) if self.possible_values.nil? || self.possible_values.empty?
errors.add(:possible_values, :activerecord_error_invalid) unless self.possible_values.is_a? Array
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, :activerecord_error_invalid) unless v.valid?
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
def type_name
nil
end
end