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# Redmine - project management software
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# Copyright (C) 2006-2012 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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class CustomField < ActiveRecord::Base
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include Redmine::SubclassFactory
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has_many :custom_values, :dependent => :delete_all
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acts_as_list :scope => 'type = \'#{self.class}\''
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serialize :possible_values
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validates_presence_of :name, :field_format
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validates_uniqueness_of :name, :scope => :type
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validates_length_of :name, :maximum => 30
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validates_inclusion_of :field_format, :in => Redmine::CustomFieldFormat.available_formats
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validate :validate_custom_field
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before_validation :set_searchable
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def set_searchable
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# make sure these fields are not searchable
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self.searchable = false if %w(int float date bool).include?(field_format)
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# make sure only these fields can have multiple values
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self.multiple = false unless %w(list user version).include?(field_format)
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true
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end
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def validate_custom_field
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if self.field_format == "list"
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errors.add(:possible_values, :blank) if self.possible_values.nil? || self.possible_values.empty?
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errors.add(:possible_values, :invalid) unless self.possible_values.is_a? Array
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end
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if regexp.present?
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begin
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Regexp.new(regexp)
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rescue
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errors.add(:regexp, :invalid)
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end
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end
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if default_value.present? && !valid_field_value?(default_value)
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errors.add(:default_value, :invalid)
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end
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end
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def possible_values_options(obj=nil)
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case field_format
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when 'user', 'version'
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if obj.respond_to?(:project) && obj.project
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case field_format
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when 'user'
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obj.project.users.sort.collect {|u| [u.to_s, u.id.to_s]}
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when 'version'
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obj.project.shared_versions.sort.collect {|u| [u.to_s, u.id.to_s]}
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end
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elsif obj.is_a?(Array)
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obj.collect {|o| possible_values_options(o)}.reduce(:&)
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else
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[]
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end
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when 'bool'
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[[l(:general_text_Yes), '1'], [l(:general_text_No), '0']]
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else
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possible_values || []
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end
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end
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def possible_values(obj=nil)
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case field_format
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when 'user', 'version'
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possible_values_options(obj).collect(&:last)
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when 'bool'
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['1', '0']
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else
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values = super()
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if values.is_a?(Array)
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values.each do |value|
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value.force_encoding('UTF-8') if value.respond_to?(:force_encoding)
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end
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end
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values || []
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end
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end
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# Makes possible_values accept a multiline string
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def possible_values=(arg)
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if arg.is_a?(Array)
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super(arg.compact.collect(&:strip).select {|v| !v.blank?})
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else
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self.possible_values = arg.to_s.split(/[\n\r]+/)
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end
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end
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def cast_value(value)
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casted = nil
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unless value.blank?
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case field_format
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when 'string', 'text', 'list'
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casted = value
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when 'date'
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casted = begin; value.to_date; rescue; nil end
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when 'bool'
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casted = (value == '1' ? true : false)
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when 'int'
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casted = value.to_i
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when 'float'
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casted = value.to_f
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when 'user', 'version'
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casted = (value.blank? ? nil : field_format.classify.constantize.find_by_id(value.to_i))
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end
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end
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casted
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end
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# Returns a ORDER BY clause that can used to sort customized
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# objects by their value of the custom field.
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# Returns false, if the custom field can not be used for sorting.
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def order_statement
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return nil if multiple?
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case field_format
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when 'string', 'text', 'list', 'date', 'bool'
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# COALESCE is here to make sure that blank and NULL values are sorted equally
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"COALESCE((SELECT cv_sort.value FROM #{CustomValue.table_name} cv_sort" +
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" WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
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" AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
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" AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
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when 'int', 'float'
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# Make the database cast values into numeric
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# Postgresql will raise an error if a value can not be casted!
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# CustomValue validations should ensure that it doesn't occur
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"(SELECT CAST(cv_sort.value AS decimal(60,3)) FROM #{CustomValue.table_name} cv_sort" +
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" WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
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" AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
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" AND cv_sort.custom_field_id=#{id} AND cv_sort.value <> '' AND cv_sort.value IS NOT NULL LIMIT 1)"
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else
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nil
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end
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end
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def <=>(field)
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position <=> field.position
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end
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def self.customized_class
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self.name =~ /^(.+)CustomField$/
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begin; $1.constantize; rescue nil; end
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end
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# to move in project_custom_field
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def self.for_all
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find(:all, :conditions => ["is_for_all=?", true], :order => 'position')
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end
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def type_name
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nil
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end
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# Returns the error messages for the given value
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# or an empty array if value is a valid value for the custom field
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def validate_field_value(value)
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errs = []
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if value.is_a?(Array)
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if !multiple?
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errs << ::I18n.t('activerecord.errors.messages.invalid')
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end
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if is_required? && value.detect(&:present?).nil?
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errs << ::I18n.t('activerecord.errors.messages.blank')
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end
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value.each {|v| errs += validate_field_value_format(v)}
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else
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if is_required? && value.blank?
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errs << ::I18n.t('activerecord.errors.messages.blank')
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end
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errs += validate_field_value_format(value)
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end
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errs
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end
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# Returns true if value is a valid value for the custom field
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def valid_field_value?(value)
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validate_field_value(value).empty?
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end
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protected
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# Returns the error message for the given value regarding its format
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def validate_field_value_format(value)
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errs = []
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if value.present?
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errs << ::I18n.t('activerecord.errors.messages.invalid') unless regexp.blank? or value =~ Regexp.new(regexp)
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errs << ::I18n.t('activerecord.errors.messages.too_short', :count => min_length) if min_length > 0 and value.length < min_length
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errs << ::I18n.t('activerecord.errors.messages.too_long', :count => max_length) if max_length > 0 and value.length > max_length
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# Format specific validations
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case field_format
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when 'int'
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errs << ::I18n.t('activerecord.errors.messages.not_a_number') unless value =~ /^[+-]?\d+$/
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when 'float'
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begin; Kernel.Float(value); rescue; errs << ::I18n.t('activerecord.errors.messages.invalid') end
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when 'date'
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errs << ::I18n.t('activerecord.errors.messages.not_a_date') unless value =~ /^\d{4}-\d{2}-\d{2}$/ && begin; value.to_date; rescue; false end
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when 'list'
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errs << ::I18n.t('activerecord.errors.messages.inclusion') unless possible_values.include?(value)
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end
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end
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errs
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end
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end
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