112 lines
4.3 KiB
Ruby
112 lines
4.3 KiB
Ruby
# redMine - project management software
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# Copyright (C) 2006 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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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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FIELD_FORMATS = { "string" => { :name => :label_string, :order => 1 },
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"text" => { :name => :label_text, :order => 2 },
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"int" => { :name => :label_integer, :order => 3 },
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"float" => { :name => :label_float, :order => 4 },
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"list" => { :name => :label_list, :order => 5 },
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"date" => { :name => :label_date, :order => 6 },
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"bool" => { :name => :label_boolean, :order => 7 }
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}.freeze
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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_format_of :name, :with => /^[\w\s\.\'\-]*$/i
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validates_inclusion_of :field_format, :in => FIELD_FORMATS.keys
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def initialize(attributes = nil)
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super
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self.possible_values ||= []
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end
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def before_validation
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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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true
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end
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def validate
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if self.field_format == "list"
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errors.add(:possible_values, :activerecord_error_blank) if self.possible_values.nil? || self.possible_values.empty?
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errors.add(:possible_values, :activerecord_error_invalid) unless self.possible_values.is_a? Array
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end
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# validate default value
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v = CustomValue.new(:custom_field => self.clone, :value => default_value, :customized => nil)
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v.custom_field.is_required = false
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errors.add(:default_value, :activerecord_error_invalid) unless v.valid?
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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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write_attribute(:possible_values, 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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# 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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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.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.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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end
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