Redmine/app/models/custom_field.rb

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# Redmine - project management software
# Copyright (C) 2006-2013 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
include Redmine::SubclassFactory
has_many :custom_values, :dependent => :delete_all
has_and_belongs_to_many :roles, :join_table => "#{table_name_prefix}custom_fields_roles#{table_name_suffix}", :foreign_key => "custom_field_id"
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 => Proc.new { Redmine::CustomFieldFormat.available_formats }
validate :validate_custom_field
before_validation :set_searchable
after_save :handle_multiplicity_change
after_save do |field|
if field.visible_changed? && field.visible
field.roles.clear
end
end
scope :sorted, lambda { order("#{table_name}.position ASC") }
scope :visible, lambda {|*args|
user = args.shift || User.current
if user.admin?
# nop
elsif user.memberships.any?
where("#{table_name}.visible = ? OR #{table_name}.id IN (SELECT DISTINCT cfr.custom_field_id FROM #{Member.table_name} m" +
" INNER JOIN #{MemberRole.table_name} mr ON mr.member_id = m.id" +
" INNER JOIN #{table_name_prefix}custom_fields_roles#{table_name_suffix} cfr ON cfr.role_id = mr.role_id" +
" WHERE m.user_id = ?)",
true, user.id)
else
where(:visible => true)
end
}
def visible_by?(project, user=User.current)
visible? || user.admin?
end
def field_format=(arg)
# cannot change format of a saved custom field
super if new_record?
end
def set_searchable
# make sure these fields are not searchable
self.searchable = false if %w(int float date bool).include?(field_format)
# make sure only these fields can have multiple values
self.multiple = false unless %w(list user version).include?(field_format)
true
end
def validate_custom_field
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
if default_value.present? && !valid_field_value?(default_value)
errors.add(:default_value, :invalid)
end
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)}.reduce(:&)
else
[]
end
when 'bool'
[[l(:general_text_Yes), '1'], [l(:general_text_No), '0']]
else
possible_values || []
end
end
def possible_values(obj=nil)
case field_format
when 'user', 'version'
possible_values_options(obj).collect(&:last)
when 'bool'
['1', '0']
else
values = super()
if values.is_a?(Array)
values.each do |value|
value.force_encoding('UTF-8') if value.respond_to?(:force_encoding)
end
values
else
[]
end
end
end
# Makes possible_values accept a multiline string
def possible_values=(arg)
if arg.is_a?(Array)
super(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
def value_from_keyword(keyword, customized)
possible_values_options = possible_values_options(customized)
if possible_values_options.present?
keyword = keyword.to_s.downcase
if v = possible_values_options.detect {|text, id| text.downcase == keyword}
if v.is_a?(Array)
v.last
else
v
end
end
else
keyword
end
end
# Returns a ORDER BY clause that can used to sort customized
# objects by their value of the custom field.
# Returns nil if the custom field can not be used for sorting.
def order_statement
return nil if multiple?
case field_format
when 'string', 'text', 'list', 'date', 'bool'
# COALESCE is here to make sure that blank and NULL values are sorted equally
"COALESCE(#{join_alias}.value, '')"
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
"CAST(CASE #{join_alias}.value WHEN '' THEN '0' ELSE #{join_alias}.value END AS decimal(30,3))"
when 'user', 'version'
value_class.fields_for_order_statement(value_join_alias)
else
nil
end
end
# Returns a GROUP BY clause that can used to group by custom value
# Returns nil if the custom field can not be used for grouping.
def group_statement
return nil if multiple?
case field_format
when 'list', 'date', 'bool', 'int'
order_statement
when 'user', 'version'
"COALESCE(#{join_alias}.value, '')"
else
nil
end
end
def join_for_order_statement
case field_format
when 'user', 'version'
"LEFT OUTER JOIN #{CustomValue.table_name} #{join_alias}" +
" ON #{join_alias}.customized_type = '#{self.class.customized_class.base_class.name}'" +
" AND #{join_alias}.customized_id = #{self.class.customized_class.table_name}.id" +
" AND #{join_alias}.custom_field_id = #{id}" +
" AND (#{visibility_by_project_condition})" +
" AND #{join_alias}.value <> ''" +
" AND #{join_alias}.id = (SELECT max(#{join_alias}_2.id) FROM #{CustomValue.table_name} #{join_alias}_2" +
" WHERE #{join_alias}_2.customized_type = #{join_alias}.customized_type" +
" AND #{join_alias}_2.customized_id = #{join_alias}.customized_id" +
" AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)" +
" LEFT OUTER JOIN #{value_class.table_name} #{value_join_alias}" +
" ON CAST(CASE #{join_alias}.value WHEN '' THEN '0' ELSE #{join_alias}.value END AS decimal(30,0)) = #{value_join_alias}.id"
when 'int', 'float'
"LEFT OUTER JOIN #{CustomValue.table_name} #{join_alias}" +
" ON #{join_alias}.customized_type = '#{self.class.customized_class.base_class.name}'" +
" AND #{join_alias}.customized_id = #{self.class.customized_class.table_name}.id" +
" AND #{join_alias}.custom_field_id = #{id}" +
" AND (#{visibility_by_project_condition})" +
" AND #{join_alias}.value <> ''" +
" AND #{join_alias}.id = (SELECT max(#{join_alias}_2.id) FROM #{CustomValue.table_name} #{join_alias}_2" +
" WHERE #{join_alias}_2.customized_type = #{join_alias}.customized_type" +
" AND #{join_alias}_2.customized_id = #{join_alias}.customized_id" +
" AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)"
when 'string', 'text', 'list', 'date', 'bool'
"LEFT OUTER JOIN #{CustomValue.table_name} #{join_alias}" +
" ON #{join_alias}.customized_type = '#{self.class.customized_class.base_class.name}'" +
" AND #{join_alias}.customized_id = #{self.class.customized_class.table_name}.id" +
" AND #{join_alias}.custom_field_id = #{id}" +
" AND (#{visibility_by_project_condition})" +
" AND #{join_alias}.id = (SELECT max(#{join_alias}_2.id) FROM #{CustomValue.table_name} #{join_alias}_2" +
" WHERE #{join_alias}_2.customized_type = #{join_alias}.customized_type" +
" AND #{join_alias}_2.customized_id = #{join_alias}.customized_id" +
" AND #{join_alias}_2.custom_field_id = #{join_alias}.custom_field_id)"
else
nil
end
end
def join_alias
"cf_#{id}"
end
def value_join_alias
join_alias + "_" + field_format
end
def visibility_by_project_condition(project_key=nil, user=User.current)
if visible? || user.admin?
"1=1"
elsif user.anonymous?
"1=0"
else
project_key ||= "#{self.class.customized_class.table_name}.project_id"
"#{project_key} IN (SELECT DISTINCT m.project_id FROM #{Member.table_name} m" +
" INNER JOIN #{MemberRole.table_name} mr ON mr.member_id = m.id" +
" INNER JOIN #{table_name_prefix}custom_fields_roles#{table_name_suffix} cfr ON cfr.role_id = mr.role_id" +
" WHERE m.user_id = #{user.id} AND cfr.custom_field_id = #{id})"
end
end
def self.visibility_condition
if user.admin?
"1=1"
elsif user.anonymous?
"#{table_name}.visible"
else
"#{project_key} IN (SELECT DISTINCT m.project_id FROM #{Member.table_name} m" +
" INNER JOIN #{MemberRole.table_name} mr ON mr.member_id = m.id" +
" INNER JOIN #{table_name_prefix}custom_fields_roles#{table_name_suffix} cfr ON cfr.role_id = mr.role_id" +
" WHERE m.user_id = #{user.id} AND cfr.custom_field_id = #{id})"
end
end
def <=>(field)
position <=> field.position
end
# Returns the class that values represent
def value_class
case field_format
when 'user', 'version'
field_format.classify.constantize
else
nil
end
end
def self.customized_class
self.name =~ /^(.+)CustomField$/
$1.constantize rescue nil
end
# to move in project_custom_field
def self.for_all
where(:is_for_all => true).order('position').all
end
def type_name
nil
end
# Returns the error messages for the given value
# or an empty array if value is a valid value for the custom field
def validate_field_value(value)
errs = []
if value.is_a?(Array)
if !multiple?
errs << ::I18n.t('activerecord.errors.messages.invalid')
end
if is_required? && value.detect(&:present?).nil?
errs << ::I18n.t('activerecord.errors.messages.blank')
end
value.each {|v| errs += validate_field_value_format(v)}
else
if is_required? && value.blank?
errs << ::I18n.t('activerecord.errors.messages.blank')
end
errs += validate_field_value_format(value)
end
errs
end
# Returns true if value is a valid value for the custom field
def valid_field_value?(value)
validate_field_value(value).empty?
end
def format_in?(*args)
args.include?(field_format)
end
protected
# Returns the error message for the given value regarding its format
def validate_field_value_format(value)
errs = []
if value.present?
errs << ::I18n.t('activerecord.errors.messages.invalid') unless regexp.blank? or value =~ Regexp.new(regexp)
errs << ::I18n.t('activerecord.errors.messages.too_short', :count => min_length) if min_length > 0 and value.length < min_length
errs << ::I18n.t('activerecord.errors.messages.too_long', :count => max_length) if max_length > 0 and value.length > max_length
# Format specific validations
case field_format
when 'int'
errs << ::I18n.t('activerecord.errors.messages.not_a_number') unless value =~ /^[+-]?\d+$/
when 'float'
begin; Kernel.Float(value); rescue; errs << ::I18n.t('activerecord.errors.messages.invalid') end
when 'date'
errs << ::I18n.t('activerecord.errors.messages.not_a_date') unless value =~ /^\d{4}-\d{2}-\d{2}$/ && begin; value.to_date; rescue; false end
when 'list'
errs << ::I18n.t('activerecord.errors.messages.inclusion') unless possible_values.include?(value)
end
end
errs
end
# Removes multiple values for the custom field after setting the multiple attribute to false
# We kepp the value with the highest id for each customized object
def handle_multiplicity_change
if !new_record? && multiple_was && !multiple
ids = custom_values.
where("EXISTS(SELECT 1 FROM #{CustomValue.table_name} cve WHERE cve.custom_field_id = #{CustomValue.table_name}.custom_field_id" +
" AND cve.customized_type = #{CustomValue.table_name}.customized_type AND cve.customized_id = #{CustomValue.table_name}.customized_id" +
" AND cve.id > #{CustomValue.table_name}.id)").
pluck(:id)
if ids.any?
custom_values.where(:id => ids).delete_all
end
end
end
end