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89 lines
3.0 KiB
89 lines
3.0 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
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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 version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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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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#
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# See doc/COPYRIGHT.rdoc for more details.
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#++
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module CustomField::OrderStatements
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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_statements
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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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[
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<<-SQL
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COALESCE(#{select_custom_value_as_string}, '')
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SQL
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]
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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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[
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select_custom_value_as_decimal
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]
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when 'user'
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[
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order_by_user_sql('lastname'),
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order_by_user_sql('firstname'),
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order_by_user_sql('id')
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]
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end
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end
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private
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def select_custom_value_as_string
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<<-SQL
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(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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SQL
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end
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def select_custom_value_as_decimal
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<<-SQL
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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}
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AND cv_sort.value <> ''
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AND cv_sort.value IS NOT NULL
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LIMIT 1)
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SQL
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end
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def order_by_user_sql(column)
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<<-SQL
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(SELECT #{column} FROM #{User.table_name} cv_user
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WHERE cv_user.id = #{select_custom_value_as_decimal}
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LIMIT 1)
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SQL
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end
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end
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