diff app/models/custom_field.rb @ 1298:4f746d8966dd redmine_2.3_integration

Merge from redmine-2.3 branch to create new branch redmine-2.3-integration

--- a/app/models/custom_field.rb	Fri Jun 14 09:07:32 2013 +0100
+++ b/app/models/custom_field.rb	Fri Jun 14 09:28:30 2013 +0100
@@ -1,5 +1,5 @@
 # Redmine - project management software
-# Copyright (C) 2006-2012  Jean-Philippe Lang
+# 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
@@ -29,6 +29,9 @@
 
   validate :validate_custom_field
   before_validation :set_searchable
+  after_save :handle_multiplicity_change
+
+  scope :sorted, lambda { order("#{table_name}.position ASC") }
 
   CUSTOM_FIELDS_TABS = [
     {:name => 'IssueCustomField', :partial => 'custom_fields/index',
@@ -169,7 +172,7 @@
       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.
@@ -178,18 +181,12 @@
     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.base_class.name}'" +
-          " AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
-          " AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
+        "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
-        "(SELECT CAST(cv_sort.value AS decimal(60,3)) FROM #{CustomValue.table_name} cv_sort" +
-          " WHERE cv_sort.customized_type='#{self.class.customized_class.base_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)"
+        "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
@@ -199,16 +196,13 @@
 
   # 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 
+  def group_statement
     return nil if multiple?
     case field_format
       when 'list', 'date', 'bool', 'int'
         order_statement
       when 'user', 'version'
-        "COALESCE((SELECT cv_sort.value FROM #{CustomValue.table_name} cv_sort" +
-          " WHERE cv_sort.customized_type='#{self.class.customized_class.base_class.name}'" +
-          " AND cv_sort.customized_id=#{self.class.customized_class.table_name}.id" +
-          " AND cv_sort.custom_field_id=#{id} LIMIT 1), '')"
+        "COALESCE(#{join_alias}.value, '')"
       else
         nil
     end
@@ -227,7 +221,26 @@
             " 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(#{join_alias}.value as decimal(60,0)) = #{value_join_alias}.id"
+          " 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 #{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 #{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
@@ -262,7 +275,7 @@
 
   # to move in project_custom_field
   def self.for_all
-    find(:all, :conditions => ["is_for_all=?", true], :order => 'position')
+    where(:is_for_all => true).order('position').all
   end
 
   def type_name
@@ -323,4 +336,20 @@
     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