Make sure we don't cast an empty string to numeric (#12713).

SQLServer evaluates the CAST condition even if the <> '' condition is false.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11103 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/custom_field.rb

@@ -185,7 +185,7 @@ class CustomField < ActiveRecord::Base
         # 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(#{join_alias}.value AS decimal(30,3))"
+        "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
@@ -220,7 +220,7 @@ class CustomField < ActiveRecord::Base
             " 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(30,0)) = #{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}'" +

app/models/query.rb

@@ -532,13 +532,13 @@ class Query < ActiveRecord::Base
           sql = date_clause(db_table, db_field, (Date.parse(value.first) rescue nil), (Date.parse(value.first) rescue nil))
         when :integer
           if is_custom_filter
-            sql = "(#{db_table}.#{db_field} <> '' AND CAST(#{db_table}.#{db_field} AS decimal(30,3)) = #{value.first.to_i})"
+            sql = "(#{db_table}.#{db_field} <> '' AND CAST(CASE #{db_table}.#{db_field} WHEN '' THEN '0' ELSE #{db_table}.#{db_field} END AS decimal(30,3)) = #{value.first.to_i})"
           else
             sql = "#{db_table}.#{db_field} = #{value.first.to_i}"
           end
         when :float
           if is_custom_filter
-            sql = "(#{db_table}.#{db_field} <> '' AND CAST(#{db_table}.#{db_field} AS decimal(30,3)) BETWEEN #{value.first.to_f - 1e-5} AND #{value.first.to_f + 1e-5})"
+            sql = "(#{db_table}.#{db_field} <> '' AND CAST(CASE #{db_table}.#{db_field} WHEN '' THEN '0' ELSE #{db_table}.#{db_field} END AS decimal(30,3)) BETWEEN #{value.first.to_f - 1e-5} AND #{value.first.to_f + 1e-5})"
           else
             sql = "#{db_table}.#{db_field} BETWEEN #{value.first.to_f - 1e-5} AND #{value.first.to_f + 1e-5}"
           end
@@ -567,7 +567,7 @@ class Query < ActiveRecord::Base
         sql = date_clause(db_table, db_field, (Date.parse(value.first) rescue nil), nil)
       else
         if is_custom_filter
-          sql = "(#{db_table}.#{db_field} <> '' AND CAST(#{db_table}.#{db_field} AS decimal(30,3)) >= #{value.first.to_f})"
+          sql = "(#{db_table}.#{db_field} <> '' AND CAST(CASE #{db_table}.#{db_field} WHEN '' THEN '0' ELSE #{db_table}.#{db_field} END AS decimal(30,3)) >= #{value.first.to_f})"
         else
           sql = "#{db_table}.#{db_field} >= #{value.first.to_f}"
         end
@@ -577,7 +577,7 @@ class Query < ActiveRecord::Base
         sql = date_clause(db_table, db_field, nil, (Date.parse(value.first) rescue nil))
       else
         if is_custom_filter
-          sql = "(#{db_table}.#{db_field} <> '' AND CAST(#{db_table}.#{db_field} AS decimal(30,3)) <= #{value.first.to_f})"
+          sql = "(#{db_table}.#{db_field} <> '' AND CAST(CASE #{db_table}.#{db_field} WHEN '' THEN '0' ELSE #{db_table}.#{db_field} END AS decimal(30,3)) <= #{value.first.to_f})"
         else
           sql = "#{db_table}.#{db_field} <= #{value.first.to_f}"
         end
@@ -587,7 +587,7 @@ class Query < ActiveRecord::Base
         sql = date_clause(db_table, db_field, (Date.parse(value[0]) rescue nil), (Date.parse(value[1]) rescue nil))
       else
         if is_custom_filter
-          sql = "(#{db_table}.#{db_field} <> '' AND CAST(#{db_table}.#{db_field} AS decimal(30,3)) BETWEEN #{value[0].to_f} AND #{value[1].to_f})"
+          sql = "(#{db_table}.#{db_field} <> '' AND CAST(CASE #{db_table}.#{db_field} WHEN '' THEN '0' ELSE #{db_table}.#{db_field} END AS decimal(30,3)) BETWEEN #{value[0].to_f} AND #{value[1].to_f})"
         else
           sql = "#{db_table}.#{db_field} BETWEEN #{value[0].to_f} AND #{value[1].to_f}"
         end