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author | Rick Olson <technoweenie@gmail.com> | 2006-03-19 02:01:40 +0000 |
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committer | Rick Olson <technoweenie@gmail.com> | 2006-03-19 02:01:40 +0000 |
commit | 0925c6b6a06dd9fb5599d24ec9c2f4e11282bc12 (patch) | |
tree | e7ef51eb0343a1f6a255da151e458502869cd105 /activerecord/lib | |
parent | 8463cd646ec5b8f439577a7c2ca225179709b5ed (diff) | |
download | rails-0925c6b6a06dd9fb5599d24ec9c2f4e11282bc12.tar.gz rails-0925c6b6a06dd9fb5599d24ec9c2f4e11282bc12.tar.bz2 rails-0925c6b6a06dd9fb5599d24ec9c2f4e11282bc12.zip |
Allow has_many :through to work on has_many associations (closes #3864) [sco@scottraymond.net]
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3964 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activerecord/lib')
-rw-r--r-- | activerecord/lib/active_record/associations/has_many_through_association.rb | 53 | ||||
-rw-r--r-- | activerecord/lib/active_record/reflection.rb | 6 |
2 files changed, 40 insertions, 19 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb index 562d0e93fb..1baac52cdd 100644 --- a/activerecord/lib/active_record/associations/has_many_through_association.rb +++ b/activerecord/lib/active_record/associations/has_many_through_association.rb @@ -26,6 +26,7 @@ module ActiveRecord options[:select] = construct_select options[:from] = construct_from + options[:joins] = construct_joins merge_options_from_reflection!(options) @@ -53,44 +54,57 @@ module ActiveRecord :select => construct_select, :conditions => construct_conditions, :from => construct_from, + :joins => construct_joins, :order => @reflection.options[:order], :limit => @reflection.options[:limit], - :joins => @reflection.options[:joins], :group => @reflection.options[:group] ) end - def construct_conditions - # Get the actual primary key of the belongs_to association that the reflection is going through - source_primary_key = @reflection.source_reflection.primary_key_name - - if @reflection.through_reflection.options[:as] - conditions = - "#{@reflection.table_name}.#{@reflection.klass.primary_key} = #{@reflection.through_reflection.table_name}.#{source_primary_key} " + - "AND #{@reflection.through_reflection.table_name}.#{@reflection.through_reflection.options[:as]}_id = #{@owner.quoted_id} " + + def construct_conditions + conditions = if @reflection.through_reflection.options[:as] + "#{@reflection.through_reflection.table_name}.#{@reflection.through_reflection.options[:as]}_id = #{@owner.quoted_id} " + "AND #{@reflection.through_reflection.table_name}.#{@reflection.through_reflection.options[:as]}_type = #{@owner.class.quote @owner.class.base_class.name.to_s}" else - conditions = - "#{@reflection.klass.table_name}.#{@reflection.klass.primary_key} = #{@reflection.through_reflection.table_name}.#{source_primary_key} " + - "AND #{@reflection.through_reflection.table_name}.#{@reflection.through_reflection.primary_key_name} = #{@owner.quoted_id}" + case @reflection.source_reflection.macro + when :belongs_to, :has_many + "#{@reflection.through_reflection.table_name}.#{@reflection.through_reflection.primary_key_name} = #{@owner.quoted_id}" + else + raise ActiveRecordError, "Invalid source reflection macro :#{@reflection.source_reflection.macro} for has_many #{@reflection.name}, :through => #{@reflection.through_reflection.name}" + end end - conditions << " AND (#{sql_conditions})" if sql_conditions return conditions end def construct_from - "#{@owner.class.reflections[@reflection.options[:through]].table_name}, #{@reflection.table_name}" + @reflection.table_name end def construct_select selected = @reflection.options[:select] || "#{@reflection.table_name}.*" end + def construct_joins + if @reflection.through_reflection.options[:as] || @reflection.source_reflection.macro == :belongs_to + reflection_primary_key = @reflection.klass.primary_key + source_primary_key = @reflection.source_reflection.primary_key_name + else + reflection_primary_key = @reflection.source_reflection.primary_key_name + source_primary_key = @reflection.klass.primary_key + end + + "INNER JOIN %s ON %s.%s = %s.%s #{@reflection.options[:joins]}" % [ + @owner.class.reflections[@reflection.options[:through]].table_name, + @reflection.table_name, reflection_primary_key, + @reflection.through_reflection.table_name, source_primary_key + ] + end + def construct_scope { - :find => { :from => construct_from, :conditions => construct_conditions }, + :find => { :from => construct_from, :conditions => construct_conditions, :joins => construct_joins }, :create => { @reflection.primary_key_name => @owner.id } } end @@ -115,9 +129,14 @@ module ActiveRecord end end - def sql_conditions - @conditions ||= interpolate_sql(@reflection.active_record.send(:sanitize_sql, @reflection.through_reflection.options[:conditions])) if @reflection.through_reflection.options[:conditions] + def conditions + @conditions ||= [ + (interpolate_sql(@reflection.active_record.send(:sanitize_sql, @reflection.options[:conditions])) if @reflection.options[:conditions]), + (interpolate_sql(@reflection.active_record.send(:sanitize_sql, @reflection.through_reflection.options[:conditions])) if @reflection.through_reflection.options[:conditions]) + ].compact.collect { |condition| "(#{condition})" }.join(' AND ') unless (!@reflection.options[:conditions] && !@reflection.through_reflection.options[:conditions]) end + + alias_method :sql_conditions, :conditions end end end diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb index 3011ba6625..0d3333e0e1 100644 --- a/activerecord/lib/active_record/reflection.rb +++ b/activerecord/lib/active_record/reflection.rb @@ -156,7 +156,9 @@ module ActiveRecord # def source_reflection return nil unless through_reflection - @source_reflection ||= through_reflection.klass.reflect_on_association(source_reflection_name) + @source_reflection ||= \ + through_reflection.klass.reflect_on_association(source_reflection_name) || # has_many :through a :belongs_to + through_reflection.klass.reflect_on_association(name) # has_many :through a :has_many end def check_validity! @@ -183,7 +185,7 @@ module ActiveRecord if options[:class_name] options[:class_name] elsif through_reflection # get the class_name of the belongs_to association of the through reflection - through_reflection.klass.reflect_on_association(name.to_s.singularize.to_sym).class_name + source_reflection.class_name else class_name = name.to_s.camelize class_name = class_name.singularize if [ :has_many, :has_and_belongs_to_many ].include?(macro) |