diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/join_dependency.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/join_dependency.rb | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb index e589959cf2..28e081c03c 100644 --- a/activerecord/lib/active_record/associations/join_dependency.rb +++ b/activerecord/lib/active_record/associations/join_dependency.rb @@ -5,10 +5,31 @@ module ActiveRecord autoload :JoinBase, 'active_record/associations/join_dependency/join_base' autoload :JoinAssociation, 'active_record/associations/join_dependency/join_association' - attr_reader :join_parts, :reflections, :alias_tracker, :active_record - + attr_reader :join_parts, :reflections, :alias_tracker, :base_klass + + # base is the base class on which operation is taking place. + # associations is the list of associations which are joined using hash, symbol or array. + # joins is the list of all string join commnads and arel nodes. + # + # Example : + # + # class Physician < ActiveRecord::Base + # has_many :appointments + # has_many :patients, through: :appointments + # end + # + # If I execute `@physician.patients.to_a` then + # base #=> Physician + # associations #=> [] + # joins #=> [#<Arel::Nodes::InnerJoin: ...] + # + # However if I execute `Physician.joins(:appointments).to_a` then + # base #=> Physician + # associations #=> [:appointments] + # joins #=> [] + # def initialize(base, associations, joins) - @active_record = base + @base_klass = base @table_joins = joins @join_parts = [JoinBase.new(base)] @associations = {} @@ -54,10 +75,12 @@ module ActiveRecord parent }.uniq - remove_duplicate_results!(active_record, records, @associations) + remove_duplicate_results!(base_klass, records, @associations) records end + protected + def remove_duplicate_results!(base, records, associations) case associations when Symbol, String @@ -88,8 +111,6 @@ module ActiveRecord end end - protected - def cache_joined_association(association) associations = [] parent = association.parent @@ -109,7 +130,7 @@ module ActiveRecord case associations when Symbol, String reflection = parent.reflections[associations.intern] or - raise ConfigurationError, "Association named '#{ associations }' was not found; perhaps you misspelled it?" + raise ConfigurationError, "Association named '#{ associations }' was not found on #{ parent.base_klass.name }; perhaps you misspelled it?" unless join_association = find_join_association(reflection, parent) @reflections << reflection join_association = build_join_association(reflection, parent) |