def association_join
join = case reflection.macro
when :has_and_belongs_to_many
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_alias_for(options[:join_table], aliased_join_table_name),
aliased_join_table_name,
options[:foreign_key] || reflection.active_record.to_s.classify.foreign_key,
reflection.active_record.table_name, reflection.active_record.primary_key] +
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_name_and_alias, aliased_table_name, klass.primary_key,
aliased_join_table_name, options[:association_foreign_key] || klass.table_name.classify.foreign_key
]
when :has_many, :has_one
case
when reflection.macro == :has_many && reflection.options[:through]
through_conditions = through_reflection.options[:conditions] ? "AND #{interpolate_sql(sanitize_sql(through_reflection.options[:conditions]))}" : ''
if through_reflection.options[:as]
polymorphic_foreign_key = through_reflection.options[:as].to_s + '_id'
polymorphic_foreign_type = through_reflection.options[:as].to_s + '_type'
" LEFT OUTER JOIN %s ON (%s.%s = %s.%s AND %s.%s = %s) " % [
table_alias_for(through_reflection.klass.table_name, aliased_join_table_name),
aliased_join_table_name, polymorphic_foreign_key,
parent.aliased_table_name, parent.primary_key,
aliased_join_table_name, polymorphic_foreign_type, klass.quote(parent.active_record.base_class.name)] +
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [table_name_and_alias,
aliased_table_name, primary_key, aliased_join_table_name, options[:foreign_key] || reflection.klass.to_s.classify.foreign_key
]
else
if source_reflection.macro == :has_many && source_reflection.options[:as]
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_alias_for(through_reflection.klass.table_name, aliased_join_table_name), aliased_join_table_name,
through_reflection.primary_key_name,
parent.aliased_table_name, parent.primary_key] +
" LEFT OUTER JOIN %s ON %s.%s = %s.%s AND %s.%s = %s " % [
table_name_and_alias,
aliased_table_name, "#{source_reflection.options[:as]}_id",
aliased_join_table_name, options[:foreign_key] || primary_key,
aliased_table_name, "#{source_reflection.options[:as]}_type",
klass.quote(source_reflection.active_record.base_class.name)
]
else
case source_reflection.macro
when :belongs_to
first_key = primary_key
second_key = options[:foreign_key] || klass.to_s.classify.foreign_key
when :has_many
first_key = through_reflection.klass.to_s.classify.foreign_key
second_key = options[:foreign_key] || primary_key
end
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_alias_for(through_reflection.klass.table_name, aliased_join_table_name), aliased_join_table_name,
through_reflection.primary_key_name,
parent.aliased_table_name, parent.primary_key] +
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_name_and_alias,
aliased_table_name, first_key,
aliased_join_table_name, second_key
]
end
end
when reflection.macro == :has_many && reflection.options[:as]
" LEFT OUTER JOIN %s ON %s.%s = %s.%s AND %s.%s = %s" % [
table_name_and_alias,
aliased_table_name, "#{reflection.options[:as]}_id",
parent.aliased_table_name, parent.primary_key,
aliased_table_name, "#{reflection.options[:as]}_type",
klass.quote(parent.active_record.base_class.name)
]
when reflection.macro == :has_one && reflection.options[:as]
" LEFT OUTER JOIN %s ON %s.%s = %s.%s AND %s.%s = %s " % [
table_name_and_alias,
aliased_table_name, "#{reflection.options[:as]}_id",
parent.aliased_table_name, parent.primary_key,
aliased_table_name, "#{reflection.options[:as]}_type",
klass.quote(reflection.active_record.base_class.name)
]
else
foreign_key = options[:foreign_key] || reflection.active_record.name.foreign_key
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_name_and_alias,
aliased_table_name, foreign_key,
parent.aliased_table_name, parent.primary_key
]
end
when :belongs_to
" LEFT OUTER JOIN %s ON %s.%s = %s.%s " % [
table_name_and_alias, aliased_table_name, reflection.klass.primary_key,
parent.aliased_table_name, options[:foreign_key] || klass.to_s.foreign_key
]
else
""
end || ''
join << %(AND %s.%s = %s ) % [
aliased_table_name,
reflection.active_record.connection.quote_column_name(reflection.active_record.inheritance_column),
klass.quote(klass.name)] unless klass.descends_from_active_record?
join << "AND #{interpolate_sql(sanitize_sql(reflection.options[:conditions]))} " if reflection.options[:conditions]
join
end