我有这样愤怒的联想:融资>-事件>-子项目>-项目。我想通过所有程序访问last_financings,所以代码是:
class Fcp < Program
has_many :fcp_subprograms,
:foreign_key => 'parent_id'
has_many :subprogram_last_actual_financings,
:through => :fcp_subprograms,
:source => :last_actual_financings
class FcpSubprogram < Program
belongs_to :fcp,
:class_name => 'Fcp',
:foreign_key => 'parent_id'
has_many :events,
:foreign_key => 'fcp_id'
has_many :last_actual_financings,
:through => :events,
:source => :last_actual_financings
class Event < ActiveRecord::Base
belongs_to :fcp,
:class_name => 'Fcp',
:foreign_key => 'fcp_id'
belongs_to :fcp_subprogram,
:class_name => 'FcpSubprogram',
:foreign_key => 'fcp_id'
has_many :last_actual_financings,
:class_name => 'ActualFinancing',
:order => 'date DESC',
:limit => 1
因此,当我想访问 after_initialize 函数中的 subprogram_last_actual_financings 时,我收到此错误
Invalid source reflection macro :has_many :through for has_many :subprogram_last_actual_financings, :through => :fcp_subprograms. Use :source to specify the source reflection.
但我的关联中有 :source 选项。我究竟做错了什么?