mysql - Rails 1 to 2 Polymorphic -


i'm having trouble implementing 1-to-2 association, polymorphic. have 3 models involved in this, rule, ip , ipgroup. each rule has 2 of ipish, can either ip or ipgroup. however, when loading entries db, ipish_from , ipish_to remain nil. also, don't confused class_name: "ipish", there no explicit class in project named "ipish"; in older version of project not polymorphic , said class_name: "ip".

class rule   belongs_to :ipish_from, class_name: "ipish", foreign_key: :ipish_id_from, polymorphic: true   belongs_to :ipish_to, class_name: "ipish", foreign_key: :ipish_id_to, polymorphic: true end  class ip   has_and_belongs_to_many :ip_groups   has_many :rules_from, as: :ipish   has_many :rules_to, as: :ipish end  class ipgroup   has_and_belongs_to_many :ips   has_many :rules_from, as: :ipish   has_many :rules_to, as: :ipish end

the table in mysql-db looks this

++++++++++++++++++++++++++++ + rules                    + ++++++++++++++++++++++++++++ + ipish_id_from: int       + + ipish_type_from: string  + + ipish_id_to: int         + + ipish_type_to: string    + ++++++++++++++++++++++++++++

any tips on how should doing this? must use polymorphic associations this. also, problem exist because of how objects related; know how "standard" polymorphism works. maybe rails expects different column name determine type of ipish object? haven't found says how change rails expects, unfortunately.


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