无法将 model 数据作为 rails 中的树

Question

我正在尝试分别使用以下模型和架构构建树

一个）

class RecruitmentPhase < ApplicationRecord
  belongs_to :cohort, optional: true
  belongs_to :parent, class_name: 'Cohort', required: false , dependent: :destroy
  has_many :disease_phaseid_questionnaires, dependent: :destroy, foreign_key: :phase_id
  def phase_name_ret
    phase_name
  end
end

  create_table "recruitment_phases", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
    t.integer "phase_id"
    t.string "phase_token"
    t.string "phase_name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.integer "parent_id"
  end

b)

class Cohort < ApplicationRecord
end

  create_table "cohorts", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
    t.string "disease_code_id"
    t.string "disease_name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.bigint "patient_id"
    t.integer "recruitment_phase_ids"
    t.index ["patient_id"], name: "index_cohorts_on_patient_id"
  end

C）

class Source < ApplicationRecord
  belongs_to :recruitment_phase, class_name: 'recruitment_phase', foreign_key: 'recruitment_phase_id'
end

  create_table "sources", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
    t.integer "source_id"
    t.string "source_token"
    t.string "source_name"
    t.string "description"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

我想使用闭包树对 model 数据进行如下处理，但由于它们是具有不同数据成员的多个模型而未能这样做。 谁能让我知道如何解决这个问题？

Cohort
  |_____RecruitmentPhase
           |_______________Source

Answer 1

rails generate model Transactions Cohort
rails generate model RecruitmentPhase Cohort:references
rails generate model Source RecruitmentPhase:references

model

Cohort.rb
has_many:RecruitmentPhases
has_many:Sources

RecruitmentPhase.rb
has_many:Sources
belongs_to:Cohort

Sources.rb
belongs_to:Cohort
belongs_to:RecruitmentPhase