RoR 和 Postgresql 数据库：belongs_to 关联有效，但无效 has_many

Question

我有两个模特，

class Store < ApplicationRecord self.primary_key = 'storeid' has_many : employees end

class Employee < ApplicationRecord belongs_to :store, optional: true, foreign_key: :storeid end

与以下schema.rb,

  create_table "employees", force: :cascade do |t|
    t.text "storeid", null: false
    t.index ["store_id"], name: "index_employees_on_store_id"
  end

  create_table "stores", force: :cascade do |t|
    t.text "storeid", null: false
    t.index ["storeid"], name: "index_stores_on_storeid", unique: true
  end

  add_foreign_key "employees", "stores", column: "store_id"
  add_foreign_key "employees", "stores", column: "storeid", primary_key: "storeid"
end

我的问题是，当我转到 rails 控制台并尝试查询 Store.first.employees 时，我只是获得了对模型的引用，然后它崩溃了。当我做 Employee.first.stores 它 returns 适当的关联商店给员工。

p.s。我知道，Rails 命名约定问题

编辑 0: 这是我最近的迁移

class Keys < ActiveRecord::Migration[6.0]
  def up
    add_index :stores, [:storeid], :unique => true
    add_reference :employees, :stores, foreign_key: true
    add_foreign_key :employees, :stores, column: :storeid, primary_key: :"storeid"
  end

  def down
    execute "ALTER TABLE stores DROP CONSTRAINT table_pkey;"
  end
end

表迁移：

class Stores < ActiveRecord::Migration[6.0]
  def change
    create_table :stores do |t|
      t.column :storeid, :text, null: false, unique: true
      t.column :contactname, :text, null: true
    end
  end
end

class Employees < ActiveRecord::Migration[6.0]
  def change
    create_table :employees do |t|
      t.column :storeid, :text, null: false, unique: true
      t.column :name, :text, null: true
    end
  end
end

Answer 1

您的 Store 模型似乎缺少外键：

class Store < ApplicationRecord
  self.primary_key = 'storeid'
  has_many :employees, foreign_key: :storeid
end

RoR 和 Postgresql 数据库：belongs_to 关联有效，但无效 has_many

RoR and Postgresql DB: belongs_to association works, but not has_many

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