如何使用循环删除特定记录的所有相关记录？ （不使用依赖）

Question

如何使用循环删除特定记录的所有关联记录？    当我在那时删除一个特定卖家时，应该删除他们的相关记录。 例如。当一个卖家被删除时，他们的产品，客户，卖家市场应该被删除。（不应该删除市场。）

class Seller < ActiveRecord::Base
    has_many :products
    has_many :customers
    has_many :seller_marketplaces
    has_many :marketplaces through: :seller_marketplaces
end

Answer 1

你的模特应该是： -

  onClick1(){
    ScannerInteractor.startScan(this, null, null);
    //alert('cllllll');
  }

假设你有一个卖家

class Seller < ActiveRecord::Base
    has_many :products
    has_many :customers
    has_many :seller_marketplaces
    has_many :marketplaces through: :seller_marketplaces
end

Answer 2

您可以使用after_destroy回调

class Seller < ActiveRecord::Base
 has_many :products
 has_many :customers
 has_many :seller_marketplaces
 has_many :marketplaces through: :seller_marketplaces
 after_destroy :destroy_related_records

 def destroy_related_records
  #delete products
  products.each do |product|
    product.destroy
  end

  #delete customers
  customers.each do |customer|
    customer.destroy
  end

  #delete seller_marketplaces
  seller_marketplaces.each do |seller_marketplace|
    seller_marketplace.destroy
  end
 end
end