英文:
Saving Calculated Data when using rails_admin gem
问题
在我的项目中，我有product模型和stock_in模型，使用rails_admin宝石，如何在为该产品创建新的stock_in时自动更新产品的数量？
英文:
In my project i have product model and stock_in model, using rails_admin gem how can i update a quantity of a product automatically when new stock_in is created for that product?
答案1
得分: 0
Without seeing any code, it's hard to give you anything more than general advice.
You don't need to do this through rails_admin because Rails already has hooks.
Assuming your Product and StockIn models are related:
class Product
has_many :stock_ins
end
class StockIn
belongs_to :product
end
You can just use an after_create hook on StockIn:
class StockIn
belongs_to :product
after_create :update_product_quantity
...
private
def update_product_quantity
product.update(quantity: self.quantity)
end
end
英文:
Without seeing any code, it's hard to give you anything more than general advice.
You don't need to do this through rails_admin because Rails already has hooks.
Assuming your Product and StockIn models are related:
class Product
has_many :stock_ins
end
class StockIn
belongs_to :product
end
You can just use an after_create hook on StockIn:
class StockIn
belongs_to :product
after_create :update_product_quantity
...
private
def update_product_quantity
product.update(quantity: self.quantity)
end
end
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