使用includes和

Question

目前我得到了这个：

Country.includes(products: [:categories]).where("products.categories.name = ?", "Gardening").references(products: [:categories])

这段代码有问题吗？或者我们不允许为二级子对象写条件？

Answer 1

您可以通过使用获得相同的答案 Different ways of eager loading

r = Country.joins(products: [:categories]).where("products.categories.name = ?", "Gardening").preload(products: [:categories])

Answer 2

为了简单起见，只需做

Country.joins(products: [:categories]).where("categories.name = ?", "Gardening")

或：

Country.joins(products: [:categories]).where(categories: {name: "Gardening"})