Question

我使用counter_culture gem，但是当我想使用它时，它会抛出一个错误，它无法在Product模型中找到product_id字段，这是有道理的，因为它应该寻找'id'。

以下是我调用'Product.counter_culture_fix_counts'时生成的查询。正如您所看到的，它产生了'LEFT JOIN产品AS产品ON product_categories.id = products.product_id'，这是不正确的，它应该是'LEFT JOIN产品AS产品ON product_categories.product_id = products.id'。

SELECT  categories.id, categories.id, COUNT(products.id) AS count, categories.products_count FROM "categories" LEFT JOIN product_categories AS product_categories ON categories.id = product_categories.category_id LEFT JOIN products AS products ON product_categories.id = products.product_id AND (products.active = 't') GROUP BY "categories"."id"  ORDER BY "categories"."id" ASC LIMIT 1000 OFFSET 0

以下是模特：

# Product Model

class Product
   has_one :product_category, dependent: :destroy
   has_one :category, :through => :product_category

   counter_culture [:product_category, :category], :column_name => Proc.new { |product| 'products_count' }, :column_names => { ["products.active = ?", true] => 'products_count' }, :touch => true
end

# ProductCategory Model

class ProductCategory
   belongs_to :product
   belongs_to :category
end

# Category Model

class Category
   has_many :product_categories, dependent: :destroy
   has_many :products, :through => :product_categories
end

知道如何让这个工作吗？谢谢你，米罗

Counter_culture for has_one relationship（rails）

0 个答案: