使用这些关联,只有放大结果会返回正确的结果,但是当我尝试搜索第二个关联时,它将返回 0 个结果。
has_one :magnification,
:class_name => 'ProductAttribute',
:foreign_key => 'product_id',
:conditions => {:key => 'Magnification'}
has_one :objective_lens,
:class_name => 'ProductAttribute',
:foreign_key => 'product_id',
:conditions => {:key => 'Objective Lens Diameter'}
define_index do
has magnification(:value), :type => :float, :as => :magnification
has objective_lens(:value), :type => :float, :as => :objective_lens_diameter
end
使用的示例代码
# returns expected results
Product.search(nil, :with => {:magnification => (8.0..9.0)})
# returns 0 results
Product.search(nil, :with => {:objective_lens_diameter => (31.0..61.0)})
但是当我颠倒 define_index 的顺序时,就会发生相反的情况。因此物镜直径结果返回正确的结果,放大倍率结果返回 0。
使用 Rails v2.2、Thinking-Sphinx 作为插件 v1.2.12 和 Sphinx 0.9.8
编辑:查看生成的 sql_query 值显示第二个属性的连接使用了错误的关联,因此它不会返回预期的结果。
简化结果:
SELECT
`products`.`id` * 2 + 1 AS `id`,
`products`.`id` AS `sphinx_internal_id`,
1234567890 AS `class_crc`,
`product_attributes`.`value` AS `magnification`,
`objective_lens_products`.`value` AS `objective_lens_diameter`
FROM `products`
LEFT OUTER JOIN `product_attributes` ON product_attributes.product_id = products.id
AND `product_attributes`.`key` = 'Magnification'
LEFT OUTER JOIN `product_attributes` objective_lens_products ON objective_lens_products.product_id = products.id
AND `product_attributes`.`key` = 'Objective Lens Diameter'
WHERE `products`.`id` >= $start
AND `products`.`id` <= $end
GROUP BY `products`.`id`
ORDER BY NULL