Question

我有一个名为products的表，其中包含字段ID，NAME，URL，BRAND 然后我有一个名为product_filter的字段，其中包含字段ID，PRODUCT_ID，TYPE，VALUE

假设我有以下产品表

1 |产品1 |产品-1 |品牌1 2 |产品2 |产品-2 |品牌2 3 |产品3 |产品-3 |品牌1

和product_filter表

1 | 1 |材料|羊毛
2 | 1 |材料|棉花
3 | 2 |材料|棉花
4 | 3 |材料|羊毛
5 | 1 |季节|下跌
5 | 2 |季节|下跌
5 | 1 |季节|所有

等等

现在，当客户在网页上并尝试过滤

时材料：羊毛，棉季节：秋天

我的结果是产品1（有材料和正确的季节）和产品2（有1种材料和正确的季节）。

我用连接尝试了这个

SELECT DISTINCT(shop_product.product_number), `shop_product`.`color_count`, `shop_product`.`category_id`, `shop_product`.`in_stock`, `shop_product`.`url_image`, `shop_product_description`.* FROM (`shop_product`) JOIN `shop_product_description` ON `shop_product`.`id` = `shop_product_description`.`product_id` JOIN `shop_category_description` ON `shop_product`.`category_id` = `shop_category_description`.`category_id` INNER JOIN `shop_filters` ON `shop_product`.`id` = `shop_filters`.`product_id` WHERE `shop_product`.`status` = 1 AND `shop_product_description`.`language_id` = '1' AND `shop_category_description`.`language_id` = '1' AND ( (shop_filters.type = '1' AND shop_filters.keyword = 'cotton') OR (shop_filters.type = '1' AND shop_filters.keyword = 'wool') ) AND (shop_filters.type = '2' AND shop_filters.keyword = 'fall') ORDER BY shop_product`.`url_image` asc, `shop_product_description`.`name` desc LIMIT 36

我使用Distinct获得1件产品（因为产品1有两种材料）。

但是在我改变之前我没有得到任何结果

( (shop_filters.type = '1' AND shop_filters.keyword = 'cotton') OR (shop_filters.type = '1' AND shop_filters.keyword = 'wool') ) AND (shop_filters.type = '2' AND shop_filters.keyword = 'fall')

到

( (shop_filters.type = '1' AND shop_filters.keyword = 'cotton') OR (shop_filters.type = '1' AND shop_filters.keyword = 'wool') ) OR (shop_filters.type = '2' AND shop_filters.keyword = 'fall')

然而，我的结果是棉花或羊毛的产品或跌落。如果有人有建议，那么请想点......

Answer 1

您需要多次匹配过滤器表，以检查每个过滤器。它最容易做多个连接。

SELECT DISTINCT(shop_product.product_number), shop_product.color_count, shop_product.category_id, shop_product.in_stock, shop_product.url_image, shop_product_description.* 
FROM (shop_product) 
JOIN shop_product_description ON shop_product.id = shop_product_description.product_id 
JOIN shop_category_description ON shop_product.category_id = shop_category_description.category_id 
INNER JOIN shop_filters sf1 ON shop_product.id = sf1.product_id 
INNER JOIN shop_filters sf2 ON shop_product.id = sf2.product_id 
WHERE shop_product.status = 1 AND shop_product_description.language_id = '1' 
AND shop_category_description.language_id = '1' 
AND ( (sf1.type = '1' AND shop_filters.sf1 = 'cotton') OR (sf1.type = '1' AND sf1.keyword = 'wool') ) 
AND (sf2.type = '2' AND sf2.keyword = 'fall') 
ORDER BY shop_product.url_image asc, shop_product_description.name desc LIMIT 36

网店过滤器返回的行不正确

1 个答案: