Laravel / Postgres数据库查询？

Question

我对Laravel / Postgres DB Queries的查询有（奇怪）问题。 我将在此处粘贴整个查询（虽然有点太长，但我们只关注其中一部分）：

select distinct "products".*, "brands"."name" as "brand", "brands"."image" as "brand_image", "product_categories"."name" as "category", "product_categories"."slug" as "category_slug", count(distinct product_features.feature_category_id) as features_count from "products" inner join "brands" on "products"."brand_id" = "brands"."id" inner join "product_categories" on "products"."category_id" = "product_categories"."id" left join "product_features" on "products"."id" = "product_features"."product_id" where "products"."deleted_at" is null and "products"."category_id" in (142) and "products"."published" = true and "brands"."published" = true and "product_categories"."published" = true and "product_categories"."deleted_at" is null and "price" >= 0 and "price" <= 19000 and "products"."brand_id" in (17) and 
            (product_features.feature_category_id = 555 and
            CAST(product_features.value AS BOOLEAN) = true and
            product_features.deleted_at IS NULL) or
            (product_features.feature_category_id = 554 and
            CAST(product_features.value AS BOOLEAN) = true and
            product_features.deleted_at IS NULL) group by "products"."id", "brands"."name", "brands"."image", "product_categories"."name", "product_categories"."slug" having count(distinct product_features.feature_category_id) = 2 order by price asc

这是初始查询，但是当我执行它时，出现奇怪的错误：

ERROR:  invalid input syntax for type boolean: "800"

我不知道为什么会引发此错误？

Answer 1

您的product_features.value是一个文本字段。 虽然Postgres可以将所有非零整数（例如800强制转换为boolean true ，但不能将'800'这样'800' text强制转换为boolean 。

解决方案是将空和/或相等性上'0' product_features.value检查为'0'而不是CAST(product_features.value AS BOOLEAN) = true 。