Rails - Postgres - jsonb 列查询

Question

I have a jsonb column named 'available_quantity'.我有一个名为“available_quantity”的 jsonb 列。 which will have sample values这将有样本值

{ "100": 50, "1000":10 }

Now, I want to query all keys with values less than 50.现在，我想查询所有值小于 50 的键。

I tried this query,我试过这个查询，

Bundle.where('available_quantity @> ?', {'100': 5}.to_json)

But this one gives me all the Bundle with available_quantity containing {100: 5}.但是这个给了我所有包含 {100:5} 的可用数量的捆绑包。

How can I do that?我怎样才能做到这一点？ Is that even possible?这甚至可能吗？

Answer 1

You can use the ->> operator:您可以使用->>运算符：

Bundle.where("(available_quantity->>'100')::int < 50")