创建DSL以查询类似于ActiveRecord的postgres json，其中

Question

In ActiveRecord we can do where(my_attribute: value) for an attribute in a column.

That's not possible yet with attributes defined in a json column, instead it would look like this:

where("document->>'my_attribute' = ?", value)

If we assume that my model only has one json column, document , would it be possible to create a custom chainable query for that column looking something like this:

dwhere(my_attribute: value)

Answer 1

This is the closest I've come up with:

scope :dwhere, -> (key, value) { where("document ->> '#{key}' = '?'", value) }

To use like this:

MyModel.dwhere(key, value)