const FormDataObjectizer = require("form-data-objectizer")
const formData = new FormData()

formData.append("model_search[global]", "0")
formData.append("model_search[model_search_group_attributes][group_mode]", "and")
formData.append("model_search[model_search_group_attributes][model_search_rules_attributes][700865670245722100][rule_attribute]", "id")

const object = FormDataObjectizer.toObject(formData)

expect(object).toEqual({
  model_search: {
    global: "0",
    model_search_group_attributes: {
      group_mode: "and",
      model_search_rules_attributes: {
        700865670245722100: {
          rule_attribute: "id"
        }
      }
    }
  }
})

Security

Form keys containing __proto__, constructor, or prototype as an exact path segment are rejected to prevent prototype pollution. For example, __proto__[polluted] and constructor[prototype][polluted] throw an error instead of walking into inherited object prototypes.