Rails 5.2 API - Returning enum value in JSON

问题

I currently have a postgres enum type setup in my user columns as roles. It works as intended like so.

Example:

class User < ApplicationRecord
  enum role: { admin: "Admin", viewer: "Viewer" } 
end

And the JSON response returns it as:

{
  "id": 1,
  "role": "admin"
}

However, the role attribute is returning the key instead of the enum value. Is there a solution for this?

回答1:

Give this a try

def as_json(options = {})
  super.tap do |hash|
    hash['role'] = User::roles[role]
  end
end

回答2:

I'd do this way. In User model file

def role_id
  User.roles[self.role]
end

and then you role_id method

来源：https://stackoverflow.com/questions/55185267/rails-5-2-api-returning-enum-value-in-json