sending post request to devise registrations using json

Question

I want to use create a user account using postman, rails 5, and the devise gem. I added a username field to the devise user model and confirmed that it is working fine. However, when I send a post request to the Rails API, it is not creating the user as expected. Here is how the process goes through:

I'm sending this JSON post request to the URL: http://0.0.0.0:3000/users/

{
    "username": "username",
    "email": "[email protected]",
    "password": "password",
    "password_confirmation": "password"
}

Upon sending this request, I get the following response:

{
    "status": "ERROR",
    "message": "Could not create new user account",
    "data": {
        "email": [
            "can't be blank"
        ],
        "password": [
            "can't be blank"
        ]
    }
}

I created another Registrations Controller which inherits from Devise::RegistrationController. Here it is:

  1 module Api
  2   module V1
  3     class RegistrationsController < Devise::RegistrationsController
  4 
  5       before_action :configure_permitted_parameters
  6       respond_to :json

  7       def new
  8         user = User.new(user_params)
  9       end
 10 
 11       def create
 12            user = User.create(username: params[:username], 
 13                         email: params[:email], 
 14                         password: params[:password],
 15                         password_confirmation: params[:password_confirmation])
 16      
 17         if user.save 
 18           render json: {status: "SUCCESS", message: "Created new user account", data: user }, status: :ok
 19         else 
 20           render json: {status: "ERROR", 
 21                         message: "Could not create new user account", 
 22                         data: user.errors}, 
 23                         status: :unprocessable_entity
 24  
 25         end
 26       end
 27       
 28       private 
 29       
 30       def user_params
 31         params.require(:user).permit(:username, :email, :password, :password_confirmation)
 32       end
 33 
 34       protected
 35 
 36       def configure_permitted_parameters
 37         devise_parameter_sanitizer.permit(:sign_up, keys: [:username])
 38       end
 39 
 40     end
 41   end
 42 end

Any idea why I'm getting this response, and how to fix it? I'm grabbing the email and password from the params hash and passing it into the create function. I don't know why the response I'm getting states that it's empty

Answer 1

You should format your parameters nested under "user" e.g.:

{  
"user": {
    "username": "username",
    "email": "[email protected]",
    "password": "password",
    "password_confirmation": "password"
  }
}

as seen on this answer