ArgumentError (wrong number of arguments (3 for 0..1)):

Question

This is my model:

class User < ActiveRecord::Base
has_many :appointments
has_many :doctors, :through => :appointments
end

class Doctor < ActiveRecord::Base
has_many :appointments
has_many :users, :through => :appointments
end

class Appointment < ActiveRecord::Base
belongs_to :doctor
belongs_to :user
end

Code to call controller action:

$.ajax({
      type: "POST",
      url: "/create",
      data: {
        appointment_date: date,
        doctor_id: "1",
        user_id: "1"
      }

// Etc. });

Action:

def create
@appointment = Appointment.new(:appointment_date, :doctor_id, :user_id)
if @appointment.save
    flash[:success] = "Welcome!"
    redirect_to @user
else
    alert("failure!")
end

And I got this error:

ArgumentError (wrong number of arguments (3 for 0..1)):

How to handle this error? Any advice? Thanks.

Answer 1

Simply passing the symbols to the Appointment constructor doesn't work.

You need to pass the variables like this:

Appointment.new(:appointment_date => params[:appointment_date], ...)

Since the params hash already contains all these values, you can pass these in directly like zwippie already showed.

Just a headsup for the future: in case your params hash contains values you don't want to pass to the constructor, use Appointment.new(params.except(:unwanted_key))

Answer 2

What if you try:

@appointment = Appointment.new(params[:data])