My First Rails App

Posted by peacestone on April 5, 2017

Building my first rails app was awesome. It helped me put together everything I had learned throughout the rails course. I especially became comfortable using form_for helper and fields_for helper for the complex form I built, and learned how to customize the devise gem.

Some of the lessons I learned:

If you need rails to generate a field_with_errors div for the nested part of the form, you must add accepts_nested_attributes_for :model macro. It took me a while to figure this out because I was using a custom attribute writer to accept the nested attributes. After I added that macro, it created those error divs. Here is what my model looks like:

# appointment model

class Recipe < ApplicationRecord

has_many :ingredients

  accepts_nested_attributes_for :ingredients

 def ingredient_attributes=(attributes)
    self.ingredients = Ingredient.find_or_initialize_by(attributes)

I also used the devise gem for my app. It was a challenge to customize it for my web app, but was worth it. I needed to add attributes to my user model and I learned how to customize devise to allow more attributes. All I needed to do was sanitize the attributes in order to update your user model.

Here is how I did it: I added a before_action filter to my application controller called :configure_permitted_parameters, if: :devise_controller?. Then I added the protected method, and created a method configure_permitted_parameters. Here is what it looks like:


  def configure_permitted_parameters
    added_attrs = [:attribute1, :attribute2, :attribute3, :attribute4]
    devise_parameter_sanitizer.permit :sign_up, keys: added_attrs
    devise_parameter_sanitizer.permit :account_update, keys: added_attrs

Now my user model can accept other attributes. Check out my repo to see it yourself