Default ActiveRecord Associations in Rails 4 - ruby-on-rails

Question

I'm trying to implement a persitent model Setting storage in Rails, using the Active Record. I've already saw other gems like ledermann/rails-settings, but I don't want other dependency, because I'll use it only for one model and need the ability to customize it.
I've created 3 models, "Company", "Setting", "CompanySetting". For the association, I done the follow:
company.rb
has_many :company_settings
setting.rb
has_many :company_settings
has_many :company, through: :company_settings
company_setting.rb
belongs_to :company
belongs_to :setting
But I've a problem, for example, I seed the Settings table with N settings, and I need to have these Settings built when I try to access the Company settings, since they don't have an CompanySetting entry for that Setting.
My attempt was the follow:
company.rb
has_many :company_settings
accepts_nested_attributes_for :company_settings
def load_company_settings
Setting.all.collect { |setting|
company_settings.find_by( setting: setting ) || company_settings.build( { setting: setting, value: '' } )
}
end
And then, in my form (using Simple Form):
= f.simple_fields_for :company_settings, #company.load_company_settings do |s|
= s.input :value
It renders the correctly number of fields (the N fields in my Setting table), and return they values if exist, otherwise, returns an empty string as value. But when I do a POST, it doesn't saves.
I believe that I'm doing the right thing in Rails 4 Strong Params, so, my companies_controller look like that:
class Company::CompaniesController < Company::BaseController
def show
#company = current_company
end
def edit
#company = current_company
end
def update
#company = current_company
if #company.update(company_params)
redirect_to company_path
else
render 'edit'
end
end
private
def company_params
params.require(:company).permit(:name, company_settings_attributes: [:id, :value, :setting])
end
end
Table Structure - Company:
id
Table Structure - Setting:
title (value to show to user)
key (value used in application)
Table Structure - CompanySetting:
company_id
setting_id
value
Thanks (:

Answer 1

I fixed that, with these steps:
.1 Customize the Model adding the methods for return the list of all possible settings from Setting model, and build new ones with CompanySetting. You need to create an assign method in the class, because when the Strong Params try to save, it will try to find this method.
def settings
Setting.all.collect { |setting|
company_settings.find_by( setting: setting ) || company_settings.build( { setting: setting, value: '' } )
}
end
def set_setting(key, value)
company_settings.find_or_create_by( setting: Setting.find_by(key: key) ).update(value: value)
end
def settings=(attributes)
attributes.map { |key, value|
set_setting(key, value)
}
end
asd
.2 Update the Form to use this new method (Here I added two types of fields, booleans and not booleans. This is based on is_boolean property in Setting
= f.simple_fields_for :settings do |s|
- for setting in #company.settings
.form-group
- if setting.setting.is_boolean
.checkbox
%label
= s.input_field setting.setting.key.to_sym, as: :boolean, boolean_style: :inline, checked: setting.value == "1"
= setting.setting.title
%span.help-block= setting.setting.description
- else
= s.label setting.setting.key.to_sym, setting.setting.title, class: 'control-label'
= s.input_field setting.setting.key.to_sym, class: 'form-control', value: setting.value
%span.help-block= setting.setting.description
.3 Fix your Strong Params
def company_params
params.require(:company).permit(:name,
settings: [
:setting_key_1,
:setting_key_2,
...,
:my_other_n_setting
]
)
end
Done.