WIP: Update the parent table to hold a reference to a language

Update the data uploader script to read the language from the csv and update the language information for any parent items that already exist (or create database entries if none already exist)

app/models/housing.rb

@@ -0,0 +1,19 @@
+class Housing < ApplicationRecord
+  has_many :parents, dependent: :nullify
+
+  def self.to_designation(housing)
+    return "Unknown" if housing.blank?
+
+    housing = housing
+    case housing
+    in /^1$/i
+      "Own"
+    in /^2$/i
+      "Rent"
+    in /^99$|^100$/i
+      "Unknown"
+    else
+      "Unknown"
+    end
+  end
+end

app/models/language.rb

@@ -0,0 +1,30 @@
+class Language < ApplicationRecord
+  scope :by_designation, -> { all.map { |language| [language.designation, language] }.to_h }
+  has_many :parents, dependent: :nullify
+
+  include FriendlyId
+
+  friendly_id :designation, use: [:slugged]
+  def self.to_designation(language)
+    return "Unknown" if language.blank?
+
+    case language
+    in /^1$|^1[^0]/i
+      "English"
+    in /^2$/i
+      "Portuguese"
+    in /^3$/i
+      "Spanish"
+    in /^99$|^100$/i
+      "Unknown"
+    else
+      puts "************************************"
+      puts "********      ERROR       **********"
+      puts ""
+      puts "Error parsing Language column. '#{language}' is not a known value. Halting execution"
+      puts ""
+      puts "************************************"
+      exit
+    end
+  end
+end

app/models/parent.rb

@@ -1,2 +1,4 @@
 class Parent < ApplicationRecord
+  belongs_to :language, optional: true
+  belongs_to :housing, optional: true
 end

app/models/survey_item_response.rb

@@ -51,6 +51,10 @@ class SurveyItemResponse < ActiveRecord::Base
     ).where("student_races.race_id": race.id).group(:survey_item).having("count(*) >= 10").average(:likert_score)
   }
 
+  scope :averages_for_language, lambda { |survey_items, school, academic_year, language|
+    SurveyItemResponse.where(survey_item: survey_items, school:,
+                             academic_year:, language:, grade: school.grades(academic_year:)).group(:survey_item).having("count(*) >= 10").average(:likert_score)
+  }
   def self.grouped_responses(school:, academic_year:)
     @grouped_responses ||= Hash.new do |memo, (school, academic_year)|
       memo[[school, academic_year]] =