feat: create a parents by language graph

Update demographics table with lanugage options

Create a lanugage table to hold the new languages

Update the demographic loader to input languages into the database

Update the cleaner to read the language column

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)

update the analyze interface to add controls for selecting ‘parents by group’ and a dropdown for ‘parent by language’

Update the analyze controller to read the parent-by-group parameter

Create a graph for the parent-by-group view

Bubble up averages for language calculations.

Make sure n-size only counts responses for a given measure.

db/migrate/20250408212201_add_housing_to_parent.rb

@@ -0,0 +1,5 @@
+class AddHousingToParent < ActiveRecord::Migration[8.0]
+  def change
+    add_reference :parents, :housing, foreign_key: true
+  end
+end

db/migrate/20250411213850_create_languages.rb

@@ -0,0 +1,10 @@
+class CreateLanguages < ActiveRecord::Migration[8.0]
+  def change
+    create_table :languages do |t|
+      t.string :designation
+      t.string :slug
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20250418184427_create_parent_languages.rb

@@ -0,0 +1,12 @@
+class CreateParentLanguages < ActiveRecord::Migration[8.0]
+  def change
+    create_table :parent_languages do |t|
+      t.references :parent, null: false, foreign_key: true
+      t.references :language, null: false, foreign_key: true
+
+      t.timestamps
+    end
+
+    add_index :parent_languages, %i[parent_id language_id]
+  end
+end

db/migrate/20250418185032_add_designation_index_to_language.rb

@@ -0,0 +1,5 @@
+class AddDesignationIndexToLanguage < ActiveRecord::Migration[8.0]
+  def change
+    add_index :languages, %i[designation]
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_03_27_205800) do
+ActiveRecord::Schema[8.0].define(version: 2025_04_18_185655) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -102,6 +102,14 @@ ActiveRecord::Schema[8.0].define(version: 2025_03_27_205800) do
     t.index ["slug"], name: "index_incomes_on_slug", unique: true
   end
 
+  create_table "languages", force: :cascade do |t|
+    t.string "designation"
+    t.string "slug"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["designation"], name: "index_languages_on_designation"
+  end
+
   create_table "legacy_attempts", id: :serial, force: :cascade do |t|
     t.integer "recipient_id"
     t.integer "schedule_id"
@@ -322,11 +330,23 @@ ActiveRecord::Schema[8.0].define(version: 2025_03_27_205800) do
     t.index ["subcategory_id"], name: "index_measures_on_subcategory_id"
   end
 
+  create_table "parent_languages", force: :cascade do |t|
+    t.bigint "parent_id", null: false
+    t.bigint "language_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["language_id"], name: "index_parent_languages_on_language_id"
+    t.index ["parent_id", "language_id"], name: "index_parent_languages_on_parent_id_and_language_id"
+    t.index ["parent_id"], name: "index_parent_languages_on_parent_id"
+  end
+
   create_table "parents", force: :cascade do |t|
     t.string "response_id"
     t.integer "number_of_children"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.bigint "housing_id"
+    t.index ["housing_id"], name: "index_parents_on_housing_id"
   end
 
   create_table "races", force: :cascade do |t|
@@ -514,6 +534,9 @@ ActiveRecord::Schema[8.0].define(version: 2025_03_27_205800) do
   add_foreign_key "legacy_school_categories", "legacy_categories", column: "category_id"
   add_foreign_key "legacy_school_categories", "legacy_schools", column: "school_id"
   add_foreign_key "measures", "subcategories"
+  add_foreign_key "parent_languages", "languages"
+  add_foreign_key "parent_languages", "parents"
+  add_foreign_key "parents", "housings"
   add_foreign_key "respondents", "academic_years"
   add_foreign_key "respondents", "schools"
   add_foreign_key "response_rates", "academic_years"