Attach Mefs to SchoolYears (#1075)

Closes #1064 

- [x] New relationship
- [x] Migration + new ref

app/models/mef.rb

@@ -3,6 +3,8 @@
 class Mef < ApplicationRecord
   enum :ministry, %i[menj masa armee mer]
 
+  belongs_to :school_year
+
   scope :with_wages, -> { joins("JOIN wages ON wages.mef_codes ? mefs.code") }
 
   validates :label, :code, :short, :mefstat11, :ministry, presence: true

db/mef_seeder.rb

@@ -26,7 +26,7 @@ def self.seed
         end
       end
 
-      attributes
+      attributes.merge("school_year_id" => SchoolYear.current.id)
     end
 
     Mef.upsert_all(mefs, unique_by: :code) # rubocop:disable Rails/SkipsModelValidations

db/migrate/20240814133039_add_school_year_to_mef.rb

@@ -0,0 +1,20 @@
+class AddSchoolYearToMef < ActiveRecord::Migration[7.2]
+  def up
+    add_reference :mefs, :school_year, foreign_key: true
+
+    current_school_year = SchoolYear.current
+
+    if current_school_year
+      execute <<-SQL
+        UPDATE mefs
+        SET school_year_id = #{current_school_year.id}
+      SQL
+    else
+      puts "Warning: No current SchoolYear found. Mef records were not updated."
+    end
+  end
+
+  def down
+    remove_reference :mefs, :school_year
+  end
+end

spec/factories/mefs.rb

@@ -7,6 +7,7 @@
     short { "1ERE COLLAGE DE GOMETTES" }
     mefstat11 { Faker::Number.number(digits: 11) }
     ministry { Mef.ministries[:menj] }
+    school_year { SchoolYear.current }
 
     transient do
       daily_rate { 1 }