Add migrations for AP-427

Author: yzhoubk

db/migrate/20250930215317_add_two_facets.rb

@@ -0,0 +1,12 @@
+class AddTwoFacets < ActiveRecord::Migration[7.0]
+  def up
+    facet = Facet.find_by!(name: "Medium")
+    Term.create!(facet: facet, value: "Digital")
+    Term.create!(facet: facet, value: "Drawing")
+  end
+
+  def down
+    facet = Facet.find_by(name: "Medium")
+    Term.where(facet: facet, value: ["Digital", "Drawing"]).delete_all
+  end
+end

db/migrate/20250930220140_add_three_ordered_terms.rb

@@ -0,0 +1,29 @@
+class AddThreeOrderedTerms < ActiveRecord::Migration[7.0]
+  def up
+    facet = Facet.find_by!(name: "Decade")
+
+    # Add and remove terms from facet "Decade", and reorder them.
+    # The term "After 1999" is no longer needed and will be removed 
+    # when all items_terms have been updated
+    term  = Term.find_by!(facet: facet, value: "After 1999")
+    term.update!(ord: 15)
+    term  = Term.find_by!(facet: facet, value: "No Date")
+    term.update!(ord: 14)
+     
+    Term.create!(facet: facet, value: "2000-2009", ord: 11)
+    Term.create!(facet: facet, value: "2010-2019", ord: 12)
+    Term.create!(facet: facet, value: "After 2020",ord: 13)
+  end
+
+  def down
+    facet = Facet.find_by(name: "Decade")
+    return unless facet
+
+    Term.where(facet: facet, value: ["2000-2009", "2010-2019", "After 2020"]).delete_all
+    term  = Term.find_by!(facet: facet, value: "After 1999")
+    term.update!(ord: 11)
+    term  = Term.find_by!(facet: facet, value: "No Date")
+    term.update!(ord: 12)
+  end
+end
+

db/migrate/20250930220504_update_term_item_relation.rb

@@ -0,0 +1,52 @@
+class UpdateTermItemRelation < ActiveRecord::Migration[7.0]
+  def up
+    facet = Facet.find_by!(name: 'Decade')
+    old_term = Term.find_by!(facet: facet, value: 'After 1999')
+    
+    new_terms = {
+      (2000..2009) => Term.find_by!(facet: facet, value: '2000-2009'),
+      (2010..2019) => Term.find_by!(facet: facet, value: '2010-2019'),
+      (2020..)     => Term.find_by!(facet: facet, value: 'After 2020')
+    }
+
+    old_term.items.find_each do |item|
+      year = integer_year(item.date)
+      next unless year
+
+      target_term = new_terms.find { |range, _| range.cover?(year) }&.last
+      next unless target_term
+        
+      update_item(item, old_term, target_term)  
+    end    
+  end
+
+  def down
+    facet = Facet.find_by!(name: 'Decade')
+    target_term = Term.find_by!(facet: facet, value: 'After 1999')
+    roll_back(facet, target_term, '2000-2009')
+    roll_back(facet, target_term, '2010-2019')
+    roll_back(facet, target_term, 'After 2020')
+  end
+
+  private
+  
+  def integer_year(val)
+    Integer(val)
+  rescue ArgumentError, TypeError
+    nil
+  end
+
+  def update_item(item, origin_term, target_term)
+    return unless target_term & item & target_term
+
+    item.terms.delete(origin_term)
+    item.terms << target_term unless item.terms.include?(target_term)
+  end
+
+  def roll_back(facet, target_term, origin_term_value)
+    origin_term = Term.find_by!(facet: facet, value: origin_term_value)
+    origin_term.items.find_each do |item|
+      update_item(item, origin_term, target_term)
+    end
+  end
+end

db/migrate/20250930230620_update_fix_term_item_relation.rb

@@ -0,0 +1,46 @@
+class UpdateFixTermItemRelation < ActiveRecord::Migration[7.0]
+  def up
+    execute <<~SQL.squish
+      old_id = select_value("SELECT id FROM terms WHERE value = 'After 1999'")
+      new_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
+      return unless old_id && new_id
+
+      WITH target AS (
+        SELECT it.term_id, it.item_id
+        FROM items i
+        JOIN items_terms it ON i.id = it.item_id
+        JOIN terms t ON it.term_id = t.id
+        WHERE t.id = #{old_id}
+          AND i.date = '[2020]'
+      )
+      UPDATE items_terms it
+      SET term_id = #{new_id}
+      FROM target
+      WHERE it.item_id = target.item_id
+      AND it.term_id = target.term_id;
+    SQL
+  end
+
+  def up
+     new_id = select_value("SELECT id FROM terms WHERE value = 'After 1999'")
+     old_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
+      return unless old_id && new_id
+
+    execute <<~SQL.squish
+      WITH target AS (
+        SELECT it.term_id, it.item_id
+        FROM items i
+        JOIN items_terms it ON i.id = it.item_id
+        JOIN terms t ON it.term_id = t.id
+        WHERE t.id = #{old_id}
+          AND i.date = '[2020]'
+      )
+      UPDATE items_terms it
+      SET term_id = #{new_id}
+      FROM target
+      WHERE it.item_id = target.item_id
+      AND it.term_id = target.term_id;
+    SQL
+  end
+
+end