Make LIKE searches case-insensitive also on PgSQL

app/controllers/todos_controller.rb

@@ -766,7 +766,7 @@ class TodosController < ApplicationController
 
   def get_not_completed_for_predecessor(relation, todo_id=nil)
     items = relation.todos.not_completed.
-      where('(LOWER(todos.description) LIKE ?)', "%#{params[:term].downcase}%")
+      where('(LOWER(todos.description) ' + Common.like_operator + '?)', "%#{params[:term].downcase}%")
     items = items.where("AND NOT(todos.id=?)", todo_id) unless todo_id.nil?
 
     items.

app/models/context.rb

@@ -7,7 +7,7 @@ class Context < ApplicationRecord
   scope :active,    -> { where state: :active }
   scope :hidden,    -> { where state: :hidden }
   scope :closed,    -> { where state: :closed }
-  scope :with_name, lambda { |name| where("name LIKE ?", name) }
+  scope :with_name, lambda { |name| where("name " + Common.like_operator + " ?", name) }
 
   acts_as_list :scope => :user, :top_of_list => 0
 

app/models/note.rb

@@ -2,5 +2,5 @@ class Note < ApplicationRecord
   belongs_to :user
   belongs_to :project
 
-  scope :with_body, lambda { |terms| where("body LIKE ?", terms) }
+  scope :with_body, lambda { |terms| where("body " + Common.like_operator + " ?", terms) }
 end

app/models/project.rb

@@ -11,8 +11,8 @@ class Project < ApplicationRecord
   scope :completed,   -> { where state: 'completed' }
   scope :uncompleted, -> { where("NOT(state = ?)", 'completed') }
 
-  scope :with_name_or_description, lambda { |body| where("name LIKE ? OR description LIKE ?", body, body) }
+  scope :with_name_or_description, lambda { |body| where("name " + Common.like_operator + " ? OR description " + Common.like_operator + " ?", body, body) }
-  scope :with_namepart, lambda { |body| where("name LIKE ?", body + '%') }
+  scope :with_namepart, lambda { |body| where("name " + Common.like_operator + " ?", body + '%') }
 
   before_create :set_last_reviewed_now
 

app/models/search/search_results.rb

@@ -27,14 +27,14 @@ module Search
 
     def incomplete_todos(terms)
       @user.todos.
-        where("(todos.description LIKE ? OR todos.notes LIKE ?) AND todos.completed_at IS NULL", terms, terms).
+        where("(todos.description " + Common.like_operator + " ? OR todos.notes " + Common.like_operator + " ?) AND todos.completed_at IS NULL", terms, terms).
         includes(Todo::DEFAULT_INCLUDES).
         reorder(Arel.sql("todos.due IS NULL, todos.due ASC, todos.created_at ASC"))
     end
 
     def complete_todos(terms)
       @user.todos.
-        where("(todos.description LIKE ? OR todos.notes LIKE ?) AND NOT (todos.completed_at IS NULL)", terms, terms).
+        where("(todos.description " + Common.like_operator + " ? OR todos.notes " + Common.like_operator + " ?) AND NOT (todos.completed_at IS NULL)", terms, terms).
         includes(Todo::DEFAULT_INCLUDES).
         reorder("todos.completed_at DESC")
     end
@@ -46,7 +46,7 @@ module Search
             "LEFT JOIN taggings ON tags.id = taggings.tag_id "+
             "LEFT JOIN todos ON taggings.taggable_id = todos.id "+
             "WHERE todos.user_id=? "+
-            "AND tags.name LIKE ? ", @user.id, terms])
+            "AND tags.name " + Common.like_operator + " ? ", @user.id, terms])
     end
 
   end

lib/common.rb

@@ -6,4 +6,14 @@ module Common
       @user_theme = SITE_CONFIG['default_theme'] || 'light_blue'
     end
   end
+
+  def self.like_operator
+    # This is something of a hack to use the correct operator for Pg
+    if ActiveRecord::Base.connection.adapter_name.downcase.to_sym == :postgresql
+      like = 'ILIKE'
+    else
+      like = 'LIKE'
+    end
+    return like
+  end
 end

test/controllers/search_controller_test.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 
 class SearchControllerTest < ActionController::TestCase
-  
+
   def setup
   end
 
@@ -10,12 +10,12 @@ class SearchControllerTest < ActionController::TestCase
     get :index
     assert_response 200
   end
-  
+
   def test_search_for_todo_with_tag
     login_as :admin_user
     post :results, params: { :search => "gates" }
     assert_response 200
     assert_equal 3, assigns['count'], "should have found 3 todos"
   end
-  
+
 end