Make all LIKE queries case insensitive (#2402)

app/models/user.rb

@@ -54,6 +54,7 @@ class User < ApplicationRecord
 
   class << self
     include AuthValues
+    include Queries
 
     # Generates a user from omniauth.
     def from_omniauth(auth)
@@ -69,48 +70,46 @@ class User < ApplicationRecord
         u.save!
       end
     end
-  end
 
-  def self.admins_search(string)
-    return all if string.blank?
+    def admins_search(string)
+      return all if string.blank?
 
-    active_database = Rails.configuration.database_configuration[Rails.env]["adapter"]
-    # Postgres requires created_at to be cast to a string
-    created_at_query = if active_database == "postgresql"
-      "created_at::text"
-    else
-      "created_at"
+      like = like_text # Get the correct like clause to use based on db adapter
+
+      search_query = "users.name #{like} :search OR email #{like} :search OR username #{like} :search" \
+                    " OR users.#{created_at_text} #{like} :search OR users.provider #{like} :search" \
+                    " OR roles.name #{like} :search"
+
+      search_param = "%#{sanitize_sql_like(string)}%"
+      where(search_query, search: search_param)
     end
 
-    search_query = "users.name LIKE :search OR email LIKE :search OR username LIKE :search" \
-                  " OR users.#{created_at_query} LIKE :search OR users.provider LIKE :search" \
-                  " OR roles.name LIKE :search"
+    def admins_order(column, direction)
+      # Arel.sql to avoid sql injection
+      order(Arel.sql("users.#{column} #{direction}"))
+    end
 
-    search_param = "%#{sanitize_sql_like(string)}%"
-    where(search_query, search: search_param)
-  end
+    def shared_list_search(string)
+      return all if string.blank?
 
-  def self.admins_order(column, direction)
-    # Arel.sql to avoid sql injection
-    order(Arel.sql("users.#{column} #{direction}"))
-  end
+      like = like_text # Get the correct like clause to use based on db adapter
 
-  def self.shared_list_search(string)
-    return all if string.blank?
+      search_query = "users.name #{like} :search OR users.uid #{like} :search"
 
-    search_query = "users.name LIKE :search OR users.uid LIKE :search"
+      search_param = "%#{sanitize_sql_like(string)}%"
+      where(search_query, search: search_param)
+    end
 
-    search_param = "%#{sanitize_sql_like(string)}%"
-    where(search_query, search: search_param)
-  end
+    def merge_list_search(string)
+      return all if string.blank?
 
-  def self.merge_list_search(string)
-    return all if string.blank?
+      like = like_text # Get the correct like clause to use based on db adapter
 
-    search_query = "users.name LIKE :search OR users.email LIKE :search"
+      search_query = "users.name #{like} :search OR users.email #{like} :search"
 
-    search_param = "%#{sanitize_sql_like(string)}%"
-    where(search_query, search: search_param)
+      search_param = "%#{sanitize_sql_like(string)}%"
+      where(search_query, search: search_param)
+    end
   end
 
   # Returns a list of rooms ordered by last session (with nil rooms last)