ActiveRecord::ReadOnlyRecord while updating object fetched by joins

ActiveRecord find with join options retrieves object as readonly.station = Station.find( :first, :joins => :call, :conditions => ["customer_id = ? and date(insurance_expiry_date) = ?", customer.id, insurance_expiry_date ] )Readonly object cannot modified. station.update_attributes({ :customer_id => 12 })should raise following error.ActiveRecord::ReadOnlyRecordIf you wanted to do write on object then you need to pass following option to find query.:readonly … Continue reading ActiveRecord::ReadOnlyRecord while updating object fetched by joins

Manual active record db connection in ruby using mysql adapter

Here is the code to make manual connection with database require 'active_record'ActiveRecord::Base.establish_connection( :adapter => "mysql", :host => "localhost", :username => "root", :password => "abcd", :database => "funonrails" )Load database configurations from yml file dbconfig = YAML::load(File.open('database.yml'))ActiveRecord::Base.establish_connection( dbconfig )

How to map irregular database tables with rails models

Rails specifies standard conventions while creating models, controllers, migrations ( database tables ).Conventions for creating database tables1. Table name should be plural2. id field must be primary_key for table.3. foreign_key  must be like <model_name>_id i.e. post_id, site_idConventions for creating models & Controllers1. Model name must be singular and controller name should be plural.Although rails have … Continue reading How to map irregular database tables with rails models