Below code works on Rails-2 application but its not work in Rails-3 upgrade:
In user.rb model:
has_many :auction_lots, :class_name => "Auction::Lot", :order => "position"
In lot.rb model:
class Auction::Lot < ActiveRecord::Base
include ActionController::UrlWriter
belongs_to :user
scope :unplanned, :conditions => "status < #{STATUS[:in_stock]}"
end
ActionView::Template::Error (uninitialized constant User::AuctionLot):
150: <% unless current_user.auction_lots.unplanned.empty? %>
activerecord (3.2.13) lib/active_record/inheritance.rb:111:in `compute_type'
activerecord (3.2.13) lib/active_record/reflection.rb:172:in `klass'
activerecord (3.2.13) lib/active_record/associations/association.rb:117:in `klass'
activerecord (3.2.13) lib/active_record/associations/collection_proxy.rb:86:in `method_missing'
Please explain anyone. What is the problem between rails-2 and rails-3
Urlwriter is not included as per Rails-3.
Its correct way to incude "include Rails.application.routes.url_helpers".
It works for me.
Related
I have a reference to a Model object called Admin which has a field called id. The object property is accessible in the puts line. I now need to pass in that ID into an ActiveRecord call to create another object (where it serves as foreign key) as follows but it throws an exception copied below (the admin.id does not get picked up in the Bill.create call):
admin = Admin.find_by(email:email)
puts "admin id #{admin.id}" # this gets printed with correct value
bill = Bill.create(admin_id: admin.id, body: body)
Exception:
/usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/attribute_assignment.rb:59:in `rescue in _assign_attribute': unknown attribute 'admin_id' for Bill. (ActiveRecord::UnknownAttributeError)
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/attribute_assignment.rb:54:in `_assign_attribute'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/attribute_assignment.rb:41:in `block in assign_attributes'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/attribute_assignment.rb:35:in `each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/attribute_assignment.rb:35:in `assign_attributes'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/core.rb:564:in `init_attributes'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/core.rb:281:in `initialize'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/inheritance.rb:61:in `new'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/inheritance.rb:61:in `new'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activerecord-4.2.4/lib/active_record/persistence.rb:33:in `create'
from test.rb:34:in `<main>'
ActiveRecord migration for the Bills model:
def up
create_table :bills do |t|
t.integer :admin_id
t.text :body
end
add_foreign_key :bills, :admins
end
Thank you in advance for sharing insights on what I am doing wrong.
Per my comment, you should really make this into a belongs_to relation, here's the refactored migration (using latest Rails 4 syntax):
class CreateBills < ActiveRecord::Migration
def change
create_table :bills do |t|
t.references :admin
t.text :body
end
end
end
add these relations to the models:
class Admin < ActiveRecord::Base
has_many :bills
end
class Bill < ActiveRecord::Base
belongs_to :admin
end
and the code for creating a bill associated with an admin:
admin = Admin.find_by(email:email)
puts "admin id #{admin.id}" # this gets printed with correct value
bill = admin.bills.create(body: body)
ArgumentError: wrong number of arguments (1 for 0)
from /Users/Castillo/Desktop/gainer/app/models/status.rb:13:in `update_remaining_nutrients'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:507:in `block in callback'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:504:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:504:in `callback'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:352:in `add_to_target'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:495:in `block in concat_records'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:493:in `each'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:493:in `concat_records'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:134:in `block in concat'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:149:in `block in transaction'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/transactions.rb:208:in `transaction'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:148:in `transaction'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:134:in `concat'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.11/lib/active_record/associations/collection_proxy.rb:116:in `<<'
from /Users/Castillo/Desktop/gainer/app/models/user.rb:65:in `eat'
from (irb):31
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands/console.rb:8:in `start'
from /usr/local/rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.11/lib/rails/commands.rb:41:in `<top (required)>'
I want to call the update_remaining_nutrients method on status.rb whenever a meal is "eaten" by the user. When I call User.first.eat(Meal.first) I get the ArgumentError. Not sure why because I'm not passing the after_add method any arguments?
user.rb
class User < ActiveRecord::Base
has_many :meals
has_many :statuses
def eat(meal)
statuses.last.meals<<meal
end
end
status.rb
class Status < ActiveRecord::Base
attr_accessible :remaining_calories, :remaining_carbs, :remaining_protein, :weight, :user_id
belongs_to :user
has_many :meals, after_add: :update_remaining_nutrients
after_save :update_users_weight , :if => Proc.new {|a| a.weight_changed?}
def update_users_weight
self.user.weight.update_attributes(weight: self.weight)
end
def update_remaining_nutrients
puts "It Works!!!!!"
end
end
meal.rb
class Meal < ActiveRecord::Base
attr_accessible :name, :description, :clean_up, :homemade, :prep_time, :user_id, :status_id
belongs_to :user
belongs_to :status
has_many :ingredient_meals
has_many :ingredients, :through => :ingredient_meals
end
If you have a look at the Association callbacks section of the docs, you'll see this example:
class Project
has_and_belongs_to_many :developers, after_add: :evaluate_velocity
def evaluate_velocity(developer)
...
end
end
That's not the has_many relationship that you have but it is close enough. If you look at the evaluate_velocity method, you'll see that the developer in question is passed as an argument by the :after_add callback. You're getting an ArgumentError about your update_remaining_nutrients being called with one argument when it doesn't want any and that matches what the the example suggests would happen.
Try this:
def update_remaining_nutrients(meal)
# Do interesting things with `meal` in here...
end
I'm struggling to make a join between tables work on a non-standard schema. I know the proper way of doing it would be migrating the schema and using the ActiveRecord convention but as long as I'm using this to consume data for testing purposes, that's not an option.
The join can be made using the key 'AGREEMENT_TYPE_ID' that exists in both tables.
I have the following in the models definition:
class Agreements < ActiveRecord::Base
self.table_name = 'AGREEMENTS'
self.primary_key = 'AGREEMENT_ID'
has_one :Agreement_Types, :foreign_key => 'AGREEMENT_TYPE_ID'
end
class Agreement_Types < ActiveRecord::Base
belongs_to :Agreements
self.table_name = 'AGREEMENT_TYPES'
self.primary_key = 'AGREEMENT_TYPE_ID'
end
This is the instantiation:
puts Agreements.joins(:Agreement_Types)
This is the output:
C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/inheritance.rb:111:in `compute_type': uninitialized constant Agreements
::AgreementTypes (NameError)
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/reflection.rb:172:in `klass'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency/join_association.rb:40:in `initialize'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:152:in `new'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:152:in `build_join_association'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:115:in `build'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:123:in `block in build'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:122:in `each'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:122:in `build'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/associations/join_dependency.rb:18:in `initialize'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation/query_methods.rb:358:in `new'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation/query_methods.rb:358:in `build_joins'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation/query_methods.rb:266:in `build_arel'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation/query_methods.rb:260:in `arel'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation.rb:171:in `exec_queries'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation.rb:160:in `block in to_a'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/explain.rb:25:in `logging_query_plan'
from C:/tools/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.2.7/lib/active_record/relation.rb:159:in `to_a'
from C:in `to_ary'
from prueba.rb:29:in `puts'
from prueba.rb:29:in `puts'
from prueba.rb:29:in `<main>'
I find a solution that works:
class AgreementType < ActiveRecord::Base
self.table_name = 'AGREEMENT_TYPES'
self.primary_key = 'AGREEMENT_TYPE_ID'
belongs_to :Agreement
end
class Agreement < ActiveRecord::Base
self.table_name = 'AGREEMENTS'
self.primary_key = 'AGREEMENT_ID'
has_one :AgreementType, :primary_key => 'AGREEMENT_TYPE_ID', :foreign_key => 'AGREEMENT_TYPE_ID'
end
I am building a rails engine. I have the following two model classes:
module LandingPageEng
class LandingPage < ActiveRecord::Base
attr_protected # just for debugging right now
has_many :slide_show_images, :dependent => :destroy
accepts_nested_attributes_for :slide_show_images, allow_destroy: true
end
end
The second class is:
module LandingPageEng
class SlideShowImage < ActiveRecord::Base
attr_accessible :image, :landing_page_id
belongs_to :landing_page
validates :image, :presence => true
end
end
The tables associated with them are landing_page_eng_landing_page and landing_page_eng_slide_show_image.
When I run the following in the console I get the error NameError: uninitialized constant SlideShowImage.
1.9.3-p194 :001 > LandingPageEng::LandingPage.new({"title"=>"wd", "tagline"=>"wed", "slide_show_images"=>{"_destroy"=>""}})
NameError: uninitialized constant SlideShowImage
from /Users/martinjlogan/.rvm/gems/ruby-1.9.3-p194/gems/activesupport- 3.2.6/lib/active_support/inflector/methods.rb:229:in `block in constantize'
from /Users/martinjlogan/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.6/lib/active_support/inflector/methods.rb:228:in `each'
from /Users/martinjlogan/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.6/lib/active_support/inflector/methods.rb:228:in `constantize'
from /Users/martinjlogan/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.6/lib/active_support/core_ext/string/inflections.rb:54:in `constantize'
<snip>
I have been banging my head on this and can't figure it out. Any help much appreciated.
I don't have a Rails 3 setup with engines to test this on quickly but I think the issue is with your has_many configuration; it's looking for a class that's named SlideShowImage but your class name is LandingPageEng::SlideShowImage.
I believe adding a :class_name option to your has_many will fix this.
http://railsapi.com/doc/rails-v3.0.8rc1/classes/ActiveRecord/Associations/ClassMethods.html#M004956
I encountered the following problem with MongoID.
I've created two models which related by one to many.
require 'mongoid'
class User
include Mongoid::Document
has_many :configs
field :login, :type => String, unique: true
field :password, :type => String
field :email, :type => String
end
class Config
include Mongoid::Document
belongs_to :user
field :links, :type => Array
field :root, :type => Array
field :objects, :type => Array
field :categories, :type => Array
end
After that I've created new User instance:
user = User.new
user.login = "login1"
user.password = "password1"
user.email = "email1"
user.save
But I saw the following output:
/home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/inflector/methods.rb:229: Use RbConfig instead of obsolete and deprecated Config.
/home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/referenced/many.rb:550:in `criteria': undefined method `where' for RbConfig:Module (NoMethodError)
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/metadata.rb:143:in `criteria'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/builders/referenced/many.rb:20:in `build'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/accessors.rb:43:in `create_relation'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/accessors.rb:26:in `build'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/accessors.rb:101:in `block (4 levels) in getter'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/threaded/lifecycle.rb:125:in `_loading'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/accessors.rb:100:in `block (3 levels) in getter'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/threaded/lifecycle.rb:84:in `_building'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/relations/accessors.rb:99:in `block (2 levels) in getter'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/validations.rb:51:in `read_attribute_for_validation'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validator.rb:151:in `block in validate'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validator.rb:150:in `each'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validator.rb:150:in `validate'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:310:in `_callback_before_1'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:407:in `_run__852778899__validate__1039643020__callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:405:in `__run_callback'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:385:in `_run_validate_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:81:in `run_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/callbacks.rb:43:in `run_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validations.rb:212:in `run_validations!'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validations/callbacks.rb:53:in `block in run_validations!'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:403:in `_run__852778899__validation__1039643020__callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:405:in `__run_callback'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:385:in `_run_validation_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activesupport-3.2.2/lib/active_support/callbacks.rb:81:in `run_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/callbacks.rb:43:in `run_callbacks'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validations/callbacks.rb:53:in `run_validations!'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validations.rb:179:in `valid?'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/validations.rb:75:in `valid?'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/activemodel-3.2.2/lib/active_model/validations.rb:187:in `invalid?'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence/insertion.rb:23:in `block in prepare'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence/insertion.rb:22:in `tap'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence/insertion.rb:22:in `prepare'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence/operations/insert.rb:26:in `persist'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence.rb:49:in `insert'
from /home/scepion1d/Workspace/RubyMine/dana-x/.bundle/ruby/1.9.1/gems/mongoid-2.4.6/lib/mongoid/persistence.rb:154:in `upsert'
from parser/parsing_starter.rb:47:in `<main>'
If I remove the lines with "has_many" and "belongs_to" then the program will work correctly.
Can anyone tell what am I doing wrong?
Looks like there's some kind of collision with your Config class and one that might already be defined. Try changing the name of the model to something like UserConfig.
Or you can use a wrapper module to namespace your classes:
module MyApp
class Config
...
end
class User
...
end
end