similar to: Strange behaviour with ActiveRecord has_many collections, Rails 4 compared to Rails 3

Hello folks! Beare with me for a second, while I explain my problem. Assuming we have the trivial model of class Author has_many :books end class Book end How do people go about creating the authors/edit and authors/new views if you want to be able to add and remove arbitrary amount of Books at Author creation and edit time? What I mean by this is that I go to

Hi all, In my controller I am doing the following to populate a nested form for a has_many through association: def new @specification = Specification.new Component.find_each.each do |component| @specification.component_specifications.build(:component_id => component.id) end The idea being whenever someone creates or edits a form, it will be populated with all

Since there''s no ''exists?'' method for a has_many collection, is there an easier way to avoid adding duplicates to a collection? (I assume obj.items << item would add duplicates if repeatedly called.) Right now I do: category = Category.find_or_create_by_name(category_name) directory.categories << [ category ] if directory.categories.find(:first,

I tried: @item.stuff<<thing and in thing I have: def stuff_id=(value) # remember old stuff_id cuz Rails has lousy trigger equivalent logger.debug ''set stuff_id called'' end And apparently stuff_id doesn''t get called, but the fk is changed directly in the database? I''m about to abandon trying to do trigger related stuff in Rails and go back to

Hi all, I have an Active Record problem. Having this classes declaration. class Sale < ActiveRecord::Base has_many :sale_line_items, :class_name ''SaleLineItem'' ... end class SaleLineItem < ActiveRecord::Base ... end When I try to delete an item in a Sale class method from sale_line_items (sale_line_items.delete(li)), it extracts ''li'' from

Hi, I''m facing a strange behavior in Rails with the has_many association and the generated collection<<(object, ...) method that comes along. I''ve got an Object model and a Tag model, plus a taggings table to join the two together. On Object, I set these associations: has_many :taggings, :as => :taggable, :dependent => :destroy has_many :tags,

Dear list, I try to update the prabclus package. R CMD check works nicely, no warnings, good results in all tests. However, building the package fails: ginkgo:/disk5/home/chrish/RAusw/libsrc R CMD build prabclus * checking for file 'prabclus/DESCRIPTION' ... OK * preparing 'prabclus': * checking whether 'INDEX' is up-to-date ... OK * removing junk files * building

I'm trying to optimize some of my queries by taking advantage of eager loading. I've created a gist with the specific problem I'm seeing here: https://gist.github.com/tybenz/9944205 Any ideas why the eager loading works for grabbing the collection from the rails console but a SQL query is required when I try to access the collection from inside the instance method? Is there

I am trying to list all the categories a user can be interested in with check boxes so that a user can submit these interests through my join table. collection_radio_buttons works with a simple has_many, belongs_to association: <%= collection_radio_buttons(:listing, :category_id, Category.all, :id, :name do |b| %> <%= b.label { b.radio_button} %> <%= b.text %>

Hi I'm looking for ways to replace "has_many ... counter_sql: '...'" in order to migrate an app from Rails 3.2 to 4.0 (done) and then up to 4.1 which has dropped support for "counter_sql". An example is on Stackoverflow: http://stackoverflow.com/questions/22988321/replacement-for-has-many-counter-sql-in-rails-4-1 I'd do it with a separate counter method,

Hi everyone! For those of you who are not noticed the in-place edit method for collection associations are broken in the current rails release - 4.0.0, and here''s what is cooking in the rails master https://github.com/rails/rails/commit/1a40be02113287d9a003f8224e91b9f623857f4b and this https://github.com/rails/rails/pull/12227 In short: it looks like things like has_many.reject!{},

I''m working on a simple photo gallery in rails, it seems to be a good project for a newbie. I have photos and categories, many-to-many association. It worked well with HABTM. Then I decided that it would be good to be able to change order of the photos so that thumbnail pages would look less chaotic. So I created a Layout model which is a join model (or whatever it is called) that

It seems that using a join model that joins with two has_many''s will fail to generate proper SQL class StudentSemesterRecord < ActiveRecord::Base belongs_to :semester has_many :discipline_records, :through => :semester end class Semester < ActiveRecord::Base has_many :student_semester_records has_many :discipline_records end class DisciplineRecord <

I am trying to use in_place_editor_field to make many objects editable at the same time. I think I solved the first step of this problem; before it was giving me a problem about referencing a nil, so I did this: <%= in_place_editor_field ''question[]'', :name %> adding the [] seemed to fix things. Now all the fields show up on the page and they are all clickable. But

I have a user model that owns messages : class User < ActiveRecord::Base has_many :messages , :dependent => :nullify end I''m using nullify so that when the user is deleted, the messages continue to exist - they''re just marked as being ownerless. However, calling user.messages.clear actually deletes all his messages, which I was a little surprised at. I would

Greetings, I''m looking for suggestions on how to simplify getting customer addresses on a form: I''m jumping between controller and view several times; alternating between rhtml and rjs, in order to display customers and their addresses on an invoicing form. It''s very messy. I have a one to many relationship between Customer and Addresses, each customer has one or more

I appreciate this is basic stuff but can''t seem to find the answer anywhere using Google. If someone could point me in the direction of some documentation on this I would be very appreciative. If I have a collection as follows: @stuff = Stuff.find_by_type(''new'') And I then want to add something onto it, how can I add to this collection? Additionally how could I go

Hi, I''m successfully using the realtime_form_validation plugin from http://railsrtv.rubyforge.org/ However, my forms contain collections, as described in the AWDWR book. Basically my form looks like this. 2004 2005 2006 Question 1 12 13 15 Question 2 9 11 13 I have the following code to generate ids for my input fields.

Hiall, I have the following problem: I need to use forms containing collections (i will call them FCC), and I want to construct them dynamically, as I need to deal with quite large forms (more than 600 input fields). The variables @model_name and @field_name contain the proper model and field names as strings, which is enough for "normal" form input fields. (i.e. the "if

I saw this issue addressed in mid-January under the heading ''TIP: Using field_error_proc to add style attributes to form elements'', but I didn''t quite get it. I have a collection of objects that I want to input in one form and validate (during update). The suggestion in the post I referred to above was to use something like [in form] > <% for @comment in