I'm playing with MongoDB in Rails 3 via Mongoid. I've defined the classes below, but when I attempt to create a new Hyperlink via the scaffolded view I get an error. I believe what is happening is that the Tags array is not being handled properly. I'm using the default controller scaffold. What do I need to do to ensure mongoid knows how to add the tags?
class Hyperlink
include Mongoid::Document
field :name
field :url
embeds_many :comments
references_many :tags
validates_presence_of :name, :url
validates_uniqueness_of :name, :url
end
class Tag
include Mongoid::Document
field :name
validates_uniqueness_of :name
referenced_in :hyperlink
end
Controller response
TypeError in HyperlinksController#create
can't convert Symbol into Integer
**Request**
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"yn5SwZPBIMcpzrGQeO9t3tJ2Y2Q6nlsDBPbI43ahj0k=",
"hyperlink"=>{"name"=>"Stack Overflow",
"link"=>"http:://www.stackoverflow.com",
"tags"=>{"tag"=>"programming"}},
"commit"=>"Create Hyperlink"}
Try adding accepts_nested_attributes_for :tags to HyperLink .
Ideally your parameters should look something like this(notice the change in tags):
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"yn5SwZPBIMcpzrGQeO9t3tJ2Y2Q6nlsDBPbI43ahj0k=",
"hyperlink"=>{"name"=>"Stack Overflow",
"link"=>"http:://www.stackoverflow.com",
"tags"=>{"0" => {"name"=>"programming", :id => "xxxx"}}},
"commit"=>"Create Hyperlink"}
As jdc already pointed controller and view code would be much helpful to actually point out the problem.
Related
I have made the following addition to my active admin interface:
action_item :only => :show do
link_to('Approve this article', approve_admin_article_path(article)) if article.approved.nil?
end
member_action :approve, :method => :get do
# do approval
redirect_to :action => :show, :notice => "Approved!"
end
This throws the following error:
undefined method `approved' for
:Arbre::HTML::Article
What I think is happening is Active Admin thinks I'm passing an article tag in, not an article class?
Does anyone know of a work around for this? perhaps aliasing?
Thanks!
class Article < ActiveRecord::Base
attr_accessible :body
# Relations:
belongs_to :articleable, polymorphic: true, :counter_cache => true
has_many :comments, as: :commentable, order: 'created_at DESC', dependent: :destroy
# Validations
validates_presence_of :body
validates_length_of :body, maximum: 15000
end
Found a workaround
There is something fishy when you name your class as 'Article', ActiveAdmin relate to it when rendering as <article> HTML tag - The problem is somewhere in the controller of course because this is where the article object is being generated
So, I override the controller
ActiveAdmin.register Article do
controller do
def show
# grabbing my desired Article and not the <article> tag into some global variable
##myarticle = Article.find(params[:id])
end
end
sidebar :article_details , :only => :show do
ul do
# using the ##myarticle which I know should be initialized
# (you can put .nil? checking here if you want)
li link_to 'Article Images (' + ##myarticle.images.count.to_s + ')' , admin_article_article_images_path(##myarticle)
li link_to 'Article Clips ('+##myarticle.clips.count.to_s + ')' , admin_article_article_clips_path(##myarticle)
end
end
end
Enjoy
Assuming you're having the issue in the 'show' block, you could change the show block to the following:
show do |object|
end
Then you can call object.some_method without the clash. This way you don't need to override the controller.
Hi everyone I am new with rails 3,I have a app where I want to associate a idea with a comment.
When I show an idea, in the bottom of the view I show a form to put new comment for this idea, and when a click to save a comment, I have to pass the idea_id, I create my model commment
belongs_to :user
belongs_to :idea
attr_accessible :description, :likes, :name, :user_id, :idea_id
in the view of show idea a put this
= render :partial => "comments/index", :collection => #idea.comments
= render :partial => "comments/form", :locals => {:comment=> #comment}
in the _form of the comment I include idea to obtain idea_id to save
= form_for [#idea, #comment] do |f|
and in my router I put this
resources :ideas do
member do
resources :comments
end
end
and now I obtain this error
undefined method `idea_comments_path'
any idea, anyone knows a document to explain better how to use member in rails!
You don't need member for nested resources:
resources :ideas do
resources :comments
end
http://guides.rubyonrails.org/routing.html
I came back to the relatively "old book" Head First rails, which was published for Rails 2.3.
Now, going back again through those samples and using Rails 3 I came up with some questions.
Let's say that I'm adapting the sample for coconut airways and instead of flights and seats, I have a project and tasks.
The page shows a project description and below a list of tasks associated to that project. so far so good. now below that there is a form to create new task. This task needs a Task object and the project_id. here is when things do not work as before.
if you want to do it like the old style you will type:
<%= render :partial => "new_task",
:locals => {:task => Task.new(#project.id)} %>
well, this is showing the mass-assign error.
Then I tried to pass both as parameter:
<%= render :partial => "new_task",
:locals => {:task => Task.new, :project_id => #project.id} %>
and assign it in the partial
<%= f.hidden_field :project_id, :value => project_id %>
any hint?
EDITED:
class Task < ActiveRecord::Base
belongs_to :project
attr_accessible :title
end
class Project < ActiveRecord::Base
has_many :tasks
attr_accessible :description, :title
end
If you change your model's attr_accessible you can include these assignments to be made. For more information about attr_accessible and mass assignment see: Ruby on Rails API
so I have a tricky issue here I'm not sure how to solve.
I have a Provider model that has_many :educational_affiliations
EducationalAffiliation belongs_to :institution & belongs_to
:provider
I have about 9000 universities in my database, so I'm using the handy-dandy rails3-jquery-autocomplete gem to give me type-ahead support. That's all working great - on TOP of that I'm using cocoon to support the nesting of the :educational_affiliations form inside of the provider's edit form.
So here's where the issue comes — This works great for submitting new affiliation records, (I'm using some jquery to set the :institution_id on the :educational_affiliations_attributes object, works great)
BUT when I return to edit this later, of course the :institution_name isn't populated, because it's not part of the :educational_affiliations model, it's in the :institution model.
Here's what I just tried in my :educational_affiliations, which I assume is the right solution:
class EducationalAffiliation < ActiveRecord::Base
attr_accessible :degree, :graduation_year, :honors, :institution_name, :institution_id, :provider_id
belongs_to :institution
belongs_to :provider
# attr_accessor :institution_name
validates :institution_id, :graduation_year, :provider_id, :degree, presence: true
def institution_name
Institution.find(institution_id).name
end
end
(i had it working for saving using the attr_accessor, but I've commented it out for now)
So when I render the edit view with the above, I get a ActiveRecord::RecordNotFound: Couldn't find Institution without an ID error — but when I open a debugger on that statement, the model DOES seem to know the institution_id...so confused why it doesn't pick it up.
Am I just doing this in the worst way possible? I assume there's a dumb solution.. :)
Here's the partial that needs the name populated:
.nested-fields
= f.input :institution_name, url: autocomplete_institution_name_data_path, as: :autocomplete, :input_html => {:id_element => '#provider_educational_affiliations_institution_id'}
= f.input :institution_id, as: :hidden
= f.input :provider_id, as: :hidden, input_html: { value: current_provider.id }
= link_to_remove_association "Remove Degree", f
Instead of the virtual attribute method, try the following to define the attribute:
delegate :name, :name=, :to => :institute, :prefix => true
I'm trying to build up on the following tutorial from railscast:
http://railscasts.com/episodes/196-nested-model-form-part-1
I'm trying to make everything work with mongodb and mongoid.
the scenario is:
I want to creates events linked to a location. Each events (dance class) contains many lessons.
So I thought that an embedded relationship would be perfect.
Here are my models
model Lesson
class Lesson
include Mongoid::Document
include Mongoid::Slug
field :name, :type => String
embedded_in :event
slug :name
end
model Event
class Event
include Mongoid::Document
include Mongoid::Slug
include Mongoid::Timestamps
include Mongoid::MultiParameterAttributes
field :name, :type => String
field :description, :type => String
field :date, :type => DateTime
validates_presence_of :name
has_one :venue
referenced_in :venue
embeds_many :lessons
slug :name
end
model Venue
class Venue
include Mongoid::Document
include Mongoid::Slug
include Mongoid::Timestamps
include Mongoid::MultiParameterAttributes
field :name, :type => String
field :location, :type => String
validates_presence_of :name, :location
belongs_to :event
slug :name
end
event controller
def create
#event = Event.new(params[:event])
if #event.save
flash[:notice] = 'Event was successfully created.'
end
respond_with(#Event, :location => events_url)
end
def update
# #event = Event.find(params[:id])
#event = Event.find_by_slug(params[:id])
if #event.update_attributes(params[:event])
flash[:notice] = "Event was succesfully updated"
end
respond_with(#event)
end
Then I have my Event view where I can create events and link it to a Venue. But I'd like to be abe to create the lessons from the Event view/model.
so I used the fields_for to generate a field linked to the Lessons model.
= form_for #event do |f|
.field
= f.label :name
%br/
= f.text_field :name
.field
= f.label :description
%br/
= f.text_area :description
.field
= f.label :venue_id
%br/
= f.collection_select :venue_id, Venue.all, :id, :name
.field
= f.label :date
%br/
= f.datetime_select :date
%h3 Add a Class
= f.fields_for :lessons do |builder|
= render "lesson_fields", :f => builder
.actions
= f.submit 'Save'
When I create or edit a new event I get an error message:
undefined method `extract_id' for "test":String
But the request parameter message on the error page shows my lessons value in the Event document.
"lessons"=>{"name"=>"test name lesson"}
When I remove the fields_for line, everything works fine. But then i don't know how to save the value for the nested documents.
I have same problem with embeds_many, but when i try change to has_many. It works!. Maybe you can try too.
can you post the exact code you use to create the Event, including parameters?
which version of Mongoid and Rails are you using?
First thing I noticed is that the following parameter hash does not match your Lessons model:
"lessons"=>{"content"=>"test name lesson"} # this looks wrong
this should be:
"lessons"=>{"name" => "test name lesson"}
Looks like your lessons form has the wrong label for the text input field .. it should be :name , not :content
To dry things up, you might want to try if the 'nested_form' gem works for you:
after installing the gem, use the nested_form_for instead of form_for in your view.
Check here for a more detailed description:
How can I handle this type of multi level forms in rails
See:
https://github.com/ryanb/nested_form (it's also referenced in the RailsCast you mentioned)
You also might want to check this:
field_for and nested form with mongoid
The conclusion of this story is...
I removed everything related to mongoid_slug and it started to work.
I then put everything back as it was to try to find out how to make it work with mongoid_slug and it just worked, like out of the box.
:(
Please include the following code in model event.rb
**accepts_nested_attributes_for :lessons**
This will fix your problem