Rails 3 create method redirect to index? - ruby-on-rails

I'm having an issue where my article_controller.rb's create method is redirecting to the index when the article.save fails due to invalid input by the user. The articles creation url is /articles/new but when the submit fails, I'm redirected to /articles. The form is still available in /articles exactly as it was on /articles/new. The desired behavior would be to return to the /articles/new with whatever the user may have entered repopulated in the form. Is there a way to do this? Here are some of the code snippets to illustrate what's going on.
Here is the article new method:
def new
#article = Article.new
respond_to do |format|
format.html
end
end
Here is the article create method:
def create
#article = current_user.articles.new(params[:article])
respond_to do |format|
if #article.save
format.html { redirect_to(#article, :notice => 'Article was successfully created.') }
else
format.html { render 'new' }
end
end
end
Here is the form:
<%= form_for(#article) do |f| %>
.....
<% end %>
I'm eventually hoping to get this working with a :remote => :true call in the form_for, but just want to get it working first the way it is. Any suggestions?

Try
format.html { render :action => "new" }

And if you are using Rails 3+, try writing your controller something like this DRY.
class ArticlesController < ApplicationController
respond_to :html
def new
#article = Article.new
respond_with #article
end
def create
#article = Article.new(params[:article])
#article.save
respond_with(#article)
end
end

Related

First argument in form cannot contain nil or be empty on render

On the update action of the Video controller, I have written -->
def update
if current_user.video.update_attributes(video_params)
flash[:success] = "Video App Updated!"
redirect_to root_url
else
render :edit
end
end
However, the render :edit part seems to be throwing out an error. It says :
First argument in form cannot contain nil or be empty
Extracted source (around line #6):
<div class="row">
<div class="span6 offset3">
<%= form_for(#video) do |f| %> # line 6
I'm assuming I'm not quite understanding what the render is doing. This is what my edit action looks like -->
def edit
#video = current_user.video
end
What do you guys think? Still a noob, much appreciated :)
You don't set #video variable on update action, so it's nil. You should have:
def update
#video = current_user.video
if current_user.video.update_attributes(video_params)
flash[:success] = "Video App Updated!"
redirect_to root_url
else
render :edit
end
end
You should remember that rendering other action's template in controller doesn't run the code of that action. So, if you have
render :edit
the partial edit will be rendered, but controller code for this action (setting #video) won't run.
The line render :edit will show the edit.html.erb view, but the edit action is not executed. The edit.html.erb is expecting a #video variable that is not set in the update action, that's why you have this error. There is 2 solutions:
Set the #video variable in the update_action
def update
#video = current_user.video
if #video.update_attributes(video_params)
flash[:success] = "Video App Updated!"
redirect_to root_url
else
render :edit
end
end
or
Redirect to the edit action when update fails
def update
if current_user.video.update_attributes(video_params)
flash[:success] = "Video App Updated!"
redirect_to root_url
else
flash[:alert] = current_user.video.errors.full_messages.join('\n')
redirect_to :action => :edit, :id => current_user.video.id
end
end
If the edit was complex, the second solution would be better because it avoids duplication. In your case, the first solution is good also.
The difference between render and redirect_to is explained in Guide Layouts and Rendering in Rails 2.3.2
I have the same type of condition and i have done it like this. and its working in my case
def update
#video = current_user.video
respond_to do |format|
if #video.update_attributes(video_params)
format.html { redirect_to root_url }
else
format.html { render :edit }
end
end
end

Issue with before_filter

Please help me try and understand what is happening here:
I need to approve a nested snippet but when I do it says it cannot find book. I think it may be an issue with the routes because the URL in the browser doesn't match the rake routes.
If someone could hold my hand and explain this as you would to a child :)
Couldn't find Book without an ID
Below is the controller with snippets#approve and the before_filter.
class SnippetsController < ApplicationController
before_filter :authenticate_user!
before_filter :find_book
def create
#raise params.inspect
#snippet = #book.snippets.create(params[:snippet])
#snippet.user = current_user
if #snippet.save
redirect_to #book
flash[:success] = "Snippet submitted and awaiting approval."
else
flash[:base] = "Someone else has submitted a snippet, please try again later"
redirect_to #book
end
end
def approve
#raise params.inspect
#snippet = #book.snippets.find(params[:id])
#snippet.update_attribute(:approved, true)
redirect_to admins_path
end
def edit
#snippet = #book.snippets.find(params[:id])
end
def update
#snippet = #book.snippets.find(params[:id])
respond_to do |format|
if #snippet.update_attributes(params[:snippet])
format.html { redirect_to #book, notice: 'Comment was successfully updated.' }
else
format.html { render action: "edit" }
end
end
end
private
def find_book
#raise params.inspect
#book = Book.find(params[:book_id])
end
end
Now I understand that since I'm doing a post my rake routes says this.
/books/:book_id/snippets/:id(.:format)
Here is the routes for the custom route:
active_snippet POST /snippets/:id/activate(.:format)
This is my custom routes for book && snippet :approval
post "books/:id/activate" => "books#approve", :as => "active_book"
post "snippets/:id/activate" => "snippets#approve", :as => "active_snippet"
I've currently got this in my browser ../snippets/2/activate
Erm.... Not sure if I'm thinking correctly.
You're sending a POST request to snippets/:id/activate which calls snippets#approve.
There is a before_filter on the entire SnippetsController that calls find_book which executes #book = Book.find(params[:book_id]). Because your path is snippets/:id/activate, params[:book_id] is nil and hence you are getting that error.
You need to either change your snippets#approve path to include the book_id, or pass the book_id as a POST param so that your before filter has access to it.

Respond_to and redirect in the same action in Rails

In the Update action of Rails controllers usually there is code that looks like this:
def update
#book = Book.find(params[:id])
if #book.update_attributes(params[:book])
redirect_to(#book)
else
render :edit
end
end
In the else case, this will render the edit template. But what if I wanted to use a respond_to, exactly the same way that I have in the edit action, as:
def update
#book = Book.find(params[:id])
if #book.update_attributes(params[:book])
redirect_to(#book)
else
respond_to do |format|
format.html # edit.html.erb
format.json { render :json => #team }
end
end
end
So, if the Update fails, be sure you are returning a json or html depending on the requested format. Does that makes sense? If so, how would you avoid the error: "Render and/or redirect were called multiple times in this action"
Makes sense to me. The answer should be simple, just return after redirect_to.
def update
#book = Book.find(params[:id])
if #book.update_attributes(params[:book])
redirect_to(#book)
return
else
respond_to do |format|
format.html # edit.html.erb
format.json { render :json => #team }
end
end
end
Not sure exactly how you're rendering multiple times, but assuming you are, a well-placed return should tell RAILS to stop processing any further renders after redirecting. If that's all true, it's likely that there's an after_filter interfering from somewhere.

New to jQuery/Ajax how can I add a user relation to creating a new review?

I have been trying to get to grips with jQuery and been following a railscast on adding an Ajax add review form, which works fine but I would now like to add into it the ability for a review to belong to a user as well as a venue.
Reviews controller
def create
#review = Review.create!(params[:review])
#review.venue = #venue
if #review.save
flash[:notice] = 'Thank you for reviewing this venue!'
respond_to do |format|
format.html { redirect_to venue_path(#venue) }
format.js
end
else
render :action => :new
end
end
views\reviews\create.js.erb
$("#new_review").before('<div id="flash_notice"><%= escape_javascript(flash.delete(:notice)) %></div>');
$("#reviews_count").html("<%= pluralize(#review.venue.reviews.count, 'Review') %>");
$("#reviews").append("<%= escape_javascript(render(:partial => #review)) %>");
$("#new_review")[0].reset();
I have tried changing the controller to:
def create
#review = #current_user.reviews.create!(params[:review])
#review.venue = #venue
if #review.save
flash[:notice] = 'Thank you for reviewing this venue!'
respond_to do |format|
format.html { redirect_to venue_path(#venue) }
format.js
end
else
render :action => :new
end
end
but it just wont submit, with no errors.
I think I have the models set correctly with belongs_to and has_many, I think this is a controller issue I'll add other code bits if needed.
Development log
NoMethodError (undefined method `reviews' for nil:NilClass):
app/controllers/reviews_controller.rb:14:in `create'
Thanks for any help!
It appears that your error is residing with #current_user. According to your development log, #current_user is nil when you call #current_user.reviews on it. I would say track down where this #current_user instance variable is being set and find out why it is nil. Now, what kind of authentication are you using? Most authentication plugins, especially those used by Ryan Bates of the Railscasts you mentioned, use a local variable, say just current_user, as the means to access the currently signed in user. I know I do in all my code.
So, rewrite the line as
#review = current_user.reviews.create!(params[:review])
and see if that works. If it doesn't, change it back and then track down where this #current_user is being set. Chances are good it is being set in a before_filter :method_name at the beginning of your controller.
Calling create! (with exclamation mark) will throw an exception and thus abort your create action if saving fails. Check your log/development.log for these exceptions.
Use build instead of create and lose the exclamation mark.
def create
#review = #current_user.reviews.build(params[:review])
#review.venue = #venue
if #review.save
flash[:notice] = 'Thank you for reviewing this venue!'
respond_to do |format|
format.html { redirect_to venue_path(#venue) }
format.js
end
else
render :action => :new
end
end

Integration Testing with Ruby and the assigns keyword

I am trying to perform some integration testing to see if the article gets updated. Here is my integration test:
test "update existing article" do
# create an article
#article = Article.new
#article.title = "title"
#article.abstract = "abstract"
#article.description = "description"
if #article.save
post "/articles/edit", :id => #article.id
assert assigns(:article)
end
end
And here is my articles_controller implementation:
def edit
#article = Article.find(params[:id])
respond_to do |format|
format.html
format.xml { render :xml => #article }
end
end
The last line in test about assigns fails. From my understanding assigns(:article) means that the variable #article will be populated.
Take a look at this line:
post "/articles/edit", :id => #article.id
The problem is that the edit action takes a GET, not a POST, so it's probably never getting called. try:
get edit_article_path, :id => #article.id
(note that if you're running a controller test, it's best to use a symbol for the action name.)

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