I finally came to ask this question since I found no answer and it kept bothering me. What's the reason behind this behavior ? Is it REST-thingy-driven :) ?
I found this "workaround" but no explanation : How to make a render :edit call show the /edit in the address bar
Thanks
EDIT
My question was not that well written, sorry. Why the default Rails behavior is not to redirect to the edit template? That would feel more logical, to me at least :)
render doesn't redirect, so there's no reason the URL bar address would change.
The default update method looks like this:
# PUT /posts/1
# PUT /posts/1.json
def update
#post = Post.find(params[:id])
respond_to do |format|
if #post.update_attributes(params[:post])
format.html { redirect_to #post, notice: 'Post was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
The URL is /posts/1, which is what displays in the URL bar. If update_attributes fails, e.g., a validation error, it renders the "edit" template, with no redirect.
Related
I have a Rails 3.2 app that uses session store in the controllers to get the user back to the screen they were previously on.
It's been working fine for over a year. All of a sudden, the production version on Heroku, has started having issues. The user is looking at a worequest and clicks on the following in order to add a comment.
<%= link_to 'New Comment', new_comment_path(:worequest_id => #worequest.id), :class => 'btn btn-primary' %>
This is the code I use:
def new
#comment = Comment.new
#comment.build_attachment
#worequest = params[:worequest_id]
session[:return_to] ||= request.referer
respond_to do |format|
format.html # new.html.erb
format.json { render json: #comment }
end
end
# POST /comments
# POST /comments.json
def create
#comment = Comment.new(params[:comment])
respond_to do |format|
if #comment.save
if session[:return_to] != nil
format.html { redirect_to session.delete(:return_to), notice: 'Comment was successfully created.' }
format.json { render json: #comment, comment: :created, location: #comment }
else
format.html { redirect_to :back, notice: 'Comment was successfully created.' }
format.json { render json: #comment, comment: :created, location: #comment }
end
else
format.html { render action: "new" }
format.json { render json: #comment.errors, status: :unprocessable_entity }
end
end
end
In development and staging (on Heroku), the user goes back to the worequest after entering a new comment.
Now in Production, the url looks like this:
mywebsite/comments instead of mywebsite/worequests/639
I'm not even sure where the session[:return_to] gets stored. Therefore, I'm having trouble debugging the issue.
Thanks for your help!!
Are you able to replicate this behavior 100% of the time, or just seeing it sometimes in your log?
It looks like someone is getting to comments#new from /comments (comments#index). Is there a route to /comments?
Run rake routes to see all your routes.
If there is a route to comments#index, and there's no reason for it to be exposed because you only intend for people to post comments from within the context of a specific article, consider removing it the comments#index route.
Also, one thing to consider, request.referrer is not always available. It's sent by the client who may choose not to send it (e.g. certain privacy extensions remove this header).
from the default scaffold generator I have the following create action in my blogs controller:
# POST /blogs
# POST /blogs.json
def create
#blog = Blog.new(params[:blog])
respond_to do |format|
if #blog.save
format.html { redirect_to #blog, notice: 'Blog was successfully created.' }
format.json { render json: #blog, status: :created, location: #blog }
else
format.html { render action: "new" }
format.json { render json: #blog.errors, status: :unprocessable_entity }
end
end
end
When the sent form contains errors, my browser is redirected to /blogs URL but in the page the new action is rendered.
This is really ugly in my opinion and (also to simplify my javascript) I would like the browser to remain in the same blogs/new URL.
I tried with changing redirect_to :new instead of render action: "new", but this of course loses the #blog data.
any clue on how to do this?
thanks,
If you want to keep new in your path you could redirect with params like so:
redirect_to new_blog_path(blog: params[:blog])
and then check for these params in blog#new
I am using almost the code from the regular scaffold. The only change is the 4.times block where I make 4 answer objects on the question. The reason is that I have the corresponding input fields in the view. Now, if the validation fails it renders the new.html.erb again, however after what I have been reading it does not invoke the "new" action again. However I am depending on the 4.times block because otherwise the loop in the view have no answers to loop through. How do I fix this? I tried redirecting but then the error messages disappered.
New action
def new
#question = Question.new
4.times do
#question.answers.build
end
respond_to do |format|
format.html # new.html.erb
format.json { render json: #question }
end
end
Create action
def create
#question = Question.new(params[:question])
respond_to do |format|
if #question.save
format.html { redirect_to #question, notice: 'Question was successfully created.' }
format.json { render json: #question, status: :created, location: #question }
else
format.html { render action: "new" }
format.json { render json: #question.errors, status: :unprocessable_entity }
end
end
end
Exactly as your title suggests: render does just render (the template belonging to) the action and not perform the action itself.
To get your prebuilt answers rendered again in a failed create call, I suggest removing the :reject_if condition from the nested attributes setup. This way, empty submitted answers are preserved. To prevent them from being written to the database, just add regular validations to the Question model...
What you need to look at is the #question in your create action. In theory it should contain the 4 newly built answers so redisplaying the form would also contain these.
If they are not written you may have to look at the accepts_nested_attributes_for to make sure it gets deserialized correctly from the request.
I have a fairly standard controller with a create method and some validations.
def create
#type = Type.new(params[:type])
respond_to do |format|
if #type.save
format.html { redirect_to types_path, notice: 'Type was successfully created.' }
format.json { render json: #type, status: :created, location: #type }
else
format.html { render action: "new" }
format.json { render json: #type.errors, status: :unprocessable_entity }
end
end
end
The problem is that when a validation fails, I get the errorMissing template ontology/types/create, as if the render action: "new" weren't there. If I replace it with a redirect_to then it works as expected, but then it seems I can't pass the form errors along.
I know that there is a #type instance (with #type.errors) from the original call of new, and throwing it just before the render call confirms this.
The same thing is happening when a validation fails on update It seems like the render call is just being ignored!
NOTE: my routing structure is a little unconventional, but I see not reason why this should be related.
This looks very similar: Path defined in controller and action is getting ignored, Ruby on Rails
Based on the answer to that question, I'm guessing that something is missing that is needed for rendering the new view, and as a result rails is just skipping the render call altogether and rendering create.
Can you show the new controller action and view?
I have a partial which gets loaded on a few different views. The partial contains a button which connects to an update method in one of my controllers. After the button gets pressed, I want the action to occur and then redirect back to wherever the current user is. However, when I use things like request.path, it always redirects back to the specific model that the button connects with. How do I do a true redirect back to the current page the user is on, regardless of where the button points to?
In the controller that is being called by the new, edit, or destroy action you will want to change the #controller in the action (create, update, destroy) that is being called.
Below, you can see where when a users creates a new answer, it will redirect them to the previous page.
# POST /answers
# POST /answers.json
def create
#answer = Answer.new(params[:answer])
respond_to do |format|
if #answer.save
format.html { redirect_to :back, notice: 'Answer was successfully created.' }
format.json { render json: :back, status: :created, location: #answer }
else
format.html { redirect_to :back, alert: 'Error Posting Answer.' }
format.json { render json: #answer.errors, status: :unprocessable_entity }
end
end
end