Keep params after render Ruby on Rails

Question

I have a Project that belongs to User. In my user view I have a link to add a new project, with the parameter for the user I want to add the project to. ``` <%= link_to 'Add new project', :controller => "project", :action => "new", :id => @user %> Url: /projects/new?id=62 ``` Adding a project to a user works. The problem is when the validation fails while adding a new project and I do a render. ``` def create @project = Project.new(params[:project]) if @project.save redirect_to :action => "show", :id => @project.id else render :action => "new" end end ``` view: ``` <%= form_for @project do |f| %> <%= f.label :name %> <%= f.text_field :name %> <%= f.hidden_field :user_id , :value => params[:id] %> <%= f.submit "Create project" %> <% end %> ``` routes ``` resources :users do resources :projects end ``` How can I keep the parameter for the user after the render? Or is there some better way to do this? Been looking at a lot of similar questions but can't get it to work.

Accepted Answer

try

```
render :action => "new", :id => @project.id
```

if its not works for you, then try alternate way to pass the parameter to your render action.

This can also help you-> Rails 3 Render => New with Parameter

Keep params after render Ruby on Rails

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Problem