Render error on new page with customize url like h

问题:

I am trying to pass query parameter with new action http://localhost:3000/education_informations/new?user_id=10 and also set form validation on it. when form submit failed so its display error but url is changes like http://localhost:3000/education_informations so I want to same customize url and pass query parameter with user_id. Please help me

controller code give below

def create
    @edu_info = EducationInformations.new(educational_params)

        if @edu_info.save
            #flash[:notice] = 'Vote saved.'
            redirect_to @edu_info
        else
            render 'new'
        end     

end

回答1:

You can pass the parameters to the form_for like below to keep user_id in the URL even after the form submission failed.

<%= form_for @edu_info, :url => { :action => :create, :user_id => @user.id } %>

or

<%= form_for @edu_info, :url => { :action => :create, :user_id => current_user.id } %>

If @user is not initialised.

Source

回答2:

I am supposing that the education information will always be realted to the user. So to create the route you should do as:

In routes file:

resources :users do
  resources :education_informations
end

So what this will do is create the route as I specified in the comments. Like this will be routes:

user_education_informations     GET    /users/:user_id/education_informations(.:format)          education_informations#index
                                POST   /users/:user_id/education_informations(.:format)          education_informations#create
 new_user_education_information GET    /users/:user_id/education_informations/new(.:format)      education_informations#new
edit_user_education_information GET    /users/:user_id/education_informations/:id/edit(.:format) education_informations#edit
     user_education_information GET    /users/:user_id/education_informations/:id(.:format)      education_informations#show
                                PATCH  /users/:user_id/education_informations/:id(.:format)      education_informations#update
                                PUT    /users/:user_id/education_informations/:id(.:format)      education_informations#update
                                DELETE /users/:user_id/education_informations/:id(.:format)      education_informations#destroy
                          users GET    /users(.:format)                                          users#index
                                POST   /users(.:format)                                          users#create
                       new_user GET    /users/new(.:format)                                      users#new
                      edit_user GET    /users/:id/edit(.:format)                                 users#edit
                           user GET    /users/:id(.:format)                                      users#show
                                PATCH  /users/:id(.:format)                                      users#update
                                PUT    /users/:id(.:format)                                      users#update
                                DELETE /users/:id(.:format)                                      users#destroy

So for the new eudcation information form you need to give this path new_user_education_information_path(user) where user will be the clicked user.

You can get more information here: http://guides.rubyonrails.org/routing.html#nested-resources

Hope this helps.

回答3:

You can use redirect_to with url parameters.

In your #create action you will have your current user_id params:

user_id = params[:user_id]

If you want to redirect_to @edu_info and keep the params, you can set them via the options hash on the redirect_to method:

redirect_to @edu_info(user_id: user_id)

Does that make sense to you?