Ruby on Rails: Creating Delete Link Of Associated Object

Question

Getting this error:

undefined method `to_model' for #<Paperclip::Attachment:0x007fc5d1c46e60>

I'm trying to create a remove link to my associated image

<% @project.project_images.each do |image| %>
    <%= image_tag image.photo.url(:thumb) %>
  <div class="actions">
  <%= link_to "remove", image.photo, confirm: "Are you sure?", method: :delete %>
<% end %>

My Model

class Project < ActiveRecord::Base
  has_many :project_images, dependent: :destroy
  accepts_nested_attributes_for :project_images, allow_destroy: true
end

class ProjectImage < ActiveRecord::Base
  belongs_to :project
end

I believe my image.photo is wrong, but I'm not sure what it should be? I guess I should determine what the path is? But I don't have a routes for ProjectImages. I'm only saving the images through nested attributes. Do I really need to create a new routes? If so, what would it be?

EDIT (Adding Routes)

This is my routes:

resources :projects do
  member do
    get 'add_photos'
    post 'upload_photos'

  end
end

@bipashant Hi, I added my routes, this is whats in my routes that pertains to projects — hellomello
– hellomello, Commented Aug 15, 2015 at 21:54

Bibek Sharma · Accepted Answer · 2015-08-17 02:14:53Z

2

<% @project.project_images.each do |image| %>
  <%= image_tag image.photo.url(:thumb) %>
  <div class="actions">
    <%= link_to "remove", project_path(@project.id, project: { project_images: { id: image.id, "_destroy" => true }}), remote: true, confirm: "Are you sure?", method: :put %>
  </div>
<% end %>

edited Aug 17, 2015 at 2:14

answered Aug 15, 2015 at 18:33

Bibek Sharma

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6 Comments

hellomello Over a year ago

Hello! I'm getting this error: undefined method 'project_image_path' for #<#<Class:0x007fb005320c50>:0x007fb005308970>

Bibek Sharma Over a year ago

Please try this link_to "remove", project_path(@project.id, project: { project_images: { id: image.id, "_destroy" => true }}), remote: true, confirm: "Are you sure?", method: :put

Bibek Sharma Over a year ago

stackoverflow.com/questions/7150329/…

hellomello Over a year ago

I'm able to implement the code, but nothing has happened?

hellomello Over a year ago

Okay, I figured it out.. kinda... still need help though. So instead of project_images:, I did project_images_attributes: but it doesn't pop up a message, because of the remote: true. So I only know it was deleted, when I refresh. If I take this remote: true off, it gets redirected to the show page. I just want to keep it in the same page where this delete photo is. Its not confirming if I wanted to delete the photo or not.

|

Alex Antonov · Accepted Answer · 2015-08-15 16:38:36Z

-1

Just remove .photo in the link_to, because of it's not an object, this is a scope to define methods to work with photo (previews and so on):

<% @project.project_images.each do |image| %>
  <%= image_tag image.photo.url(:thumb) %>
  <div class="actions">
    <%= link_to "remove", image, confirm: "Are you sure?", method: :delete %>
  </div> <!-- maybe, you forgot it? -->
<% end %>

answered Aug 15, 2015 at 16:38

Alex Antonov

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3 Comments

hellomello Over a year ago

I removed it and now I'm getting this error: undefined method 'project_image_path' for #<#<Class:0x007fc5cfff1be8>:0x007fc5ce1db050>

Alex Antonov Over a year ago

It isn't error of it's scope. Please show us line, which cause the error, plus show us your config/routes.rb

hellomello Over a year ago

Its showing it on this line <%= link_to "remove", image, confirm: "Are you sure?", method: :delete %>. I also added my routes that pertains to projects

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