passing dynamic variable to partial for rendering in a modal - ruby-on-rails

Question

I have the following Code on a partial that dynamically generates a list of associated steps to a pin. Both pins and steps have image(s). Users are able to add multiple steps to a pin and then this view dynamically generates a view of these steps. For each step there are associated image(s) which I'd like to pop-up as a modal. The challenge is I keep getting the following error:
"undefined local variable or method `step' for #<#:0x00000102f498d8>"
When I stub out rendering the partial, the modal appears basically blank but works. Any ideas How do I do this?
<div class="col-md-6">
<% (0..(Step.where("pin_id = ?", params[:id]).count)-1).each do |step| %>
<div class="col-md-12">
<div class="well">
<ul class="nav pull-right">
<% if current_user == #pin.user %>
<%= link_to edit_step_path((Step.where("pin_id = ?", params[:id]).fetch(step)), :pin_id => #pin.id) do %>
<span class="glyphicon glyphicon-edit"></span>
Edit
<% end %> |
<%= link_to Step.where("pin_id = ?", params[:id]).fetch(step), method: :delete, data: { confirm: 'Are you sure?' } do %>
<span class="glyphicon glyphicon-trash"></span>
Delete
<% end %> |
<%= link_to new_step_image_path(:step_id => Step.where("pin_id = ?", params[:id]).fetch(step), :pin_id => #pin.id) do %>
Add
<span class="glyphicon glyphicon-picture"></span>
<% end %>
<% end %>
<% if StepImage.where("step_id = ?", Step.where("pin_id = ?", params[:id]).pluck(:id).fetch(step)).count == 0 %>
<% else %>
| <a href="#StepImageModal" data-toggle="modal">
<span class="glyphicon glyphicon-picture"></span> (<%= StepImage.where("step_id = ?", Step.where("pin_id = ?", params[:id]).pluck(:id).fetch(step)).count %> ) </strong>
</a>
<% end %>
</ul>
<strong> Step <%= step+1 %>
<p>
<%= Step.where("pin_id = ?", params[:id]).pluck(:description).fetch(step) %>
</p>
</div>
</div>
<%end %>
</div>
<div class="modal fade" id="StepImageModal">
<div class="modal-header">
<a class="close" data-dismiss="modal">×</a>
<h3>Modal Header</h3>
</div>
<div class="modal-body">
<%= render :partial => 'pins/step_images',
:locals => { :step => step } %>
</div>
<div class="modal-footer">
Close
</div>
</div>

Answer 1

I don't get what you're trying to do here
Loop
As mentioned in the comments, you've got a loop which goes through your steps. However, outside the loop, you want to display the partial
The solution to your woes will either be to set an instance variable (not desired), or use another persistent data type. I'd do this:
#app/controllers/steps_controller.rb
def action
#step = {}
end
#app/views/steps/action.html.erb
<% (0..(Step.where("pin_id = ?", params[:id]).count)-1).each do |step| %>
<% #step[step.id.to_sym] = step.details %>
<% end %>
<%= render :partial => 'pins/step_images', :locals => { :step => #step } %>
unless
Some refactoring for you:
<% unless StepImage.where("step_id = ?", Step.where("pin_id = ?", params[:id]).pluck(:id).fetch(step)).count == 0 %>
| <%= link_to "#StepImageModal", data: { toggle: "modal"} do %>
<span class="glyphicon glyphicon-picture"></span>(<%= StepImage.where("step_id = ?", Step.where("pin_id = ?", params[:id]).pluck(:id).fetch(step)).count %> ) </strong>
<% end %>
<% end %>