param is missing or the value is empty: plant - ruby-on-rails

Question

I have added a custom action in my controller called transplant. I simply want to render a dropdown form to select where to be located based on the 'tray_id'
my routes look like this:
resources :plants do
member do
get 'transplant'
end
resources :plantdats, :plant_cycles, :tasks
end
My controller looks like this:
before_action :set_plant, only: [:show, :edit, :update, :destroy, :transplant]
def transplant
if #plant.update(plant_params)
redirect_to #plant
flash[:success] = "Transplanted successfully"
end
end
def set_plant
#plant = Plant.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def plant_params
params.require(:plant).permit(:title, :notes, :category_id, :tray_id, images_files: [])
end
Here is my button calling the action
<%= link_to 'TRANSPLANT', transplant_plant_path(#plant), class: "btn btn-raised btn-info hoverable" %>
Here is my transplant page _transplant.html.erb
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="jumbotron">
<%= form_for(#plant, html: {class: 'form-horizontal'}) do |f| %>
<% if #plant.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#plant.errors.count, "error") %> prohibited this grow from being saved:</h2>
<ul>
<% #plant.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.label 'NAME' %>
<%= f.hidden_field :tray_id, value: params[:tray_id] %>
<% if params[:tray_id].nil? %>
<%= f.collection_select(:tray_id, Tray.all, :id, :title) %></br></br>
<% end %>
<%= f.submit class: 'btn btn-raised hoverable btn-success' %>
<% end %>
</div>
</div>
</div>
EDIT
After implementing the route to post 'transplant
and changing my link code to
<%= link_to "TRANSPLANT", transplant_plant_path(#plant, tray_id: #plant.tray_id), method: "post", class: "btn btn-raised hoverable" %>
I still get the same error. It points right to the plant_params code in my controller.
These are the params that are being passed:
{"_method"=>"post",
"authenticity_token"=>"fhSKt2DpgTwt1J4HsoBqYFSs0B9+pgSvDDxrS/u6yo4c3gvSxYlrrFDmhbPXq+cMho/eTHY+194WZ8zpcb1txA==",
"id"=>"1",
"format"=>"1"}
Im simply trying to update the :tray_id
Ive been at this all day, can anyone help with the error that Im getting?

Answer 1

You should probably provide your code for your transplant action and view. Based on what you provided, it seems like you're trying to build a link, which changes the tray of a plant when clicked. If that's the case, transplant should probably be a POST route instead of GET. Also, you probably want to provide the tray_id in your post link like this:
<%= link_to "TRANSPLANT", transplant_plant_path(#plant, tray_id: {{your id}}), method: "post", class: "..." %>
Then you can get tray_id in your transplant through params[:tray_id] and re-associate your plant and tray

Answer 2

Essentially what I was trying to do was not easily done and my approach needed to change. I simply rendered the transplant form in my view and it works fine now. Thanks again :)

Answer 3

Check your routes you just have defined get route and your request is post after the form submission