Rails error messages not showing?

Question

I'm new to rails...but I'm trying to do an app on my own to "practice" what I've learned.

I have a new form with model validations, but the error messages aren't showing. Here is what I have:

seed.rb (Model)

class Seed < ApplicationRecord
    validates :name, presence: true
    validates :category, presence: true
    validates :latin, presence: true
    validates :maturity, presence: true
    validates :sun, presence: true
    validates :sow, presence: true
    validates :cycle, presence: true
    validates :description, presence: true, length: { minimum: 5, maximum: 500 }
    mount_uploader :seedimage, SeedImageUploader
end

seed_controller.rb (Controller)

  class SeedsController < ApplicationController    
    def index
       @seeds = Seed.all 
    end

    def new
       @seed = Seed.new
    end

    def create
      @seed = Seed.new(seed_params) 
      if @seed.save
        redirect_to seeds_path
      else
        render 'new'
      end
    end

    def edit

    end

    def update
       @seed = Seed.find(params[:id])  
       if @seed.update(seed_params)
           redirect_to @seed
       else
            render 'edit'
       end
    end

    def show
      @seed = Seed.find(params[:id])  
    end

    def destroy
      @seed = Seed.find(params[:id])
      @seed.destroy

      redirect_to seeds_path
    end

    def seed_params
      params.require(:seed).permit(:name, :category, :latin, :maturity, :sun, :sow, :cycle, :description, :seedimage)
    end

  end

_form.html.erb (Form for 'New') ( new.html.erb just has <% render 'form' %>

<%= form_with model: @seed, class: "form-horizontal" do |f| %>

  <% if @seed.errors.any? %>
    <div id="error_explanation">
      <h2>
        <%= pluralize(@seed.errors.count, "error") %> prohibited
        this seed from being saved:
      </h2>
      <ul>
        <% @seed.errors.full_messages.each do |msg| %>
          <li><%= msg %></li>
        <% end %>
      </ul>
    </div>
  <% end %>

    <div class="form-group">
    <%= f.label :name %>
    <%= f.text_field :name, class: "form-control", placeholder: "Seed Name" %>
    </div>
    <div class="form-group">
    <%= f.label :category %>
    <%= f.text_field :category, class: "form-control", placeholder: "Category: 'beans'" %>
    </div>
    <div class="control-label">
    <%= f.label :latin %>
    <%= f.text_field :latin, class: "form-control", placeholder: "Latin Name" %>
    </div>
    <div class="form-group">
    <%= f.label :maturity %>
    <%= f.number_field :maturity, class: "form-control", placeholder: "Maturity Time" %>
    </div>
    <div class="form-group">
    <%= f.label :sun %>
    <%= f.select(:sun, options_for_select([['Full Sun'], ['Partial Sun'], ['Full Shade']]), {}, { class: "custom-select"})  %>
    </div>
    <div class="form-group">
    <%= f.label :sow %>
    <%= f.text_field :sow, class: "form-control", placeholder: "Plant Indoors/Sow Outdoors/etc.." %>
    </div>
    <div class="form-group">
    <%= f.label :cycle %>
    <%= f.text_field :cycle, class: "form-control", placeholder: "Annual/Perennial/etc.." %>
    </div>
    <div class="form-group">
    <%= f.label :description %>
     <%= f.text_area :description, size: "60x12", class: "form-control" %>
    </div>
    <div class="form-group">
    <%= f.label :seedimage %>
     <%= f.file_field :seedimage, class: "form-control" %>
    </div>

    <div class="form-group">
    <%= f.submit "Create", class: "btn btn-primary btn-lg" %>
    </div>
<% end %>

I'm a bit confused why this doesn't work? Right now when I hit the create button it flashes, but no error messages. I can CONFIRM that the model is using the validations because if I try to do a Seed.create() and check messages against that it doesn't indeed work....so I'm a bit confused?

From what I can tell the .any? isn't happening, since if I do a ! to that statement it'll at least display 0 messages .

Answer 1

You are not seeing any error messages because all the forms generated by form_with tag are remote: true by default and send xhr(ajax) requests to the server. If you want to see the error messages, as of your current setup, you have to add local: true wich makes the submission normal.
Replacing

<%= form_with model: @seed, class: "form-horizontal" do |f| %>

with

<%= form_with model: @seed,  local: true, class: "form-horizontal" do |f| %>

will do the trick. Hope this will help.