Plots2: Update/modernize form error display for Map forms

[first-timers[bot]]

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📋 Step by Step

• [ ] 🙋 Claim this issue: Comment below. If someone else has claimed it, ask if they've opened a pull request already and if they're stuck -- maybe you can help them solve a problem or move it along!

• [ ] 📝 Update the file app/views/map/edit.html.erb in the plots2 repository (press the little pen Icon) and edit the line as shown below.

See this page for some help in taking your first steps!

Here, we will be modernizing a form template, building on #8545 -- read there for more background!

Below is a "diff" showing in red (and a -) which lines to remove, and in green (and a +) which lines to add:

@@ -16,14 +16,30 @@
   %>

   <%= form_for @revision, :as => :revision, :url => url, :html => {:class => "form"} do |f| %>
-
-    <% if f.error_messages != "" %><div class="alert alert-danger"><%= f.error_messages :header_message => "Your map couldn't be saved." %></div><% end %>
-
+    <% if @revision.errors.any? %>
+      <div class="alert alert-danger">
+        <h2><%= pluralize(@revision.errors.count, "error") %> prohibited this map from being saved:</h2>
+        <ul>
+        <% @revision.errors.full_messages.each do |msg| %>
+          <li><%= msg %></li>
+        <% end %>
+        </ul>
+      </div>
+    <% end %>
   <% end %>

   <%= form_for @node, :as => :drupal_node, :url => url, :html => {:class => "form well"} do |f| %>

-    <% if f.error_messages != "" %><div class="alert alert-danger"><%= f.error_messages :header_message => "Your map couldn't be saved." %></div><% end %>
+    <% if @node.errors.any? %>
+      <div class="alert alert-danger">
+        <h2><%= pluralize(@node.errors.count, "error") %> prohibited this map from being saved:</h2>
+        <ul>
+        <% @node.errors.full_messages.each do |msg| %>
+          <li><%= msg %></li>
+        <% end %>
+        </ul>
+      </div>
+    <% end %>

     <%= render :partial => "editor/main_image" %>

• [ ] 💾 Commit your changes

• [ ] 🔀 Start a Pull Request. There are two ways how you can start a pull request:

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• If you are familiar with the terminal or would like to learn to use it, here is a great tutorial on how to send a pull request using the terminal.

1. You can also edit files directly in your browser and open a pull request from there.

• [ ] 🏁 Done Ask in comments for a review :)

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🤔❓ Questions?

Leave a comment below!

[jywarren]

Hi, this is reserved for @Asu1996 to claim if wanted! If it is not claimed in 48 hours, others are welcome to claim it by leaving a comment here and linking to their pull request. Thank you!

[Nbde20]

Hi, can I work on this?

[ebarry]

Hi @Asu1996 , hope all is well 🌳. Are you on deck to do this issue? Please reply today to meet the 48 hours offer 💚 from @jywarren 2 days ago 😊

[mlcomeau]

Hello, first-time contributor here, can I work on this? Thanks!