prevent update if template is in use

app/controllers/contract_templates_controller.rb

@@ -5,8 +5,9 @@ class ContractTemplatesController < ApplicationController
 
   layout 'project'
 
-  before_action :set_project, except: [:destroy, :edit]
-  before_action :set_contract_template, only: [:destroy, :edit]
+  before_action :set_project, except: [:destroy, :edit, :update]
+  before_action :set_contract_template, only: [:destroy, :edit, :update]
+  before_action :set_project_from_contract_template, only: [:edit, :update]
   before_action :show_splash_screen, only: :index
 
   def index
@@ -33,7 +34,21 @@ class ContractTemplatesController < ApplicationController
   end
 
   def edit
-    @project = @contract_template.project
+    @release_type = @contract_template.release_type
+  end
+
+  def update
+    unless @contract_template.editable?
+      redirect_to([@project, :contract_templates], alert: t('.error')) and return
+    end
+
+    @contract_template.attributes = contract_template_params
+
+    if @contract_template.save
+      redirect_to [@project, :contract_templates], notice: t('.notice')
+    else
+      render :edit
+    end
   end
 
   def destroy
@@ -43,6 +58,10 @@ class ContractTemplatesController < ApplicationController
 
   private
 
+  def set_project_from_contract_template
+    @project = @contract_template.project
+  end
+
   def show_splash_screen
     render :splash if contract_templates.non_archived.count.zero?
   end

app/models/contract_template.rb

@@ -69,9 +69,13 @@ class ContractTemplate < ApplicationRecord
     (1..NUMBER_OF_CUSTOM_FIELDS).any? { |n| public_send("question_#{n}_text").presence }
   end
 
+  def editable?
+    releases.size.zero?
+  end
+
   def attributes
     result = super()
-    result[:signature_legal_text] = signature_legal_text.as_json 
+    result[:signature_legal_text] = signature_legal_text.as_json
     result
   end
 end

app/policies/contract_template_policy.rb

@@ -27,6 +27,10 @@ class ContractTemplatePolicy < ApplicationPolicy
     create?
   end
 
+  def update?
+    edit?
+  end
+
   def import?
     if user.account_manager?
       record.project.account = user.account

app/views/contract_templates/_contract_template.html.erb

@@ -19,7 +19,7 @@
     <div class="btn-group">
       <%= button_tag t(".actions.manage"), class: "btn btn-light btn-sm dropdown-toggle border", data: { toggle: "dropdown", boundary: "window" }, aria: { haspopup: true, expanded: false } %>
       <div class="dropdown-menu dropdown-menu-right">
-        <% if policy(ContractTemplate).edit? %>
+        <% if policy(ContractTemplate).edit? && contract_template.editable? %>
           <%= link_to fa_icon("pencil fw", text: t(".actions.edit")), [:edit, contract_template], class: "dropdown-item" %>
         <% end %>
         <% if policy(QrCode).show? %>

app/views/contract_templates/_form.html.erb

@@ -1,4 +1,4 @@
-<%= bootstrap_form_with model: [project, contract_template], local: true do |form| %>
+<%= bootstrap_form_with model: contract_template, local: true do |form| %>
   <%= field_set_tag content_tag(:span, t(".release_info.heading"), class: "h6 text-muted text-uppercase") do %>
     <div class="form-row">
       <%= form.text_field :name, wrapper_class: "col-sm-6" %>

config/locales/en.yml

@@ -300,6 +300,9 @@ en:
         manage_large_audience: Easily manage large audiences with the crowd control feature
         print_QR_code: Print out release QR codes
         releases_automatically_organized: Releases are automatically organized as they’re submitted
+    update:
+      notice: The release template has been updated
+      error: The release template cannot be updated
   contracts:
     for_office_use_only:
       description_labels:

config/locales/es.yml

@@ -134,6 +134,9 @@ es:
         manage_large_audience: Easily manage large audiences with the crowd control feature (ES)
         print_QR_code: Print out release QR codes (ES)
         releases_automatically_organized: Releases are automatically organized as they’re submitted (ES)
+    update:
+      notice: The release template has been updated (ES)
+      error: The release template cannot be updated (ES)
   contracts:
     for_office_use_only:
       description_labels: