Shows min password length on edit password view.

app/controllers/devise/passwords_controller.rb

@@ -23,6 +23,10 @@ class Devise::PasswordsController < DeviseController
   # GET /resource/password/edit?reset_password_token=abcdef
   def edit
     self.resource = resource_class.new
+    @validatable = devise_mapping.validatable?
+    if @validatable
+      @minimum_password_length = resource_class.password_length.min
+    end
     resource.reset_password_token = params[:reset_password_token]
   end
 

app/views/devise/passwords/edit.html.erb

@@ -6,6 +6,9 @@
 
   <div class="field">
     <%= f.label :password, "New password" %><br />
+    <% if @validatable %>
+    <em>(<%= @minimum_password_length %> characters minimum)</em>
+    <% end %><br />
     <%= f.password_field :password, autofocus: true, autocomplete: "off" %>
   </div>
 

lib/generators/templates/simple_form_for/passwords/edit.html.erb

@@ -7,7 +7,7 @@
   <%= f.full_error :reset_password_token %>
 
   <div class="form-inputs">
-    <%= f.input :password, label: "New password", required: true, autofocus: true %>
+    <%= f.input :password, label: "New password", required: true, hint: ("#{@minimum_password_length} characters minimum" if @validatable) %>
     <%= f.input :password_confirmation, label: "Confirm your new password", required: true %>
   </div>