Use attach method for has many attachments

Gemfile.lock

@@ -1,84 +1,84 @@
 PATH
   remote: .
   specs:
-    trestle-active_storage (3.0.1)
-      rails (>= 5.2, < 8)
-      trestle (~> 0.9.0, >= 0.9.3)
+    trestle-active_storage (3.1.0)
+      rails (>= 6, < 8)
+      trestle (~> 0.9, >= 0.9.3)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actioncable (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      activejob (= 7.0.4.1)
-      activerecord (= 7.0.4.1)
-      activestorage (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actionmailbox (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activejob (= 7.0.4.3)
+      activerecord (= 7.0.4.3)
+      activestorage (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       mail (>= 2.7.1)
       net-imap
       net-pop
       net-smtp
-    actionmailer (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      actionview (= 7.0.4.1)
-      activejob (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actionmailer (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      actionview (= 7.0.4.3)
+      activejob (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       mail (~> 2.5, >= 2.5.4)
       net-imap
       net-pop
       net-smtp
       rails-dom-testing (~> 2.0)
-    actionpack (7.0.4.1)
-      actionview (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actionpack (7.0.4.3)
+      actionview (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       rack (~> 2.0, >= 2.2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      activerecord (= 7.0.4.1)
-      activestorage (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actiontext (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activerecord (= 7.0.4.3)
+      activestorage (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (7.0.4.1)
-      activesupport (= 7.0.4.1)
+    actionview (7.0.4.3)
+      activesupport (= 7.0.4.3)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (7.0.4.1)
-      activesupport (= 7.0.4.1)
+    activejob (7.0.4.3)
+      activesupport (= 7.0.4.3)
       globalid (>= 0.3.6)
-    activemodel (7.0.4.1)
-      activesupport (= 7.0.4.1)
-    activerecord (7.0.4.1)
-      activemodel (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
-    activestorage (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      activejob (= 7.0.4.1)
-      activerecord (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    activemodel (7.0.4.3)
+      activesupport (= 7.0.4.3)
+    activerecord (7.0.4.3)
+      activemodel (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
+    activestorage (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activejob (= 7.0.4.3)
+      activerecord (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       marcel (~> 1.0)
       mini_mime (>= 1.1.0)
-    activesupport (7.0.4.1)
+    activesupport (7.0.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
     builder (3.2.4)
-    concurrent-ruby (1.1.10)
+    concurrent-ruby (1.2.2)
     crass (1.0.6)
     date (3.3.3)
     erubi (1.12.0)
-    globalid (1.0.1)
+    globalid (1.1.0)
       activesupport (>= 5.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
@@ -97,16 +97,15 @@ GEM
     loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.8.0.1)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
       net-imap
       net-pop
       net-smtp
     marcel (1.0.2)
     method_source (1.0.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.1)
-    minitest (5.17.0)
+    minitest (5.18.0)
     net-imap (0.3.4)
       date
       net-protocol
@@ -117,35 +116,34 @@ GEM
     net-smtp (0.3.3)
       net-protocol
     nio4r (2.5.8)
-    nokogiri (1.14.0)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.14.2-x86_64-darwin)
       racc (~> 1.4)
     racc (1.6.2)
-    rack (2.2.6.2)
-    rack-test (2.0.2)
+    rack (2.2.6.4)
+    rack-test (2.1.0)
       rack (>= 1.3)
-    rails (7.0.4.1)
-      actioncable (= 7.0.4.1)
-      actionmailbox (= 7.0.4.1)
-      actionmailer (= 7.0.4.1)
-      actionpack (= 7.0.4.1)
-      actiontext (= 7.0.4.1)
-      actionview (= 7.0.4.1)
-      activejob (= 7.0.4.1)
-      activemodel (= 7.0.4.1)
-      activerecord (= 7.0.4.1)
-      activestorage (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    rails (7.0.4.3)
+      actioncable (= 7.0.4.3)
+      actionmailbox (= 7.0.4.3)
+      actionmailer (= 7.0.4.3)
+      actionpack (= 7.0.4.3)
+      actiontext (= 7.0.4.3)
+      actionview (= 7.0.4.3)
+      activejob (= 7.0.4.3)
+      activemodel (= 7.0.4.3)
+      activerecord (= 7.0.4.3)
+      activestorage (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       bundler (>= 1.15.0)
-      railties (= 7.0.4.1)
+      railties (= 7.0.4.3)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.5.0)
       loofah (~> 2.19, >= 2.19.1)
-    railties (7.0.4.1)
-      actionpack (= 7.0.4.1)
-      activesupport (= 7.0.4.1)
+    railties (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       method_source
       rake (>= 12.2)
       thor (~> 1.0)
@@ -159,18 +157,18 @@ GEM
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     thor (1.2.1)
-    timeout (0.3.1)
+    timeout (0.3.2)
     trestle (0.9.7)
       activemodel (>= 4.2.0)
       kaminari (>= 1.1.0)
       railties (>= 4.2.0)
       sprockets-rails (>= 2.0.0)
-    tzinfo (2.0.5)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.6.6)
+    zeitwerk (2.6.7)
 
 PLATFORMS
   ruby
@@ -179,4 +177,4 @@ DEPENDENCIES
   trestle-active_storage!
 
 BUNDLED WITH
-   1.16.1
+   2.1.2

app/views/trestle/active_storage/_has_many_field.html.erb

@@ -10,11 +10,13 @@
             <% elsif attachment.variable? %>
               <%= link_to image_tag(main_app.url_for(attachment.variant(resize_to_limit: [300, 300])), class: "active-storage__image"),
                           main_app.rails_blob_path(attachment, disposition: "attachment") %>
-            <% elsif attachment.persisted? %>
+            <% else %>
               <%= link_to main_app.rails_blob_path(attachment, disposition: "attachment"), class: "btn btn-info" do %>
                 <i class="fa fa-download"></i>
                 <span class="btn-label">Download <%= field_name %></span>
               <% end %>
+            <% end %>
+            <% if attachment.persisted? %>
               <div>
                 <small><%= attachment.blob.filename %></small>
                 <%= builder.check_box("delete_#{field_name}_#{attachment.blob_id.to_s.gsub('-', '')}", label: "Delete this #{field_name.to_s.singularize}") %>

lib/trestle/active_storage/controller_concern.rb

@@ -5,10 +5,33 @@ module ControllerConcern
 
       included do
         before_action :define_attachment_accessors, only: [:show, :edit, :update, :destroy]
+        before_action :filter_has_many_attachments, only: [:update]
         after_action :purge_attachments, only: [:update]
+        after_action :attach_attachments, only: [:update]
       end
 
       private
+      def filter_has_many_attachments
+        return if admin.active_storage_fields.empty?
+
+        @removed_attachments = Hash.new
+        admin.active_storage_fields.each do |field|
+          if instance.send(field).respond_to?(:each)
+            if params.key?(admin.parameter_name)
+              @removed_attachments[field] = params[admin.parameter_name].delete field.to_sym
+            end
+          end
+        end
+      end
+
+      def attach_attachments
+        return if @removed_attachments.nil? || @removed_attachments.empty?
+
+        @removed_attachments.each do |field, attachments|
+          instance.send(field).attach(attachments)
+        end
+      end
+
         def define_attachment_accessors
           self.instance = admin.find_instance(params)
 

lib/trestle/active_storage/version.rb

@@ -1,5 +1,5 @@
 module Trestle
   module ActiveStorage
-    VERSION = '3.0.1'
+    VERSION = '3.1.0'
   end
 end

trestle-active_storage.gemspec

@@ -17,6 +17,6 @@ Gem::Specification.new do |s|
   s.files = Dir['{app,config,db,lib}/**/*', 'MIT-LICENSE', 'Rakefile', 'README.md']
   s.require_paths = ['lib']
 
-  s.add_dependency 'rails', '>= 5.2', '< 8'
-  s.add_dependency "trestle", "~> 0.9.0", ">= 0.9.3"
+  s.add_dependency 'rails', '>= 6', '< 8'
+  s.add_dependency "trestle", "~> 0.9", ">= 0.9.3"
 end