Force the conan package presenter to read conan only packages

By using the `.conan` scope on `Packages::Package`.
This will avoid the presenter to read a package with an exact
same name + version of a different package type.

Rename the `Packages::PackageFile.with_conan_file_metadata` scope to
`Packages::PackageFile.preload_conan_file_metadata` to better reflect
what the scope is doing (eager loading instead of filtering).

ee/app/models/packages/package_file.rb

@@ -20,7 +20,7 @@ class Packages::PackageFile < ApplicationRecord
   scope :with_file_name, ->(file_name) { where(file_name: file_name) }
   scope :with_file_name_like, ->(file_name) { where(arel_table[:file_name].matches(file_name)) }
   scope :with_files_stored_locally, -> { where(file_store: ::Packages::PackageFileUploader::Store::LOCAL) }
-  scope :with_conan_file_metadata, -> { includes(:conan_file_metadatum) }
+  scope :preload_conan_file_metadata, -> { preload(:conan_file_metadatum) }
 
   scope :with_conan_file_type, ->(file_type) do
     joins(:conan_file_metadatum)

ee/app/presenters/packages/conan/package_presenter.rb

@@ -86,14 +86,19 @@ module Packages
       def package_files
         return unless package
 
-        @package_files ||= package.package_files.with_conan_file_metadata
+        @package_files ||= package.package_files.preload_conan_file_metadata
       end
 
       def package
         strong_memoize(:package) do
           name, version = @recipe.split('@')[0].split('/')
 
-          @project.packages.with_name(name).with_version(version).order_created.last
+          @project.packages
+                  .conan
+                  .with_name(name)
+                  .with_version(version)
+                  .order_created
+                  .last
         end
       end
 

ee/changelogs/unreleased/225860-fix-packages-scope-in-conan-package-presenter.yml

+---
+title: The conan package presenter will now only read conan packages
+merge_request: 35971
+author:
+type: fixed

ee/spec/presenters/packages/conan/package_presenter_spec.rb

@@ -7,6 +7,16 @@ RSpec.describe ::Packages::Conan::PackagePresenter do
   let_it_be(:project) { create(:project) }
   let_it_be(:conan_package_reference) { '123456789'}
 
+  RSpec.shared_examples 'not selecting a package with the wrong type' do
+    context 'with a nuget package with same name and version' do
+      let_it_be(:wrong_package) { create(:nuget_package, name: 'wrong', version: '1.0.0', project: project) }
+
+      let(:recipe) { "#{wrong_package.name}/#{wrong_package.version}" }
+
+      it { is_expected.to be_empty }
+    end
+  end
+
   describe '#recipe_urls' do
     subject { described_class.new(recipe, user, project).recipe_urls }
 
@@ -16,6 +26,8 @@ RSpec.describe ::Packages::Conan::PackagePresenter do
       it { is_expected.to be_empty }
     end
 
+    it_behaves_like 'not selecting a package with the wrong type'
+
     context 'existing package' do
       let(:package) { create(:conan_package, project: project) }
       let(:recipe) { package.conan_recipe }
@@ -40,6 +52,8 @@ RSpec.describe ::Packages::Conan::PackagePresenter do
       it { is_expected.to be_empty }
     end
 
+    it_behaves_like 'not selecting a package with the wrong type'
+
     context 'existing package' do
       let(:package) { create(:conan_package, project: project) }
       let(:recipe) { package.conan_recipe }
@@ -70,6 +84,8 @@ RSpec.describe ::Packages::Conan::PackagePresenter do
       it { is_expected.to be_empty }
     end
 
+    it_behaves_like 'not selecting a package with the wrong type'
+
     context 'existing package' do
       let(:package) { create(:conan_package, project: project) }
       let(:recipe) { package.conan_recipe }
@@ -139,6 +155,8 @@ RSpec.describe ::Packages::Conan::PackagePresenter do
       it { is_expected.to be_empty }
     end
 
+    it_behaves_like 'not selecting a package with the wrong type'
+
     context 'existing package' do
       let(:package) { create(:conan_package, project: project) }
       let(:recipe) { package.conan_recipe }