mergeMetadata(versions, repoMetadata, repository);
            } catch (IOException e) {
                invalidMetadata(session, trace, metadata, repository, e);
            }
        }
    }

    private void invalidMetadata(
            RepositorySystemSession session,
            RequestTrace trace,
            org.eclipse.aether.metadata.Metadata metadata,
            ArtifactRepository repository,

 *     <li>{@linkplain Project#getPomArtifact() the project POM artifact}</li>
 *     <li>{@linkplain Project#getMainArtifact() the main artifact}</li>
 *     <li>{@linkplain org.apache.maven.api.services.ProjectManager#attachArtifact(Session, Project, Path) artifacts to be attached to a project}</li>
 * </ul>
 *
 * <p>For the main artifact and attached artifacts, the
 * {@link org.apache.maven.api.services.ArtifactManager ArtifactManager} service must be used

#    credentials:
#      accessKey: minioadmin # Required
#      secretKey: minioadmin # Required
#    # sessionToken: SESSION-TOKEN # Optional only available when rotating credentials are used
    snowball: # automatically activated if the source is local
      disable: true # optionally turn-off snowball archive transfer

### Create a Session Dependency { #create-a-session-dependency }

A **`Session`** is what stores the **objects in memory** and keeps track of any changes needed in the data, then it **uses the `engine`** to communicate with the database.

We will create a FastAPI **dependency** with `yield` that will provide a new `Session` for each request. This is what ensures that we use a single session per request. 🤓

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[21:22] hl[21:22] *}

### Eine Session-Abhängigkeit erstellen { #create-a-session-dependency }

Eine <abbr title="Sitzung">**`Session`**</abbr> speichert die **Objekte im Speicher** und verfolgt alle Änderungen, die an den Daten vorgenommen werden müssen, dann **verwendet sie die `engine`**, um mit der Datenbank zu kommunizieren.

          persist-credentials: false

      - name: Prepare Mimir for Maven 3.x
        shell: bash
        run: |
          mkdir -p ${{ env.MIMIR_BASEDIR }}
          cp .github/ci-mimir-session.properties ${{ env.MIMIR_BASEDIR }}/session.properties
          cp .github/ci-mimir-daemon.properties ${{ env.MIMIR_BASEDIR }}/daemon.properties
          cp .github/ci-extensions.xml .mvn/extensions.xml

      - name: Restore Mimir caches

    MavenMixedDependenciesValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected void doValidate(
            RepositorySystemSession session,
            Artifact pluginArtifact,
            ArtifactDescriptorResult artifactDescriptorResult) {
        Set<String> mavenVersions = artifactDescriptorResult.getDependencies().stream()

 * <p>
 * The cache behavior is determined by the cache retention specified in the request's metadata.
 * Results can be cached at different policies (forever, session, request, or not at all)
 * based on the {@link CacheRetention} associated with the request.
 *
 * @since 4.0.0
 * @see CacheMetadata
 * @see RequestCacheFactory
 */
@Experimental
public interface RequestCache {

			case schema.HasOne, schema.HasMany:
				queryConds := rel.ToQueryConditions(db.Statement.Context, db.Statement.ReflectValue)
				modelValue := reflect.New(rel.FieldSchema.ModelType).Interface()
				tx := db.Session(&gorm.Session{NewDB: true}).Model(modelValue)
				withoutConditions := false
				if db.Statement.Unscoped {
					tx = tx.Unscoped()
				}

				if len(db.Statement.Selects) > 0 {

func TestPreloadGoroutine(t *testing.T) {
	var wg sync.WaitGroup

	wg.Add(10)
	for i := 0; i < 10; i++ {
		go func() {
			defer wg.Done()
			var user2 []User
			tx := DB.Where("id = ?", 1).Session(&gorm.Session{})

			if err := tx.Preload("Team").Find(&user2).Error; err != nil {
				t.Error(err)
			}
		}()
	}
	wg.Wait()
}

func TestPreloadWithDiffModel(t *testing.T) {