Primeiro, certifique-se de criar seu [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, ativá-lo e, em seguida, instalar o `sqlmodel`:

<div class="termy">

```console
$ pip install sqlmodel
---> 100%
```

</div>

## Criar o App com um Único Modelo

Vamos criar a primeira versão mais simples do app com um único modelo **SQLModel**.

	for index := range buckets {
		g.Go(func() error {
			// Sleep and stagger to avoid blocked CPU and thundering
			// herd upon start up sequence.
			time.Sleep(25*time.Millisecond + time.Duration(rand.Int63n(int64(100*time.Millisecond))))

			_, _ = sys.objAPI.HealBucket(ctx, buckets[index], madmin.HealOpts{Recreate: true})
			meta, err := loadBucketMetadata(ctx, sys.objAPI, buckets[index])
			if err != nil {
				return err
			}

 * interrupted during such a call, the call continues to block until the result is available or the
 * timeout elapses, and only then re-interrupts the thread.
 *
 * @author Anthony Zana
 * @since 10.0
 */
@GwtCompatible
public final class Uninterruptibles {

  // Implementation Note: As of 3-7-11, the logic for each blocking/timeout
  // methods is identical, save for method being invoked.

// Provide a block size that affects latency. If 0 a default of 128KiB will be used.
// Block size can be up to 4MiB.
func newMetacacheWriter(out io.Writer, blockSize int) *metacacheWriter {
	if blockSize < 8<<10 {
		blockSize = 128 << 10
	}
	w := metacacheWriter{
		mw:        nil,
		blockSize: blockSize,
	}
	w.creator = func() error {
		s2w := s2.NewWriter(out, s2.WriterBlockSize(blockSize), s2.WriterConcurrency(2))

        });

        LaRequestUtil.getOptionalRequest().ifPresent(req -> {
            searchLog.setClientIp(StringUtils.abbreviate(ComponentUtil.getViewHelper().getClientIp(req), 100));
            searchLog.setReferer(StringUtils.abbreviate(req.getHeader("referer"), 1000));
            searchLog.setUserAgent(StringUtils.abbreviate(req.getHeader("user-agent"), 255));

    <!-- Override this with -Dtest.include="**/SomeTest.java" on the CLI -->
    <test.include>%regex[.*.class]</test.include>
    <truth.version>1.4.4</truth.version>
    <jspecify.version>1.0.0</jspecify.version>
    <errorprone.version>2.41.0</errorprone.version>
    <j2objc.version>3.1</j2objc.version>
    <project.build.outputTimestamp>2025-01-02T00:00:00Z</project.build.outputTimestamp>

    throw new InvalidObjectException("Use SerializedForm");
  }

  /**
   * Abstract base class for builders of {@link ImmutableCollection} types.
   *
   * @since 10.0
   */
  @DoNotMock
  public abstract static class Builder<E> {
    static final int DEFAULT_INITIAL_CAPACITY = 4;

    static int expandedCapacity(int oldCapacity, int minCapacity) {
      if (minCapacity < 0) {

    <!-- Override this with -Dtest.include="**/SomeTest.java" on the CLI -->
    <test.include>%regex[.*.class]</test.include>
    <truth.version>1.4.4</truth.version>
    <jspecify.version>1.0.0</jspecify.version>
    <errorprone.version>2.41.0</errorprone.version>
    <j2objc.version>3.1</j2objc.version>
    <project.build.outputTimestamp>2025-01-02T00:00:00Z</project.build.outputTimestamp>

Создайте виртуальное окружение [virtual environment](../virtual-environments.md){.internal-link target=_blank}, активируйте его и установите `sqlmodel`:

<div class="termy">

```console
$ pip install sqlmodel
---> 100%
```

</div>

## Создание приложения с единственной моделью

Мы начнем с создания наиболее простой первой версии нашего приложения с одной единственной моделью **SQLModel**.

const noEvictionTTL = time.Hour * 24 * 365 * 10

// because of uint8 usage for nextCleanupBucket, should not exceed 256.
// casting it as uint8 explicitly requires type conversions in multiple places
const numBuckets = 100

// NewLRU returns a new thread-safe cache with expirable entries.
//
// Size parameter set to 0 makes cache of unlimited size, e.g. turns LRU mechanism off.
//
// Providing 0 TTL turns expiring off.
//