/// warning | 警告

如果您觉得现在还用不到以下技术细节，可以先跳过下面的内容。

///

`RequestValidationError` 是 Pydantic 的 <a href="https://docs.pydantic.dev/latest/concepts/models/#error-handling" class="external-link" target="_blank">`ValidationError`</a> 的子类。

**FastAPI** 调用的就是 `RequestValidationError` 类，因此，如果在 `response_model` 中使用 Pydantic 模型，且数据有错误时，在日志中就会看到这个错误。

但客户端或用户看不到这个错误。反之，客户端接收到的是 HTTP 状态码为 `500` 的「内部服务器错误」。

from fastapi.exceptions import FastAPIDeprecationWarning
from fastapi.testclient import TestClient
from pydantic import BaseModel, ConfigDict


def create_app():
    app = FastAPI()

    class Item(BaseModel):
        data: str

        model_config = ConfigDict(
            json_schema_extra={"example": {"data": "Data in schema_extra"}}
        )

    @app.post("/schema_extra/")

import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder.FilterFunctionBuilder;

/**
 * @author ESFlute (using FreeGen)
 */
public abstract class BsScheduledJobCQ extends EsAbstractConditionQuery {

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================

import org.opensearch.search.aggregations.metrics.TopHitsAggregationBuilder;
import org.opensearch.search.aggregations.metrics.ValueCountAggregationBuilder;

/**
 * @author ESFlute (using FreeGen)
 */
public abstract class BsCrawlingInfoParamCA extends EsAbstractConditionAggregation {

    // ===================================================================================

    },
    "MetaUsr": {
      "X-Amz-Replication-Status": "REPLICA",
      "content-type": "application/octet-stream",
      "etag": "8315e643ed6a5d7c9962fc0a8ef9c11f",
      "x-amz-storage-class": "STANDARD"
    },
...
```

### Additional replication metadata for DeleteMarker

```
...
 {
      "DelObj": {
      "ID": "u8H5pYQFRMKgkIgkpSKIkQ==",
      "MTime": 1631843124147668389,

import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.Test

@Suppress("HttpUrlsUsage") // Don't warn if we should be using https://.
open class HttpUrlJvmTest {
  val platform = PlatformRule()

  /** This one's ugly: the HttpUrl's host is non-empty, but the URI's host is null. */
  @Test
  fun hostContainsOnlyStrippedCharacters() {

## What is "Dependency Injection" { #what-is-dependency-injection }

**"Dependency Injection"** means, in programming, that there is a way for your code (in this case, your *path operation functions*) to declare things that it requires to work and use: "dependencies".

And then, that system (in this case **FastAPI**) will take care of doing whatever is needed to provide your code with those needed dependencies ("inject" the dependencies).

import java.util.Iterator;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Files#simplifyPath}.
 *
 * @author Pablo Bellver
 */
@NullUnmarked
public class FilesSimplifyPathTest extends TestCase {

  public void testSimplifyEmptyString() {
    assertEquals(".", simplifyPath(""));
  }

  public void testSimplifyDot() {
    assertEquals(".", simplifyPath("."));
  }

 * Serves as the foundation for configuration implementations in the jCIFS library.
 *
 * @author mbechler
 */
public class BaseConfiguration implements Configuration {

    private static final Logger log = LoggerFactory.getLogger(BaseConfiguration.class);
    private static final Map<String, Integer> DEFAULT_BATCH_LIMITS = new HashMap<>();

    static {

 *
 * <p><b>Java 8+ users:</b> If you are not using any of the variance statistics, you may wish to use
 * built-in JDK libraries instead of this class.
 *
 * @author Pete Gillin
 * @author Kevin Bourrillion
 * @since 20.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class Stats implements Serializable {

  private final long count;
  private final double mean;
  private final double sumOfSquaresOfDeltas;