# JSON互換エンコーダ { #json-compatible-encoder }

データ型（Pydanticモデルのような）をJSONと互換性のあるもの（`dict`や`list`など）に変換する必要があるケースがあります。

例えば、データベースに保存する必要がある場合です。

そのために、**FastAPI** は`jsonable_encoder()`関数を提供しています。

## `jsonable_encoder`の使用 { #using-the-jsonable-encoder }

JSON互換のデータのみを受信するデータベース`fake_db`があるとしましょう。

例えば、`datetime`オブジェクトはJSONと互換性がないので、受け取られません。

そのため、`datetime`オブジェクトは[ISO形式](https://en.wikipedia.org/wiki/ISO_8601)のデータを含む`str`に変換されなければなりません。

                public int size() {
                    return 0;
                }
            };
        }
    };

    static <E1, E2 extends E1> List<E1> copy(Collection<E2> collection) {
        return collection == null ? List.of() : List.copyOf(collection);
    }

    static <K, V> Map<K, V> copy(Map<K, V> map) {
        if (map == null) {
            return emptyMap();

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.List;

import org.codelibs.fess.opensearch.config.exentity.DuplicateHost;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;

	Put(item I) (Key, error)
	PutMultiple(item []I) (Key, error)
	Get(key Key) (I, error)
	GetMultiple(key Key) ([]I, error)
	GetRaw(key Key) ([]byte, error)
	PutRaw(b []byte) (Key, error)
	Len() int
	List() []Key
	Del(key Key) error
	Open() error
	Delete() error
}

// Key denotes the key present in the store.
type Key struct {
	Name      string
	Compress  bool
	Extension string
	ItemCount int
}

            }
        }
        return event;
    }

    /**
     * Factory method to create an ErrorToWarnRewritePolicy instance.
     *
     * @param loggerNamePrefix comma-separated list of logger name prefixes
     * @return a new ErrorToWarnRewritePolicy instance
     */
    @PluginFactory
    public static ErrorToWarnRewritePolicy createPolicy(@PluginAttribute("loggers") final String loggerNamePrefix) {

 */
@Suppress("NewApi")
open class Jdk9Platform : Platform() {
  @SuppressSignatureCheck
  override fun configureTlsExtensions(
    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<@JvmSuppressWildcards Protocol>,
  ) {
    val sslParameters = sslSocket.sslParameters

    val names = alpnProtocolNames(protocols)

    sslParameters.applicationProtocols = names.toTypedArray()

        throw new UnsupportedOperationException();
    }

    @TaskAction
    final void executeTask() {
        AntBuilder ant = new AntBuilder()

        // remove existing loggers, we add our own
        List<BuildLogger> toRemove = new ArrayList<>();
        for (BuildListener listener : ant.project.getBuildListeners()) {
            if (listener instanceof BuildLogger) {
                toRemove.add(listener);
            }

of the configuration parameters used above - - `policies[].name` - name of the policy to create, must be a string with length > 0 - `policies[].statements[]` - list of statements, includes actions and resources - `policies[].statements[].resources[]` - list of resources that applies the statement - `policies[].statements[].actions[]` - list of actions granted ### Create user after install Install the chart, specifying the users you want to create after install: ```bash helm install --set users[0]...

of the configuration parameters used above - - `policies[].name` - name of the policy to create, must be a string with length > 0 - `policies[].statements[]` - list of statements, includes actions and resources - `policies[].statements[].resources[]` - list of resources that applies the statement - `policies[].statements[].actions[]` - list of actions granted ### Create user after install Install the chart, specifying the users you want to create after install: ```bash helm install --set users[0]...

of the configuration parameters used above - - `policies[].name` - name of the policy to create, must be a string with length > 0 - `policies[].statements[]` - list of statements, includes actions and resources - `policies[].statements[].resources[]` - list of resources that applies the statement - `policies[].statements[].actions[]` - list of actions granted ### Create user after install Install the chart, specifying the users you want to create after install: ```bash helm install --set users[0]...