### 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.

Dieses Verhalten wurde in 0.118.0 zurückgenommen, sodass der Exit-Code nach `yield` ausgeführt wird, nachdem die Response gesendet wurde.

/// info | Info

 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

                messageBuilderFactory);
    }

    @Override
    public void execute(MavenSession session, List<MojoExecution> mojoExecutions) throws LifecycleExecutionException {
        executions.addAll(mojoExecutions);
    }

    @Override
    public List<MavenProject> executeForkedExecutions(MojoExecution mojoExecution, MavenSession session)
            throws LifecycleExecutionException {
        return null;
    }

     * @param extendedSecurity true to enable extended security
     */
    void setExtendedSecurity(boolean extendedSecurity);

    /**
     * Sets the session ID.
     *
     * @param sessionId the session ID to set
     */
    void setSessionId(long sessionId);

    /**
     * Resets this message to its initial state.
     */
    void reset();

// during or after this call (and the session drops its reference to the
// corresponding graph).
TF_CAPI_EXPORT extern void TF_DeleteSession(TF_Session*, TF_Status* status);

// Run the graph associated with the session starting with the supplied inputs
// (inputs[0,ninputs-1] with corresponding values in input_values[0,ninputs-1]).
//

     * @throws CIFSException if authentication fails
     */
    byte[] authenticate(CIFSContext context, byte[] challenge) throws CIFSException;

    /**
     * Gets the session key after successful authentication
     *
     * @return the session key or null if not available
     */
    byte[] getSessionKey();

    /**
     * Gets the signing key for SMB2/3
     *
     * @return the signing key or null if not available

 * operations during SMB authentication.
 *
 * @author mbechler
 */
public interface SSPContext {

    /**
     * Gets the signing key for the session.
     * @return the signing key for the session
     * @throws CIFSException if an error occurs retrieving the signing key
     */
    byte[] getSigningKey() throws CIFSException;

    /**

### Создание зависимости Session { #create-a-session-dependency }

**`Session`** хранит **объекты в памяти** и отслеживает необходимые изменения в данных, затем **использует `engine`** для общения с базой данных.

Мы создадим **зависимость** FastAPI с `yield`, которая будет предоставлять новую `Session` для каждого запроса. Это и обеспечивает использование одной сессии на запрос. 🤓