### Generate a TypeScript Client with Tags { #generate-a-typescript-client-with-tags }

If you generate a client for a FastAPI app using tags, it will normally also separate the client code based on the tags.

This way, you will be able to have things ordered and grouped correctly for the client code:

<img src="/img/tutorial/generate-clients/image06.png">

In this case, you have:

First, write all your **FastAPI** application as normally:

{* ../../docs_src/extending_openapi/tutorial001.py hl[1,4,7:9] *}

### Generate the OpenAPI schema { #generate-the-openapi-schema }

Then, use the same utility function to generate the OpenAPI schema, inside a `custom_openapi()` function:

{* ../../docs_src/extending_openapi/tutorial001.py hl[2,15:21] *}

            assertTrue(generator.generate("test_id", outputFile));
        } finally {
            outputFile.delete();
        }
    }

    public void test_generate_outputFile_null() throws Exception {
        generator.setCommandList(Collections.singletonList("echo test"));
        try {
            generator.generate("test_id", null);
            fail("Should throw exception for null output file");

      </plugin>
      <plugin>
        <artifactId>maven-dependency-plugin</artifactId>
        <executions>
          <execution>
            <id>unpack-failureaccess-sources</id>
            <phase>generate-resources</phase>
            <goals><goal>unpack-dependencies</goal></goals>
            <configuration>
              <includeArtifactIds>failureaccess</includeArtifactIds>
              <classifier>sources</classifier>

    @Test
    @DisplayName("Should generate SMB3-compliant nonces with guaranteed uniqueness")
    void testSMB3CompliantNonceGeneration() {
        // Given - GCM cipher context
        Smb2EncryptionContext gcmContext = new Smb2EncryptionContext(EncryptionNegotiateContext.CIPHER_AES128_GCM, DialectVersion.SMB311,
                testEncryptionKey, testDecryptionKey);

        // When - Generate multiple nonces

        hmac.update(clientChallenge);
        hmac.digest(response, 0, 16);
        System.arraycopy(clientChallenge, 0, response, 16, 8);
        return response;
    }

    /**
     * Generate the Unicode MD4 hash for the password associated with these credentials.
     *
     * @param password the password to hash
     * @param challenge the server challenge bytes
     * @return the calculated response

          # For discussion, see the first setup-java block.
          # The generate-docs workflow doesn't run tests, so we don't have to care which version Maven would select for that step.
          # But we need Java 11 for JDiff.
          java-version: |
            11
            24
          distribution: 'temurin'
          cache: 'maven'
      - name: 'Generate latest docs'
        env:

    title: 'Zuplo: Deploy, Secure, Document, and Monetize your FastAPI'
    img: https://fastapi.tiangolo.com/img/sponsors/zuplo.png
  - url: https://liblab.com?utm_source=fastapi
    title: liblab - Generate SDKs from FastAPI
    img: https://fastapi.tiangolo.com/img/sponsors/liblab.png
  - url: https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi

The examples here use `.dict()` for compatibility with Pydantic v1, but you should use `.model_dump()` instead if you can use Pydantic v2.

///

That would generate a `dict` with only the data that was set when creating the `item` model, excluding default values.

Then you can use this to generate a `dict` with only the data that was set (sent in the request), omitting default values:

{* ../../docs_src/body_updates/tutorial002_py310.py hl[32] *}

It's relatively tightly coupled with relational databases (like MySQL or PostgreSQL), so, having a NoSQL database (like Couchbase, MongoDB, Cassandra, etc) as the main store engine is not very easy.

It was created to generate the HTML in the backend, not to create APIs used by a modern frontend (like React, Vue.js and Angular) or by other systems (like <abbr title="Internet of Things">IoT</abbr> devices) communicating with it.