<img src="/img/tutorial/generate-clients/image05.png">

## App de FastAPI con tags { #fastapi-app-with-tags }

En muchos casos tu app de FastAPI será más grande, y probablemente usarás tags para separar diferentes grupos de *path operations*.

Por ejemplo, podrías tener una sección para **items** y otra sección para **users**, y podrían estar separadas por tags:

{* ../../docs_src/generate_clients/tutorial002_py39.py hl[21,26,34] *}

				var and And
				if err = d.DecodeElement(&and, &se); err != nil {
					return err
				}
				f.And = and
				f.andSet = true
			case "Tag":
				var tag Tag
				if err = d.DecodeElement(&tag, &se); err != nil {
					return err
				}
				f.Tag = tag
				f.tagSet = true
			case "ObjectSizeLessThan":
				var sz int64
				if err = d.DecodeElement(&sz, &se); err != nil {
					return err
				}

<img src="/img/tutorial/generate-clients/image05.png">

## FastAPI App with Tags { #fastapi-app-with-tags }

In many cases, your FastAPI app will be bigger, and you will probably use tags to separate different groups of *path operations*.

For example, you could have a section for **items** and another section for **users**, and they could be separated by tags:

{* ../../docs_src/generate_clients/tutorial002_py39.py hl[21,26,34] *}

  /**
   * Returns the tag attached with [type] as a key, or null if no tag is attached with that key.
   *
   * The tags on a call are seeded from the [request tags][Request.tag]. This set will grow if new
   * tags are computed.
   */
  fun <T : Any> tag(type: KClass<T>): T?

  /**
   * Returns the tag attached with [type] as a key, or null if no tag is attached with that key.
   *

    val request =
      Request
        .Builder()
        .url("https://square.com")
        .tag(tag)
        .build()
    assertThat(request.tag()).isSameAs(tag)
    assertThat(request.tag(Any::class.java)).isSameAs(tag)
    assertThat(request.tag(UUID::class.java)).isNull()
    assertThat(request.tag(String::class.java)).isNull()

    // Alternate access APIs also work.

            <tag>
              <name>implSpec</name>
              <placement>X</placement>
            </tag>
            <tag>
              <name>jls</name>
              <placement>X</placement>
            </tag>
            <tag>
              <name>revised</name>
              <placement>X</placement>
            </tag>
            <tag>
              <name>spec</name>

	}

	for k, v := range tags {
		if string(removeSettingFromTag(reflect.StructTag(k), "column")) != v {
			t.Errorf("%v after removeSettingFromTag should equal %v, but got %v", k, v, removeSettingFromTag(reflect.StructTag(k), "column"))
		}
	}
}

func TestParseTagSettingWithDoubleQuoteEscape(t *testing.T) {
	tag := `gorm:"expression:to_tsvector('english', \"Name\")"`

		}
	}
}

func TestEmbeddedTagSetting(t *testing.T) {
	type Tag1 struct {
		Id int64 `gorm:"autoIncrement"`
	}
	type Tag2 struct {
		Id int64
	}

	type EmbeddedTag struct {
		Tag1 Tag1 `gorm:"Embedded;"`
		Tag2 Tag2 `gorm:"Embedded;EmbeddedPrefix:t2_"`
		Name string
	}

	DB.Migrator().DropTable(&EmbeddedTag{})

# computes a hash of a remote repo's tag state.
# Tag definitions can come from the .hgtags file stored in
# any head of any branch, and the server protocol does not
# expose the tags directly. However, the protocol does expose
# the hashes of all the branch heads, so we can use a hash of
# all those branch names and heads as a conservative snapshot
# of the entire remote repo state, and use that as the tag sum.

     */
    fun <T : Any> tag(
      type: KClass<T>,
      tag: T?,
    ): Builder =
      apply {
        tags = tags.plus(type, tag)
      }

    /** Attaches [tag] to the request using `Object.class` as a key. */
    open fun tag(tag: Any?): Builder = tag(Any::class, tag)

    /**
     * Attaches [tag] to the request using [type] as a key. Tags can be read from a