# Templates

Sie können jede gewünschte Template-Engine mit **FastAPI** verwenden.

Eine häufige Wahl ist Jinja2, dasselbe, was auch von Flask und anderen Tools verwendet wird.

Es gibt Werkzeuge zur einfachen Konfiguration, die Sie direkt in Ihrer **FastAPI**-Anwendung verwenden können (bereitgestellt von Starlette).

## Abhängigkeiten installieren

Installieren Sie `jinja2`:

<div class="termy">

```console
$ pip install jinja2

/// tip | "Tipp"

Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="7"
{!> ../../docs_src/request_forms/tutorial001.py!}
```

////

Zum Beispiel stellt eine der Möglichkeiten, die OAuth2 Spezifikation zu verwenden (genannt <abbr title='„Passwort-Fluss“'>„password flow“</abbr>), die Bedingung, einen `username` und ein `password` als Formularfelder zu senden.

Zum Beispiel könnte der Projektgenerator <a href="https://github.com/tiangolo/full-stack-fastapi-postgresql" class="external-link" target="_blank">Full Stack FastAPI PostgreSQL</a> eine bessere Alternative sein, da er aktiv gepflegt und genutzt wird. Und er enthält alle neuen Funktionen und Verbesserungen.

3. Bring down couple of MinIO instances to bring down the Erasure Set tolerance to -1 and verify the same with `mc admin prometheus metrics ALIAS | grep minio_cluster_health_erasure_set_status`
4. Wait for 5 mins (as alert is configured to be firing after 5 mins), and verify that you see an entry in webhook for the alert as well as in Prometheus console as shown below

```json
{
  "receiver": "web\\.hook",
  "status": "firing",
  "alerts": [
    {

	ErrSyntax        = DecoderError{msg: "invalid character"}
	ErrUnexpectedEOF = DecoderError{msg: "unexpected end of JSON input"}
	ErrMaxDepth      = DecoderError{msg: "maximum recursion depth exceeded"}
)

type errPos [2]int // line number, byte offset where error occurred

// DecoderError contains a detailed decoding error.
type DecoderError struct {
	msg       string // description of error
	context   string // additional error context

          # the end of the line.
          # See https://cloud.google.com/architecture/using-container-images#exploring_image_manifests_digests_and_tags
          echo -n "Trying to map name $1 to tag $2... "
          digest=$(curl -s --head "https://gcr.io/v2/tensorflow-sigs/build/manifests/$2" | egrep -o "sha256:[[:alnum:]]*")
          # Find the line matching the regex "sigbuild-r2.9" (with quotes) and

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  4096;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '

cookies and headers), and will put them in the final response that contains the value you returned, filtered by any `response_model`.

You can also declare the `Response` parameter in dependencies, and set the status code in them. But keep in mind that the last one to be set will win....

# 
# Example:
# map:{
#     ; PURCHASE     = SEQ_PURCHASE
#     ; MEMBER       = SEQ_MEMBER
#     ; MEMBER_LOGIN = SEQ_MEMBER_LOGIN
#     ; PRODUCT      = SEQ_PRODUCT
# }
#
# *The line that starts with '#' means comment-out.
#
map:{
    #; PURCHASE     = SEQ_PURCHASE
    #; MEMBER       = SEQ_MEMBER
    #; MEMBER_LOGIN = SEQ_MEMBER_LOGIN
    #; PRODUCT      = SEQ_PRODUCT
}

#     }
#     ; beforeUpdateMap = map:{
#         ; UPDATE_DATETIME   = $$AccessContext$$.getAccessLocalDateTimeOnThread()
#         ; UPDATE_USER       = $$AccessContext$$.getAccessUserOnThread()
#     }
# }
#
# *The line that starts with '#' means comment-out.
#
map:{
    #; commonColumnMap = map:{
    #    ; REGISTER_DATETIME=TIMESTAMP ; REGISTER_USER=VARCHAR
    #    ; UPDATE_DATETIME=TIMESTAMP   ; UPDATE_USER=VARCHAR
    #}