Zum Beispiel überprüft dieser benutzerdefinierte Validator, ob die Artikel-ID mit `isbn-` für eine <abbr title="ISBN bedeutet Internationale Standardbuchnummer">ISBN</abbr>-Buchnummer oder mit `imdb-` für eine <abbr title="IMDB (Internet Movie Database) ist eine Website mit Informationen über Filme">IMDB</abbr>-Film-URL-ID beginnt:

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py hl[5,16:19,24] *}

/// info | Info

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[25:30]  hl[25:27,30] *}

### Die Datenbanktabellen beim Start erstellen { #create-database-tables-on-startup }

Wir werden die Datenbanktabellen erstellen, wenn die Anwendung startet.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py hl[5,16:19,24] *}

/// info | Informação

package tests_test

import (
	"context"
	"database/sql"
	"fmt"
	"math/rand"
	"reflect"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"gorm.io/driver/gaussdb"
	"gorm.io/driver/postgres"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/migrator"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
	. "gorm.io/gorm/utils/tests"
)

func TestMigrate(t *testing.T) {

package tests_test

import (
	"database/sql"
	"database/sql/driver"
	"fmt"
	"reflect"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"testing"
	"time"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	. "gorm.io/gorm/utils/tests"
)

func TestFind(t *testing.T) {
	users := []User{
		*GetUser("find", Config{}),
		*GetUser("find", Config{}),
		*GetUser("find", Config{}),
	}

  </mime-type>
  <mime-type type="application/x-sas-fdb">
    <_comment>SAS FDB Consolidation Database File</_comment>
    <glob pattern="*.sf7"/>
    <glob pattern="*.sas7bfdb"/>
  </mime-type>
  <mime-type type="application/x-sas-mddb">
    <_comment>SAS MDDB Multi-Dimensional Database File</_comment>
    <glob pattern="*.sm7"/>
    <glob pattern="*.sas7bmdb"/>
  </mime-type>

    * Convert Python types (`str`, `int`, `float`, `bool`, `list`, etc).
    * `datetime` objects.
    * `UUID` objects.
    * Database models.
    * ...and many more.
* Automatic interactive API documentation, including 2 alternative user interfaces:
    * Swagger UI.
    * ReDoc.

---

 * completes before closing starts, rather than once it has finished.
 *
 * {@snippet :
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)

package gorm

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"reflect"
	"sort"
	"strings"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

type result struct {
	Result       sql.Result
	RowsAffected int64
}

func (info *result) ModifyStatement(stmt *Statement) {
	stmt.Result = info
}

// Build implements clause.Expression interface

package tests_test

import (
	"database/sql"
	"encoding/json"
	"reflect"
	"sort"
	"sync/atomic"
	"testing"

	"gorm.io/gorm"
)

func toJSONString(v interface{}) []byte {
	r, _ := json.Marshal(v)
	return r
}

func TestNestedPreload1(t *testing.T) {
	type (
		Level1 struct {
			ID       uint
			Value    string
			Level2ID uint
		}
		Level2 struct {
			ID       uint
			Level1   Level1