## Conditional OpenAPI from settings and env vars { #conditional-openapi-from-settings-and-env-vars }

You can easily use the same Pydantic settings to configure your generated OpenAPI and the docs UIs.

For example:

{* ../../docs_src/conditional_openapi/tutorial001.py hl[6,11] *}

	// Validate if bucket exists.
	objAPI := api.ObjectAPI()
	if objAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	vars := mux.Vars(r)
	bucketName := vars["bucket"]

	if bucketName == "" {
		if s3Error := checkRequestAuthType(ctx, r, policy.ListenNotificationAction, bucketName, ""); s3Error != ErrNone {

	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.SiteReplicationOperationAction)
	if objectAPI == nil {
		return
	}

	vars := mux.Vars(r)
	bucket := vars["bucket"]
	operation := madmin.BktOp(vars["operation"])

	var err error
	switch operation {
	default:
		err = errSRInvalidRequest(errInvalidArgument)
	case madmin.MakeWithVersioningBktOp:

			tx.Statement.AddClause(clause.Select{
				Distinct:   db.Statement.Distinct,
				Expression: clause.Expr{SQL: v, Vars: args},
			})
		} else if strings.Count(v, "@") > 0 && len(args) > 0 {
			tx.Statement.AddClause(clause.Select{
				Distinct:   db.Statement.Distinct,
				Expression: clause.NamedExpr{SQL: v, Vars: args},
			})
		} else {
			tx.Statement.Selects = []string{v}

			for _, arg := range args {

package callbacks

import (
	"gorm.io/gorm"
)

func RawExec(db *gorm.DB) {
	if db.Error == nil && !db.DryRun {
		result, err := db.Statement.ConnPool.ExecContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
		if err != nil {
			db.AddError(err)
			return
		}

		db.RowsAffected, _ = result.RowsAffected()

		if db.Statement.Result != nil {
			db.Statement.Result.Result = result

package schema

import (
	"gorm.io/gorm/clause"
)

// ConstraintInterface database constraint interface
type ConstraintInterface interface {
	GetName() string
	Build() (sql string, vars []interface{})
}

// GormDataTypeInterface gorm data type interface
type GormDataTypeInterface interface {
	GormDataType() string
}

// FieldNewValuePool field new scan value pool
type FieldNewValuePool interface {
	Get() interface{}

   * <i>adding</i> to the returned set is not possible.
   */
  @Override
  public Set<K> keySet() {
    return super.keySet();
  }

  /**
   * Returns a collection of all values in the multimap. Changes to the returned collection will
   * update the underlying multimap, and vice versa.
   *

          GITHUB_TOKEN: ${{ secrets.FASTAPI_PEOPLE }}
      - name: FastAPI People Experts
        run: python ./scripts/people.py
        env:
          GITHUB_TOKEN: ${{ secrets.FASTAPI_PEOPLE }}

	Migrator(db *DB) Migrator
	DataTypeOf(*schema.Field) string
	DefaultValueOf(*schema.Field) clause.Expression
	BindVarTo(writer clause.Writer, stmt *Statement, v interface{})
	QuoteTo(clause.Writer, string)
	Explain(sql string, vars ...interface{}) string
}

// Plugin GORM plugin interface
type Plugin interface {
	Name() string
	Initialize(*DB) error
}

type ParamsFilter interface {

		constraint, table := m.GuessConstraintInterfaceAndTable(stmt, name)
		if constraint != nil {
			vars := []interface{}{clause.Table{Name: table}}
			if stmt.TableExpr != nil {
				vars[0] = stmt.TableExpr
			}
			sql, values := constraint.Build()
			return m.DB.Exec("ALTER TABLE ? ADD "+sql, append(vars, values...)...).Error
		}
		return nil
	})
}

// DropConstraint drop constraint