Fields: []schema.IndexOption{{
				Field: &schema.Field{Name: "Data1A"},
			}, {
				Field: &schema.Field{Name: "Data1B"},
			}, {
				Field: &schema.Field{Name: "Data1C"},
			}},
		},
		{
			Name:  "idx_user_indices_comp_id2",
			Class: "UNIQUE",
			Fields: []schema.IndexOption{{
				Field: &schema.Field{Name: "Data2C"},
			}, {
				Field: &schema.Field{Name: "Data2A"},
			}, {

	}

	checkUserSchema(t, user)
}

func checkUserSchema(t *testing.T, user *schema.Schema) {
	// check schema
	checkSchema(t, user, &schema.Schema{Name: "User", Table: "users"}, []string{"ID"})

	// check fields
	fields := []schema.Field{

                                "schema": {}
                            }
                        }
                    }
                },
                "x-aperture-labs-portal": "blue"
            }
        }
    }
}
```

### Custom OpenAPI *path operation* schema { #custom-openapi-path-operation-schema }

**FastAPI** 會取用該模型、產生其 JSON Schema，並把它放到 OpenAPI 中正確的位置。

例如，要宣告一個狀態碼為 `404` 的額外回應，並使用 Pydantic 模型 `Message`，你可以這樣寫：

{* ../../docs_src/additional_responses/tutorial001_py310.py hl[18,22] *}

/// note | 注意

請記住你必須直接回傳 `JSONResponse`。

///

/// info | 說明

`model` 這個鍵不屬於 OpenAPI。

**FastAPI** 會從這裡取出 Pydantic 模型，產生 JSON Schema，並放到正確位置。

正確的位置是：

                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

	"reflect"
	"sync"
	"testing"

	"gorm.io/gorm"
	"gorm.io/gorm/schema"
)

type UserWithCallback struct{}

func (UserWithCallback) BeforeSave(*gorm.DB) error {
	return nil
}

func (UserWithCallback) AfterCreate(*gorm.DB) error {
	return nil
}

func TestCallback(t *testing.T) {
	user, err := schema.Parse(&UserWithCallback{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {

                                "required": True,
                                "schema": {"title": "Item Id", "type": "string"},
                                "name": "item_id",
                                "in": "path",
                            },
                            {
                                "required": False,
                                "schema": {

	syncMap := &sync.Map{}
	for i := 0; i < 10; i++ {
		go func() {
			schema.Parse(&Info1{}, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()

		go func() {
			schema.Parse(&Info2{}, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()

		go func() {
			var result User
			schema.Parse(&result, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()
		go func() {

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

var schemaCache = &sync.Map{}

func TestConvertToCreateValues_DestType_Slice(t *testing.T) {
	type user struct {
		ID    int `gorm:"primaryKey"`
		Name  string
		Email string `gorm:"default:(-)"`
		Age   int    `gorm:"default:(-)"`
	}

	s, err := schema.Parse(&user{}, schemaCache, schema.NamingStrategy{})
	if err != nil {

					for _, field := range stmt.Schema.PrimaryFields {
						_, isZero = field.ValueOf(stmt.Context, stmt.ReflectValue.Index(i))
						if !isZero {
							break
						}
					}
				}

				if !isZero {
					_, primaryValues := schema.GetIdentityFieldValuesMap(stmt.Context, stmt.ReflectValue, stmt.Schema.PrimaryFields)
					column, values := schema.ToQueryValues("", stmt.Schema.PrimaryFieldDBNames, primaryValues)