field

package
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 Go to latest Published: Oct 24, 2024 License: Apache-2.0 Imports: 11 Imported by: 108

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Any 

func Any(name string) *jsonBuilder

Any returns a new JSON Field with type any. Although this field type can be useful for fields with dynamic data layout, it is strongly recommended to use JSON with json.RawMessage instead and implement custom marshaling.

func Bool 

func Bool(name string) *boolBuilder

Bool returns a new Field with type bool.

func Bytes 

func Bytes(name string) *bytesBuilder

Bytes returns a new Field with type bytes/buffer. In MySQL and SQLite, it is the "BLOB" type, and it does not support for Gremlin.

func Enum 

func Enum(name string) *enumBuilder

Enum returns a new Field with type enum. An example for defining enum is as follows: 

field.Enum("state").
	Values(
		"on",
		"off",
	).
	Default("on")

func Float 

func Float(name string) *float64Builder

Float returns a new Field with type float64.

func Float32 

func Float32(name string) *float32Builder

Float32 returns a new Field with type float32.

func Floats 

func Floats(name string) *sliceBuilder[float64]

Floats returns a new JSON Field with type []float.

func Int 

func Int(name string) *intBuilder

Int returns a new Field with type int.

func Int16 

func Int16(name string) *int16Builder

Int16 returns a new Field with type int16.

func Int32 

func Int32(name string) *int32Builder

Int32 returns a new Field with type int32.

func Int64 

func Int64(name string) *int64Builder

Int64 returns a new Field with type int64.

func Int8 

func Int8(name string) *int8Builder

Int8 returns a new Field with type int8.

func Ints 

func Ints(name string) *sliceBuilder[int]

Ints returns a new JSON Field with type []int.

func JSON 

func JSON(name string, typ any) *jsonBuilder

JSON returns a new Field with type json that is serialized to the given object. For example: 

field.JSON("dirs", []http.Dir{}).
	Optional()

field.JSON("info", &Info{}).
	Optional()

func Other 

func Other(name string, typ driver.Valuer) *otherBuilder

Other represents a field that is not a good fit for any of the standard field types.

The second argument defines the GoType and must implement the ValueScanner interface. The SchemaType option must be set because the field type cannot be inferred. An example for defining Other field is as follows: 

field.Other("link", &Link{}).
	SchemaType(map[string]string{
		dialect.MySQL:    "text",
		dialect.Postgres: "varchar",
	})

func String 

func String(name string) *stringBuilder

String returns a new Field with type string.

func Strings 

func Strings(name string) *sliceBuilder[string]

Strings returns a new JSON Field with type []string.

func Text 

func Text(name string) *stringBuilder

Text returns a new string field without limitation on the size. In MySQL, it is the "longtext" type, but in SQLite and Gremlin it has no effect.

func Time 

func Time(name string) *timeBuilder

Time returns a new Field with type timestamp.

func UUID 

func UUID(name string, typ driver.Valuer) *uuidBuilder

UUID returns a new Field with type UUID. An example for defining UUID field is as follows: 

field.UUID("id", uuid.New())

func Uint 

func Uint(name string) *uintBuilder

Uint returns a new Field with type uint.

func Uint16 

func Uint16(name string) *uint16Builder

Uint16 returns a new Field with type uint16.

func Uint32 

func Uint32(name string) *uint32Builder

Uint32 returns a new Field with type uint32.

func Uint64 

func Uint64(name string) *uint64Builder

Uint64 returns a new Field with type uint64.

func Uint8 

func Uint8(name string) *uint8Builder

Uint8 returns a new Field with type uint8.

Types

type Annotation 

type Annotation struct {
	// The StructTag option allows overriding the struct-tag
	// of the fields in the generated entity. For example:
	//
	//	field.Annotation{
	//		StructTag: map[string]string{
	//			"id": `json:"id,omitempty" yaml:"-"`,
	//		},
	//	}
	//
	StructTag map[string]string

	// ID defines a multi-field schema identifier. Note,
	// the annotation is valid only for edge schemas.
	//
	//	func (TweetLike) Annotations() []schema.Annotation {
	//		return []schema.Annotation{
	//			field.ID("user_id", "tweet_id"),
	//		}
	//	}
	//
	ID []string
}

Annotation is a builtin schema annotation for configuring the schema fields in codegen.

func ID 

func ID(first, second string, fields ...string) *Annotation

ID defines a multi-field schema identifier. Note, the annotation is valid only for edge schemas. 

func (TweetLike) Annotations() []schema.Annotation {
	return []schema.Annotation{
		field.ID("user_id", "tweet_id"),
	}
}

func (Annotation) Merge 

func (a Annotation) Merge(other schema.Annotation) schema.Annotation

Merge implements the schema.Merger interface.

func (Annotation) Name 

func (Annotation) Name() string

Name describes the annotation name.

type BinaryValueScanner 

type BinaryValueScanner[T interface {
	encoding.BinaryMarshaler
	encoding.BinaryUnmarshaler
}] struct{}

BinaryValueScanner returns a new TypeValueScanner that calls MarshalBinary for storing values in the database, and calls UnmarshalBinary for scanning database values into struct fields.

func (BinaryValueScanner[T]) FromValue 

func (BinaryValueScanner[T]) FromValue(v driver.Value) (tv T, err error)

FromValue implements the TypeValueScanner.FromValue method.

func (BinaryValueScanner[T]) ScanValue 

func (BinaryValueScanner[T]) ScanValue() ValueScanner

ScanValue implements the TypeValueScanner.ScanValue method.

func (BinaryValueScanner[T]) Value 

func (BinaryValueScanner[T]) Value(v T) (driver.Value, error)

Value implements the TypeValueScanner.Value method.

type Descriptor 

type Descriptor struct {
	Tag           string                  // struct tag.
	Size          int                     // varchar size.
	Name          string                  // field name.
	Info          *TypeInfo               // field type info.
	ValueScanner  any                     // custom field codec.
	Unique        bool                    // unique index of field.
	Nillable      bool                    // nillable struct field.
	Optional      bool                    // nullable field in database.
	Immutable     bool                    // create only field.
	Default       any                     // default value on create.
	UpdateDefault any                     // default value on update.
	Validators    []any                   // validator functions.
	StorageKey    string                  // sql column or gremlin property.
	Enums         []struct{ N, V string } // enum values.
	Sensitive     bool                    // sensitive info string field.
	SchemaType    map[string]string       // override the schema type.
	Annotations   []schema.Annotation     // field annotations.
	Comment       string                  // field comment.
	Err           error
}

A Descriptor for field configuration.

type EnumValues 

type EnumValues interface {
	Values() []string
}

EnumValues defines the interface for getting the enum values.

type RType 

type RType struct {
	Name    string // reflect.Type.Name
	Ident   string // reflect.Type.String
	Kind    reflect.Kind
	PkgPath string
	Methods map[string]struct{ In, Out []*RType }
	// contains filtered or unexported fields
}

RType holds a serializable reflect.Type information of Go object. Used by the entc package.

func (*RType) Implements 

func (r *RType) Implements(typ reflect.Type) bool

Implements reports whether the RType ~implements the given interface type.

func (*RType) IsPtr 

func (r *RType) IsPtr() bool

IsPtr reports if the reflect-type is a pointer type.

func (*RType) String 

func (r *RType) String() string

RType returns the string value of the indirect reflect.Type.

func (*RType) TypeEqual 

func (r *RType) TypeEqual(t reflect.Type) bool

TypeEqual reports if the underlying type is equal to the RType (after pointer indirections).

type TextValueScanner 

type TextValueScanner[T interface {
	encoding.TextMarshaler
	encoding.TextUnmarshaler
}] struct{}

TextValueScanner returns a new TypeValueScanner that calls MarshalText for storing values in the database, and calls UnmarshalText for scanning database values into struct fields.

func (TextValueScanner[T]) FromValue 

func (TextValueScanner[T]) FromValue(v driver.Value) (tv T, err error)

FromValue implements the TypeValueScanner.FromValue method.

func (TextValueScanner[T]) ScanValue 

func (TextValueScanner[T]) ScanValue() ValueScanner

ScanValue implements the TypeValueScanner.ScanValue method.

func (TextValueScanner[T]) Value 

func (TextValueScanner[T]) Value(v T) (driver.Value, error)

Value implements the TypeValueScanner.Value method.

type Type 

type Type uint8

A Type represents a field type. 

const (
	TypeInvalid Type = iota
	TypeBool
	TypeTime
	TypeJSON
	TypeUUID
	TypeBytes
	TypeEnum
	TypeString
	TypeOther
	TypeInt8
	TypeInt16
	TypeInt32
	TypeInt
	TypeInt64
	TypeUint8
	TypeUint16
	TypeUint32
	TypeUint
	TypeUint64
	TypeFloat32
	TypeFloat64
)

List of field types.

func (Type) ConstName 

func (t Type) ConstName() string

ConstName returns the constant name of an info type. It's used by entc for printing the constant name in templates.

func (Type) Float 

func (t Type) Float() bool

Float reports if the given type is a float type.

func (Type) Integer 

func (t Type) Integer() bool

Integer reports if the given type is an integral type.

func (Type) Numeric 

func (t Type) Numeric() bool

Numeric reports if the given type is a numeric type.

func (Type) String 

func (t Type) String() string

String returns the string representation of a type.

func (Type) Valid 

func (t Type) Valid() bool

Valid reports if the given type if known type.

type TypeInfo 

type TypeInfo struct {
	Type     Type
	Ident    string
	PkgPath  string // import path.
	PkgName  string // local package name.
	Nillable bool   // slices or pointers.
	RType    *RType
}

TypeInfo holds the information regarding field type. Used by complex types like JSON and Bytes.

func (TypeInfo) Comparable 

func (t TypeInfo) Comparable() bool

Comparable reports whether values of this type are comparable.

func (TypeInfo) ConstName 

func (t TypeInfo) ConstName() string

ConstName returns the const name of the info type.

func (TypeInfo) Numeric 

func (t TypeInfo) Numeric() bool

Numeric reports if the given type is a numeric type.

func (TypeInfo) String 

func (t TypeInfo) String() string

String returns the string representation of a type.

func (TypeInfo) Stringer 

func (t TypeInfo) Stringer() bool

Stringer indicates if this type implements the Stringer interface.

func (TypeInfo) Valid 

func (t TypeInfo) Valid() bool

Valid reports if the given type if known type.

func (TypeInfo) Validator 

func (t TypeInfo) Validator() bool

Validator indicates if this type implements the Validator interface.

func (TypeInfo) ValueScanner 

func (t TypeInfo) ValueScanner() bool

ValueScanner indicates if this type implements the ValueScanner interface.

func (TypeInfo) Valuer 

func (t TypeInfo) Valuer() bool

Valuer indicates if this type implements the driver.Valuer interface.

type TypeValueScanner 

type TypeValueScanner[T any] interface {
	// Value returns the driver.Valuer for the GoType.
	Value(T) (driver.Value, error)
	// ScanValue returns a new ValueScanner that functions as an
	// intermediate result between database value and GoType value.
	// For example, sql.NullString or sql.NullInt.
	ScanValue() ValueScanner
	// FromValue returns the field instance from the ScanValue
	// above after the database value was scanned.
	FromValue(driver.Value) (T, error)
}

TypeValueScanner is the interface that groups all methods for attaching an external ValueScanner to a custom GoType.

type Validator 

type Validator interface {
	Validate() error
}

Validator interface wraps the Validate method. Custom GoTypes with this method will be validated when the entity is created or updated.

type ValueScanner 

type ValueScanner interface {
	driver.Valuer
	sql.Scanner
}

ValueScanner is the interface that groups the Value and the Scan methods implemented by custom Go types.

type ValueScannerFunc 

type ValueScannerFunc[T any, S ValueScanner] struct {
	V func(T) (driver.Value, error)
	S func(S) (T, error)
}

ValueScannerFunc is a wrapper for a function that implements the ValueScanner.

func (ValueScannerFunc[T, S]) FromValue 

func (f ValueScannerFunc[T, S]) FromValue(v driver.Value) (tv T, err error)

FromValue implements the TypeValueScanner.FromValue method.

func (ValueScannerFunc[T, S]) ScanValue 

func (f ValueScannerFunc[T, S]) ScanValue() ValueScanner

ScanValue implements the TypeValueScanner.ScanValue method.

func (ValueScannerFunc[T, S]) Value 

func (f ValueScannerFunc[T, S]) Value(t T) (driver.Value, error)

Value implements the TypeValueScanner.Value method.

Source Files

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Directories

Path Synopsis
gen is a codegen cmd for generating numeric build types from template.
 gen is a codegen cmd for generating numeric build types from template.

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