defaults

Documentation

Index

• func CanUpdate(v interface{}) bool
• func MustSet(ptr interface{})
• func Set(ptr interface{}, fld *model.DefField) error
• type Gender
• type OtherStruct
• type Sample
• type Setter

Functions

func CanUpdate

func CanUpdate(v interface{}) bool

CanUpdate returns true when the given value is an initial value of its type

func MustSet

func MustSet(ptr interface{})

MustSet function is a wrapper of Set function It will call Set and panic if err not equals nil.

func Set

func Set(ptr interface{}, fld *model.DefField) error

Set initializes members in a struct referenced by a pointer. Maps and slices are initialized by `make` and other primitive types are set with default values. `ptr` should be a struct pointer

Types

type Gender

type Gender string

type OtherStruct

type OtherStruct struct {
	Hello  string `default:"world"` // Tags in a nested struct also work
	Foo    int    `default:"-"`
	Random int    `default:"-"`
}

type Sample

type Sample struct {
	Name   string `default:"John Smith"`
	Age    int    `default:"27"`
	Gender Gender `default:"m"`

	Slice       []string       `default:"[]"`
	SliceByJSON []int          `default:"[1, 2, 3]"` // Supports JSON
	Map         map[string]int `default:"{}"`
	MapByJSON   map[string]int `default:"{\"foo\": 123}"`

	Struct    OtherStruct  `default:"{}"`
	StructPtr *OtherStruct `default:"{\"Foo\": 123}"`

	NoTag  OtherStruct // Recurses into a nested struct by default
	OptOut OtherStruct `default:"-"` // Opt-out
}

type Setter

type Setter interface {
	SetDefaults()
}

Setter is an interface for setting default values