copier

Copier

copy source value into destination value.

Feature

• Support tag
• Support sql.Scanner
• Support anonymous
• Support slice
• Support map
• Support getter or setter
• support type convert
• support interface

Note

• DON'T SUPPORT UNEXPORTED EMBED PTR

Install

go get github.com/aacfactory/copier

Example

destination

type Date time.Time

type Foo struct {
	Str         string
	Int         int
	Bool        bool
	Float       float64
	Date        Date                `copy:"Time"`
	Bytes       json.RawMessage
	Faz         *Faz                `copy:"Faz"`
	Bazs        []*Faz
	Ints        []int
	ISS         [][]int
	FazMap      map[string]*Faz     `copy:"FazMap"`
	SQLTime     time.Time
	SQLString   string
	Ignore      interface{}         `copy:"-"`
}

type Faz struct {
	X string
}

source

type Bar struct {
	Str         string
	Int         int
	Bool        bool
	Float       float64
	Time        Date                `copy:"Time"`
	Bytes       json.RawMessage
	Baz         *Baz                `copy:"Faz"`
	Bazs        []*Baz
	Ints        []int
	ISS         [][]int
	BazMap      map[string]*Baz     `copy:"FazMap"`
	SQLTime     time.Time
	SQLString   string
	Ignore      interface{}         `copy:"-"`
}

type Baz struct {
	X string
}

copy

foo := &Foo{}
bar := Bar{...}
// use copy
err := copier.Copy(foo, bar)
// use value of
foo, err = copier.ValueOf[Foo](bar)

Type convert

• string
  • bool (false, true)
  • int
  • float
  • uint
  • byte
  • []byte
  • time.Time (RFC3339)
  • sql.NullString
  • text.TextMarshaler
• bool
  • string (false, true)
  • int (-1,0,1)
  • uint(0,1)
  • byte(f,t)
  • sql.NullBool
• int
  • string
  • bool (-1,1)
  • float
  • uint
  • time.Time (UnixMilli)
  • sql.NullIntX
• float
  • string
  • int
  • uint
  • sql.NullFloatX
• uint
  • string
  • bool (0,1)
  • int
  • float
  • time.Time (UnixMilli)
• byte
  • string (first byte)
  • []byte (first byte)
  • bool (t,f)
  • int
  • encoding.TextMarshaler (first byte)
• []byte
  • string
  • encoding.TextMarshaler
• time.Time
  • string (RFC3339)
  • sql.NullTime
  • int (UnixMilli)
  • uint (UnixMilli)
• encoding.TextUnmarshaler
  • string
  • []byte
  • encoding.TextMarshaler

Getter

The recv of getter method must be value, and num of results must be one.

Setter

The recv of getter method must be ptr, and num of params must be one.
Note: when src field type equals dst field type, setter will be discarded.