How to convert embedded structs
Goverter sees embedded structs like any other field. This means you can access them via the type name in ignore or map.
Given this model.
go
package example
type Person struct {
Address
Name string
}
type Address struct {
Street string
ZipCode string
}
type FlatPerson struct {
Name string
StreetName string
ZipCode string
}Notice the embedded struct Address on Person.
When defining the conversion method for Person (containing the embedded struct) to FlatPerson, you have to manually define the mapping for Address like this:
go
package example
// goverter:converter
// goverter:output:file generated/fromembedded.go
type FromConverter interface {
// goverter:map Address.ZipCode ZipCode
// goverter:map Address.Street StreetName
FromEmbedded(Person) FlatPerson
}go
// Code generated by github.com/jmattheis/goverter, DO NOT EDIT.
//go:build !goverter
package generated
import embedded "github.com/jmattheis/goverter/example/embedded"
type FromConverterImpl struct{}
func (c *FromConverterImpl) FromEmbedded(source embedded.Person) embedded.FlatPerson {
var exampleFlatPerson embedded.FlatPerson
exampleFlatPerson.Name = source.Name
exampleFlatPerson.StreetName = source.Address.Street
exampleFlatPerson.ZipCode = source.Address.ZipCode
return exampleFlatPerson
}In some cases it's useful to use autoMap if the embedded struct has equally named fields.
For the reverse operation you actually have to define two methods because of the rules defined in Guide: Configure Nested. For the given example it would look like this:
go
package example
// goverter:converter
// goverter:output:file generated/toembedded.go
type ToConverter interface {
// goverter:map . Address
ToEmbedded(FlatPerson) Person
// goverter:map StreetName Street
ToEmbeddedAddress(FlatPerson) Address
}go
// Code generated by github.com/jmattheis/goverter, DO NOT EDIT.
//go:build !goverter
package generated
import embedded "github.com/jmattheis/goverter/example/embedded"
type ToConverterImpl struct{}
func (c *ToConverterImpl) ToEmbedded(source embedded.FlatPerson) embedded.Person {
var examplePerson embedded.Person
examplePerson.Address = c.ToEmbeddedAddress(source)
examplePerson.Name = source.Name
return examplePerson
}
func (c *ToConverterImpl) ToEmbeddedAddress(source embedded.FlatPerson) embedded.Address {
var exampleAddress embedded.Address
exampleAddress.Street = source.StreetName
exampleAddress.ZipCode = source.ZipCode
return exampleAddress
}