Example code for gin to bind form data using custom structure

type StructA struct {
  FieldA string `form:"field_a"`
}
 
type StructB struct {
  NestedStruct StructA
  FieldB string `form:"field_b"`
}
 
type StructC struct {
  NestedStructPointer *StructA
  FieldC string `form:"field_c"`
}
 
type StructD struct {
  NestedAnonyStruct struct {
    FieldX string `form:"field_x"`
  }
  FieldD string `form:"field_d"`
}
 
func GetDataB(c *) {
  var b StructB
  (&b)
  (200, {
    "a": ,
    "b": ,
  })
}
 
func GetDataC(c *) {
  var b StructC
  (&b)
  (200, {
    "a": ,
    "c": ,
  })
}
 
func GetDataD(c *) {
  var b StructD
  (&b)
  (200, {
    "x": ,
    "d": ,
  })
}
 
func main() {
  r := ()
  ("/getb", GetDataB)
  ("/getc", GetDataC)
  ("/getd", GetDataD)
 
  ()
}

$ curl "http://localhost:8080/getb?field_a=hello&field_b=world"
{"a":{"FieldA":"hello"},"b":"world"}
$ curl "http://localhost:8080/getc?field_a=hello&field_c=world"
{"a":{"FieldA":"hello"},"c":"world"}
$ curl "http://localhost:8080/getd?field_x=hello&field_d=world"
{"d":"world","x":{"FieldX":"hello"}}

type StructX struct {
  X struct {} `form:"name_x"` // HERE have form
}
 
type StructY struct {
  Y StructX `form:"name_y"` // HERE have form
}
 
type StructZ struct {
  Z *StructZ `form:"name_z"` // HERE have form
}