The JSON parse drops the description but not title

[hdale]

Hi! Thanks for a nice example of a full stack in Go!
But with this example code I have an issue. When sending JSON POST {"title":"some title","description":"some description"} I get an answer: {"error":"Title or Description not specified.","ok":false} . And the problem seems to be in the description part, because when I set in the ToDoController.go - > func CreateTodo() params.Description = "Hello" I get no error and the text will go to mongoDB.
I've tried to check of misspellings, but have not found any.
Any suggestions?

[jozsefsallai]

Hello!

That's kind of weird, I'll try to reproduce this issue.

I'd also like to mention that this repo and the guide associated to it were made using the first version of Fiber. I'd recommend switching to Fiber v2 as it brings lots of improvements to the framework.

[hdale]

Hi!
Thanks for your suggestion, but I did not succeed in the update. I added the v2 to all fiber imports and deleted the old go.sum and go.mod. Then ran the go mod init ...... Then I started the server and these errors poped up:
go run server.go
go: finding module for package go.mongodb.org/mongo-driver/mongo/options
go: finding module for package github.com/Kamva/mgm/v2
go: finding module for package go.mongodb.org/mongo-driver/bson
go: finding module for package github.com/gofiber/fiber/v2
go: found github.com/Kamva/mgm/v2 in github.com/Kamva/mgm/v2 v2.0.0
go: found github.com/gofiber/fiber/v2 in github.com/gofiber/fiber/v2 v2.2.5
go: found go.mongodb.org/mongo-driver/mongo/options in go.mongodb.org/mongo-driver v1.4.4

command-line-arguments

./server.go:36:10: cannot use controllers.GetAllTodos (type func(*fiber.Ctx)) as type func(*fiber.Ctx) error in argument to app.Get
./server.go:37:10: cannot use controllers.GetTodoByID (type func(*fiber.Ctx)) as type func(*fiber.Ctx) error in argument to app.Get
./server.go:38:11: cannot use controllers.CreateTodo (type func(*fiber.Ctx)) as type func(*fiber.Ctx) error in argument to app.Post
./server.go:39:12: cannot use controllers.ToggleTodoStatus (type func(*fiber.Ctx)) as type func(*fiber.Ctx) error in argument to app.Patch
./server.go:40:13: cannot use controllers.DeleteTodo (type func(*fiber.Ctx)) as type func(*fiber.Ctx) error in argument to app.Delete
./server.go:42:13: cannot use 3000 (type untyped int) as type string in argument to app.Listen

Notice I have added some comments to the files, so the original line numbers do not apply.

[hdale]

Hi! I think I find the breaking change in fiber v2:
gofiber/fiber#736
So the error parameter needs to be added.

[hdale]

Hi!
I added the error in each function where fiber-Ctx is used, but I get a bunch of new errors. It seems that the update from v1.4 to v2 has so many breaking changes that the sample code you gave needs several chnages. I'm just learning go, so I'm nit yet so comfortable with go that I can make those changes, so I would appreciate if you would update the sample code to handle the Fiber v2 changes. I think this example would give you good "points" in the future as Go and Fiber gets more new users.

[hdale]

I added the error return type and changed the return like this:
return ctx.Status(fiber.StatusOK).JSON(fiber.Map{
"ok": true,
"todo": todo,
})
So it started to work after I also changed the app.Listen(3000) to app.Listen(":3000")
But still I'm left with the same problem that the description comes out the parser as nil.
Any suggestions?

[hdale]

I've changed the func CreateTodo()
func CreateTodo(ctx fiber.Ctx) error {
/
params := new(struct {
Title string
Description string
})
*/
type params struct {
Title string json:"title"
Description string json:"description"
Done bool json:"done"
}
var body params

err := ctx.BodyParser(&body)
if err != nil {
	return ctx.Status(fiber.StatusBadRequest).JSON(fiber.Map{
		"error": "Cannot parse JSON",
	})
}
//ctx.BodyParser(&params)
if len(body.Title) == 0 || len(body.Description) == 0 {

	return ctx.Status(400).JSON(fiber.Map{
		"ok":    false,
		"error": "Title or Description not specified. Title: " + body.Title + " Descr.: " + body.Description + " . ",
	})
}

and my JSON POST
{
"title":"test todos 13",
"description:":"This is a test for todo 13"
}
recives again the same answer:
{
"error": "Title or Description not specified. Title: test todos 13 Descr.: . ",
"ok": false
}
And from the answer you can se that description is empty. and the parser does not give an error.
I just can't figure it out what is going on inside the ctx.BodyParser(&body) as it empties the description field ???.

[hdale]

Hi, Now I finally found the problem. I just was blind. I didn't notice my typo error in the sending JSON POST descrition key, I had there one semicolon too much.
Sorry for this confusion!
But now I have a working fiber v2 working!

[jozsefsallai]

glad it got fixed :) i should probably make another tutorial for fiberv2