Making a post call with multiple instances of the same struct

[G K]

Hi,

   I'm trying to create an HTTP rest api end where a POST method will be able to accept and deserialize (unmarshall) a same data structre into numerous instances. For the sake of example, lets say I have json struct:

type Lock struct

{

   Key uint      `json:"key"`

}

Nom Im trying to post unspecified amount of keys. I tried defying the type as a slice but unmarshall function would not work. Does anyone have any ideas how to go about this?

Thanks,

GK

[Ian Lance Taylor]

Using a slice sounds like the right thing to do. What exactly did you
try and what exactly happened?

Ian

[G K]

I defined a global variable of the struct kind "Lock" as a slice - var Lock []models.Lock

But then every time I tried to unmarshal the data from the post call using the the reference to &Lock, I was getting an error message that function couldn't unmarshal the object into a Go value. It unmarshals fine you define the var Lock model.Lock as just a struct.

[Ian Lance Taylor]

On Mon, Aug 5, 2024 at 11:32 AM G K <gku...@gmail.com> wrote:
>
> I defined a global variable of the struct kind "Lock" as a slice - var Lock []models.Lock
> But then every time I tried to unmarshal the data from the post call using the the reference to &Lock, I was getting an error message that function couldn't unmarshal the object into a Go value. It unmarshals fine you define the var Lock model.Lock as just a struct.

Thanks, but rather than rephrasing into English, show us exactly what
you did, and exactly what happened. Show us the exact code. Tell us
the exact error message. Thanks.

Ian

> On Monday, August 5, 2024 at 11:37:26 AM UTC-5 Ian Lance Taylor wrote:
>>
>> On Mon, Aug 5, 2024 at 6:55 AM G K <gku...@gmail.com> wrote:
>> >
>> > I'm trying to create an HTTP rest api end where a POST method will be able to accept and deserialize (unmarshall) a same data structre into numerous instances. For the sake of example, lets say I have json struct:
>> > type Lock struct
>> > {
>> > Key uint `json:"key"`
>> > }
>> > Nom Im trying to post unspecified amount of keys. I tried defying the type as a slice but unmarshall function would not work. Does anyone have any ideas how to go about this?
>>
>> Using a slice sounds like the right thing to do. What exactly did you
>> try and what exactly happened?
>>
>> Ian
>

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[Marcello H]

Are you sure, when looking at the incoming message, that it is a json holding multiple "locks"?
If so, then you could make a small program just to unmarshall that , just to see what happens.

If you adjust the following code to what you want, you make it easier for us to understand:
https://go.dev/play/p/D_SSq2F_5hM

Op maandag 5 augustus 2024 om 20:51:23 UTC+2 schreef Ian Lance Taylor: