Gin not able to unmarshal the json input into the correct struct type of armnetwork.LocalNetworkGateway while creating a localNetworkGateway api in azure .After using c.BindJson() the json input becomes vanished.

JSON input-(which is passing from postman) { "Location":"East US", "Properties":{ "BgpSettings":{ "Asn":64515, "BgpPeeringAddress":"10.128.1.1", "BgpPeeringAddresses":[ { "CustomBgpIPAddresses":[""], "IPConfigurationID":"", "DefaultBgpIPAddresses":[""], "TunnelIPAddresses":[""] } ], "PeerWeight":0 }, "Fqdn":"", "GatewayIPAddress":"10.128.1.1", "LocalNetworkAddressSpace":{ "AddressPrefixes":["11.128.0.0/16"] } },

"Tags":{
    "azure_localNwGw":"local-nw"
}

}

Description

• am trying create a local network gateway in azure for setting up the vpn connection and for that i need to bind the json input to the armnetwork.LocalNetworkGateway struct type in azure.

How to reproduce

package main

import (
    "github.com/gin-gonic/gin"
)

func main() {
    g := gin.Default()
    g.POST("localNetworkGw", func(c *gin.Context) {

ctx := context.Background()

    // creates an azure client

    cred, err := azidentity.NewDefaultAzureCredential(nil)
    if err != nil {
        log.Fatalf("Authentication failure: %+v", err)
        return
    }
    localNetworkGatewayClient, err := armnetwork.NewLocalNetworkGatewaysClient(os.Getenv("SUBSCRIPTION_ID"), cred, nil)
    if err != nil {
        return
    }
    // var createLocalNetworkGatewayInput armnetwork.LocalNetworkGateway

    var LocalNetworkGatewayInput armnetwork.LocalNetworkGateway

    if bindJsonErr := c.BindJSON(&LocalNetworkGatewayInput); bindJsonErr != nil {
        log.Println("bindjsonErr:- ", bindJsonErr)
        c.AbortWithStatusJSON(http.StatusBadRequest, bindJsonErr)
        return
 }

    log.Println("createLocalNetworkGatewayInput", LocalNetworkGatewayInput)// this variable supposed to be populated with the new value that are passed in json but it shows empty and nil value for all the parameters.

    log.Println("location", LocalNetworkGatewayInput.Location)//naturally this also comes as nil

    pollerResp, err := localNetworkGatewayClient.BeginCreateOrUpdate(ctx, resourceGroupName, localNetworkGatewayName, LocalNetworkGatewayInput, nil)

    if err != nil {
        log.Println("err while creating the localNwGw ", err)
        return
    }

    resp, err := pollerResp.PollUntilDone(ctx, nil)
    if err != nil {
        log.Println("err while waiting ", err)
        return
    }

    c.JSON(http.StatusOK, resp.LocalNetworkGateway)

    })
    g.Run(":9000")
}

Expectations

$ curl http://localhost:9000/localNetworkGw

the input json should bind to the armnetwork.localnetworkgatewayInput struct type successfully and the actual values that are just bind with local network gateway input variable should be logged and should not show the variable as empty.

## Actual result

$ curl -i http://localhost:9000/localNetworkGw ``` after performing jsonBind with the input json, the localNetworkgatewayInput becomes like

createLocalNetworkGatewayInput { map[] } location

RESPONSE 400: 400 Bad Request ERROR CODE: LocationRequired

---

{ "error": { "code": "LocationRequired", "message": "The location property is required for this definition." } }

Environment

• go version: 1.19.4
• gin version (or commit ref): v1.8.1
• operating system: windows 11

Comment From: DebankitaBeDev

that issue has been resolved by passing the same input parameter starts with the small letters instead of capital letter .Thanks, closing the ticket.