Fixing Terraform Configuration Error with iosxe_restconf on CAT9K

[CuongDoManh0710]

Fixing Terraform Configuration Error with iosxe_restconf on CAT9K

We are using iosxe_restconf to configure the interface for a CAT9K device. Our code is as follows. After applying it in Terraform, the following error was reported: Can you help me fix it?
Thank you very much!

resource "iosxe_restconf" "gigabit_ethernet" {
  path = "Cisco-IOS-XE-native:native/interface"
 
  lists = [
    {
      name = "GigabitEthernet"
      key  = "name"
      items = [
        {
          name        = "1/0/10"
          description = "Configured via Terraform"
          switchport-config = jsonencode({
            switchport = {
              "Cisco-IOS-XE-switch:access" = {
                vlan = {
                  vlan = 18
                }
              },
              "Cisco-IOS-XE-switch:mode" = {
                access = {}
              }
            }
          })
 
        }
      ]
    }
  ]
}

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  ~ update in-place
 
Terraform will perform the following actions:
 
  # iosxe_restconf.gigabit_ethernet will be updated in-place
  ~ resource "iosxe_restconf" "gigabit_ethernet" {
      ~ attributes = {} -> (known after apply)
        id         = "Cisco-IOS-XE-native:native/interface"
      ~ lists      = [
          ~ {
              ~ items = [
                  ~ {
                      ~ "description"       = "Configured via test" -> "Configured via Terraform"
                      + "switchport-config" = jsonencode(
                            {
                              + switchport = {
                                  + "Cisco-IOS-XE-switch:access" = {
                                      + vlan = {
                                          + vlan = 18
                                        }
                                    }
                                  + "Cisco-IOS-XE-switch:mode"   = {
                                      + access = {}
                                    }
                                }
                            }
                        )
                        # (1 unchanged element hidden)
                    },
                ]
                name  = "GigabitEthernet"
                # (1 unchanged attribute hidden)
            },
        ]
        # (2 unchanged attributes hidden)
    }
 
Plan: 0 to add, 1 to change, 0 to destroy.
 
Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.
 
  Enter a value: yes
 
iosxe_restconf.gigabit_ethernet: Modifying... [id=Cisco-IOS-XE-native:native/interface]
╷
│ Error: Client Error
│ 
│   with iosxe_restconf.gigabit_ethernet,
│   on interface_restconf.tf line 1, in resource "iosxe_restconf" "gigabit_ethernet":
│    1: resource "iosxe_restconf" "gigabit_ethernet" {
│ 
│ Failed to configure object (PATCH), got error: HTTP Request failed: StatusCode 400, RESTCONF errors {Error:[{ErrorType:application ErrorTag:malformed-message ErrorAppTag:
│ ErrorPath:/Cisco-IOS-XE-native:native/interface ErrorMessage:invalid value for: switchport-config in
│ /ios:native/ios:interface/ios:GigabitEthernet[ios:name='1/0/10']/ios:switchport-config ErrorInfo:}]} {PatchId: GlobalStatus:{Ok:false Errors:{Error:[]}}
│ EditStatus:{Edit:[]} Errors:{Error:[]}}

[danischm]

You cannot use jsonencode() to provide nested attributes. You can use a path syntax to refer to nested leafs in YANG models:

"switchport-config/switchport/Cisco-IOS-XE-switch:access/vlan/vlan" = 100