Don't be dependent on static custom_fields

Make custom_fields a interface{}

devices.go

@@ -137,30 +137,7 @@ type Device struct {
 		Slug  string `json:"slug"`
 		Color string `json:"color"`
 	} `json:"tags"`
-	CustomFields struct {
+	CustomFields  interface{} `json:"custom_fields,omitempty"`
-		DcimDeviceBelongsToService struct {
-			Value int    `json:"value"`
-			Label string `json:"label"`
-		} `json:"dcim_device_belongs_to_service"`
-		DcimDeviceCendotid          string `json:"dcim_device_cendotid"`
-		DcimDeviceExposedToInternet struct {
-			Value int    `json:"value"`
-			Label string `json:"label"`
-		} `json:"dcim_device_exposed_to_internet"`
-		DcimDeviceImportOsVersion           bool        `json:"dcim_device_import_os_version"`
-		DcimDeviceOsVersion                 interface{} `json:"dcim_device_os_version"`
-		DcimDevicesImportInterfaces         interface{} `json:"dcim_devices_import_interfaces"`
-		DcimDeviceImportvlan                bool        `json:"dcim_device_importvlan"`
-		DcimDeviceL2Domain                  interface{} `json:"dcim_device_l2domain"`
-		DcimDeviceCountTrunkVlans           interface{} `json:"dcim_device_count_trunk_vlans"`
-		DcimDeviceLogicalportsDeviceLimit   interface{} `json:"dcim_device_logicalports_device_limit"`
-		DcimDeviceLogicalportsActiveNum     interface{} `json:"dcim_device_logicalports_active_num"`
-		DcimDeviceLogicalportsConfiguredNum interface{} `json:"dcim_device_logicalports_configured_num"`
-		DcimDeviceCountTimesLastRun         interface{} `json:"dcim_device_count_times_last_run"`
-		DcimDeviceImportVrfs                interface{} `json:"dcim_device_import_vrfs"`
-		DcimDeviceVrfTag                    interface{} `json:"dcim_device_vrf_tag"`
-		DcimDevicePod                       interface{} `json:"dcim_device_pod"`
-	} `json:"custom_fields"`
 	ConfigContext struct {
 		AdditionalProp1 string `json:"additionalProp1"`
 		AdditionalProp2 string `json:"additionalProp2"`
@@ -199,33 +176,7 @@ type NewDevice struct {
 		Slug  string `json:"slug"`
 		Color string `json:"color"`
 	} `json:"tags"`
-	CustomFields struct {
+	CustomFields interface{} `json:"custom_fields,omitempty"`
-		DcimDeviceBelongsToService struct {
-			Value int    `json:"value,omitempty"`
-			Label string `json:"label,omitempty"`
-		} `json:"dcim_device_belongs_to_service,omitempty"`
-		DcimDeviceCendotid          string `json:"dcim_device_cendotid,omitempty"`
-		DcimDeviceExposedToInternet struct {
-			Value int    `json:"value,omitempty"`
-			Label string `json:"label,omitempty"`
-		} `json:"dcim_device_exposed_to_internet,omitempty"`
-		DcimDeviceImportOsVersion bool `json:"dcim_device_import_os_version,omitempty"`
-		DcimDevicePod             struct {
-			Value int    `json:"value,omitempty"`
-			Label string `json:"label,omitempty"`
-		} `json:"dcim_device_pod,omitempty"`
-		DcimDeviceOsVersion                 interface{} `json:"dcim_device_os_version,omitempty"`
-		DcimDevicesImportInterfaces         interface{} `json:"dcim_devices_import_interfaces,omitempty"`
-		DcimDeviceImportvlan                bool        `json:"dcim_device_importvlan,omitempty"`
-		DcimDeviceL2Domain                  interface{} `json:"dcim_device_l2domain,omitempty"`
-		DcimDeviceCountTrunkVlans           interface{} `json:"dcim_device_count_trunk_vlans,omitempty"`
-		DcimDeviceLogicalportsDeviceLimit   interface{} `json:"dcim_device_logicalports_device_limit,omitempty"`
-		DcimDeviceLogicalportsActiveNum     interface{} `json:"dcim_device_logicalports_active_num,omitempty"`
-		DcimDeviceLogicalportsConfiguredNum interface{} `json:"dcim_device_logicalports_configured_num,omitempty"`
-		DcimDeviceCountTimesLastRun         interface{} `json:"dcim_device_count_times_last_run,omitempty"`
-		DcimDeviceImportVrfs                interface{} `json:"dcim_device_import_vrfs,omitempty"`
-		DcimDeviceVrfTag                    interface{} `json:"dcim_device_vrf_tag,omitempty"`
-	} `json:"custom_fields,omitempty"`
 }
 
 type UpdateDevice struct {
@@ -253,13 +204,7 @@ type UpdateDevice struct {
 	Comments         string      `json:"comments,omitempty"`
 	LocalContextData string      `json:"local_context_data,omitempty"`
 	Tags             []string    `json:"tags,omitempty"`
-	CustomFields     struct {
+	CustomFields     interface{} `json:"custom_fields,omitempty"`
-		DcimDeviceBelongsToService  int    `json:"dcim_device_belongs_to_service,omitempty"`
-		DcimDeviceCendotid          string `json:"dcim_device_cendotid,omitempty"`
-		DcimDeviceExposedToInternet int    `json:"dcim_device_exposed_to_internet,omitempty"`
-		DcimDeviceImportOsVersion   bool   `json:"dcim_device_import_os_version,omitempty"`
-		DcimDevicePod               int    `json:"dcim_device_pod,omitempty"`
-	} `json:"custom_fields,omitempty"`
 }
 
 // DeviceFilter is used to filter dcim_device_list query to the Netbox API
@@ -321,12 +266,15 @@ func (s *DevicesService) List(ctx context.Context, f *DeviceFilter) (*Devices, e
 
 	encoder := schema.NewEncoder()
 
+	query = ""
+	if f != nil {
 		form := url.Values{}
 		err = encoder.Encode(f, form)
 		if err != nil {
 			return &devices, err
 		}
 		query = form.Encode()
+	}
 
 	req, err = s.client.newRequest(ctx, "GET", devicesPath, query, nil)
 	if err != nil {

devices_test.go

@@ -0,0 +1,36 @@
+package netboxgo
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestListDevices(t *testing.T) {
+	var err error
+
+	var (
+		apiToken string
+		apiURL   string
+	)
+
+	apiToken = os.Getenv("NETBOX_TOKEN")
+	apiURL = os.Getenv("NETBOX_URL")
+	assert.NotEmpty(t, apiToken)
+	assert.NotEmpty(t, apiURL)
+
+	var nb *Client
+	nb, err = NewClient(apiURL, nil)
+	if err != nil {
+		assert.Nil(t, err)
+	}
+	nb.SetToken(apiToken)
+
+	ctx := context.Background()
+	_, err = nb.Devices.List(ctx, nil)
+	if err != nil {
+		assert.Nil(t, err)
+	}
+}

go.mod

@@ -6,3 +6,10 @@ require (
 	github.com/gorilla/schema v1.1.0
 	github.com/pkg/errors v0.9.1
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+)

go.sum

@@ -1,4 +1,14 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gorilla/schema v1.1.0 h1:CamqUDOFUBqzrvxuz2vEwo8+SUdwsluFh7IlzJh30LY=
 github.com/gorilla/schema v1.1.0/go.mod h1:kgLaKoK1FELgZqMAVxx/5cbj0kT+57qxUrAlIO2eleU=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=