From 937a90182270a6f0526e30e72f3dbe17f235e3b6 Mon Sep 17 00:00:00 2001
From: Nick Randall <nick.randall@domo.com>
Date: Thu, 8 Dec 2016 14:54:31 -0700
Subject: [PATCH 1/2] implement sql.Scanner and driver.Value for graphql.ID
 type

---
 graphql.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/graphql.go b/graphql.go
index 9a066ff1..5b4ece35 100644
--- a/graphql.go
+++ b/graphql.go
@@ -2,6 +2,8 @@ package graphql
 
 import (
 	"context"
+	"database/sql"
+	"database/sql/driver"
 	"encoding/json"
 	"fmt"
 
@@ -28,6 +30,26 @@ const OpenTracingTagError = "graphql.error"
 
 type ID string
 
+// compile time check
+var (
+	_ sql.Scanner   = (*ID)(nil)
+	_ driver.Valuer = (*ID)(nil)
+)
+
+func (id *ID) Scan(src interface{}) error {
+	switch t := src.(type) {
+	case string:
+		*id = ID(t)
+	default:
+		return fmt.Errorf("wrong type")
+	}
+	return nil
+}
+
+func (id ID) Value() (driver.Value, error) {
+	return string(id), nil
+}
+
 func ParseSchema(schemaString string, resolver interface{}) (*Schema, error) {
 	b := New()
 	if err := b.Parse(schemaString); err != nil {

From cefcfcab6d5b649a71e268771346a1f16cf45e9f Mon Sep 17 00:00:00 2001
From: Nick Randall <nick.randall@domo.com>
Date: Thu, 8 Dec 2016 15:51:59 -0700
Subject: [PATCH 2/2] adding more cases to scan method because others may want
 that

---
 graphql.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/graphql.go b/graphql.go
index 5b4ece35..178cfb1a 100644
--- a/graphql.go
+++ b/graphql.go
@@ -6,6 +6,7 @@ import (
 	"database/sql/driver"
 	"encoding/json"
 	"fmt"
+	"strconv"
 
 	opentracing "github.com/opentracing/opentracing-go"
 	"github.com/opentracing/opentracing-go/ext"
@@ -40,6 +41,12 @@ func (id *ID) Scan(src interface{}) error {
 	switch t := src.(type) {
 	case string:
 		*id = ID(t)
+	case int64:
+		*id = ID(strconv.FormatInt(t, 10))
+	case []byte:
+		*id = ID(t)
+	case nil:
+		// do nothing
 	default:
 		return fmt.Errorf("wrong type")
 	}