schema/field: support for sensitive json fields (#2701)

Closed https://github.com/ent/ent/issues/2596

entc/integration/json/ent/schema/user.go

@@ -42,6 +42,7 @@ func (User) Fields() []ent.Field {
 		field.Strings("strings").
 			Optional(),
 		field.JSON("addr", Addr{}).
+			Sensitive().
 			Optional(),
 	}
 }

entc/integration/json/ent/user.go

@@ -38,7 +38,7 @@ type User struct {
 	// Strings holds the value of the "strings" field.
 	Strings []string `json:"strings,omitempty"`
 	// Addr holds the value of the "addr" field.
-	Addr schema.Addr `json:"addr,omitempty"`
+	Addr schema.Addr `json:"-"`
 }
 
 // scanValues returns the types for scanning values from sql.Rows.
@@ -184,8 +184,7 @@ func (u *User) String() string {
 	builder.WriteString("strings=")
 	builder.WriteString(fmt.Sprintf("%v", u.Strings))
 	builder.WriteString(", ")
-	builder.WriteString("addr=")
+	builder.WriteString("addr=<sensitive>")
-	builder.WriteString(fmt.Sprintf("%v", u.Addr))
 	builder.WriteByte(')')
 	return builder.String()
 }

entc/integration/json/json_test.go

@@ -11,6 +11,7 @@ import (
 	"net"
 	"net/http"
 	"net/url"
+	"reflect"
 	"testing"
 
 	"entgo.io/ent/dialect"
@@ -199,6 +200,11 @@ func NetAddr(t *testing.T, client *ent.Client) {
 	require.Equal(t, "127.0.0.1:80", client.User.GetX(ctx, usr.ID).Addr.String())
 	usr.Update().SetAddr(schema.Addr{Addr: &net.UDPAddr{IP: ip, Port: 1812}}).ExecX(ctx)
 	require.Equal(t, "127.0.0.1:1812", client.User.GetX(ctx, usr.ID).Addr.String())
+
+	// Ensure sensitive fields are not marshalled.
+	f, ok := reflect.TypeOf(ent.User{}).FieldByName("Addr")
+	require.True(t, ok)
+	require.Equal(t, "-", f.Tag.Get("json"))
 }
 
 func Dirs(t *testing.T, client *ent.Client) {

schema/field/field.go

@@ -716,6 +716,12 @@ func (b *jsonBuilder) Comment(c string) *jsonBuilder {
 	return b
 }
 
+// Sensitive fields not printable and not serializable.
+func (b *jsonBuilder) Sensitive() *jsonBuilder {
+	b.desc.Sensitive = true
+	return b
+}
+
 // StructTag sets the struct tag of the field.
 func (b *jsonBuilder) StructTag(s string) *jsonBuilder {
 	b.desc.Tag = s

schema/field/field_test.go

@@ -474,9 +474,11 @@ func TestJSON(t *testing.T) {
 	fd = field.Strings("strings").
 		Optional().
 		Default([]string{"a", "b"}).
+		Sensitive().
 		Descriptor()
 	assert.NoError(t, fd.Err)
 	assert.True(t, fd.Optional)
+	assert.True(t, fd.Sensitive)
 	assert.Empty(t, fd.Info.PkgPath)
 	assert.Equal(t, "strings", fd.Name)
 	assert.Equal(t, []string{"a", "b"}, fd.Default)