added support for loading a serialized json payload as part of multipart/form-data request

forms/record_upsert.go

@@ -165,7 +165,7 @@ func (form *RecordUpsert) extractMultipartFormData(
 
 	data := map[string]any{}
 	filesToUpload := map[string][]*filesystem.File{}
-	arrayValueSupportTypes := schema.ArraybleFieldTypes()
+	arraybleFieldTypes := schema.ArraybleFieldTypes()
 
 	for fullKey, values := range r.PostForm {
 		key := fullKey
@@ -178,8 +178,18 @@ func (form *RecordUpsert) extractMultipartFormData(
 			continue
 		}
 
+		// special case for multipart json encoded fields
+		if key == rest.MultipartJsonKey {
+			for _, v := range values {
+				if err := json.Unmarshal([]byte(v), &data); err != nil {
+					form.app.Logger().Debug("Failed to decode @json value into the data map", "error", err, "value", v)
+				}
+			}
+			continue
+		}
+
 		field := form.record.Collection().Schema.GetFieldByName(key)
-		if field != nil && list.ExistInSlice(field.Type, arrayValueSupportTypes) {
+		if field != nil && list.ExistInSlice(field.Type, arraybleFieldTypes) {
 			data[key] = values
 		} else {
 			data[key] = values[0]

forms/record_upsert_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/pocketbase/pocketbase/tests"
 	"github.com/pocketbase/pocketbase/tools/filesystem"
 	"github.com/pocketbase/pocketbase/tools/list"
+	"github.com/pocketbase/pocketbase/tools/rest"
 	"github.com/pocketbase/pocketbase/tools/types"
 )
 
@@ -150,9 +151,10 @@ func TestRecordUpsertLoadRequestMultipart(t *testing.T) {
 	}
 
 	formData, mp, err := tests.MockMultipartData(map[string]string{
-		"a.b.id":      "test_id",
-		"a.b.text":    "test123",
-		"a.b.unknown": "test456",
+		"a.b.id":                       "test_id",
+		"a.b.text":                     "test123",
+		"a.b.unknown":                  "test456",
+		"a.b." + rest.MultipartJsonKey: `{"json":["a","b"],"email":"test3@example.com"}`,
 		// file fields unset/delete
 		"a.b.file_one-":                    "test_d61b33QdDU.txt", // delete with modifier
 		"a.b.file_many.0":                  "",                    // delete by index
@@ -184,6 +186,19 @@ func TestRecordUpsertLoadRequestMultipart(t *testing.T) {
 		t.Fatalf("Didn't expect unknown field to be set, got %v", v)
 	}
 
+	if v, ok := form.Data()["email"]; !ok || v != "test3@example.com" {
+		t.Fatalf("Expect email field to be %q, got %q", "test3@example.com", v)
+	}
+
+	rawJsonValue, ok := form.Data()["json"].(types.JsonRaw)
+	if !ok {
+		t.Fatal("Expect json field to be set")
+	}
+	expectedJsonValue := `["a","b"]`
+	if rawJsonValue.String() != expectedJsonValue {
+		t.Fatalf("Expect json field %v, got %v", expectedJsonValue, rawJsonValue)
+	}
+
 	fileOne, ok := form.Data()["file_one"]
 	if !ok {
 		t.Fatal("Expect file_one field to be set")