updated json field validator and allow duplicated keys when serializing record models

core/field_json.go

@@ -2,6 +2,8 @@ package core
 
 import (
 	"context"
+	"encoding/json/jsontext"
+	"encoding/json/v2"
 	"slices"
 	"strconv"
 	"strings"
@@ -171,6 +173,18 @@ func (f *JSONField) ValidateValue(ctx context.Context, app App, record *Record)
 		return validation.NewError("validation_invalid_json", "Must be a valid json value")
 	}
 
+	// temp extra encoding/json/v2 check since the above validator is
+	// still using the v1 semantics
+	//
+	// @todo remove after updating the string validator
+	if len(raw) > 0 {
+		var dummy any
+		err := json.Unmarshal(raw, &dummy, jsontext.AllowInvalidUTF8(true))
+		if err != nil {
+			return validation.NewError("validation_invalid_json", "Must be a valid json value")
+		}
+	}
+
 	rawStr := strings.TrimSpace(raw.String())
 
 	if f.Required && slices.Contains(emptyJSONValues, rawStr) {