luci-base: form.js: reuse JSONMap data provider in GridSection modals

Reuse the same data provider as the parent JSONMap instance in order
to avoid inadvertently mangling the form data when saving the modal
edit dialog.

Fixes: bb9ede238a ("luci-base: form.js: reuse JSONMap data provider in GridSection modals")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 6 insertions, 3 deletions

diff --git a/modules/luci-base/htdocs/luci-static/resources/form.js b/modules/luci-base/htdocs/luci-static/resources/form.js
index 4edfc7e135..317b49fdfe 100644
--- a/modules/luci-base/htdocs/luci-static/resources/form.js
+++ b/modules/luci-base/htdocs/luci-static/resources/form.js
@@ -3213,10 +3213,13 @@ var CBITableSection = CBITypedSection.extend(/** @lends LuCI.form.TableSection.p
 
 			var m;
 
-			if (parent instanceof CBIJSONMap)
-				m = new CBIJSONMap(parent.data.data, null, null);
-			else
+			if (parent instanceof CBIJSONMap) {
+				m = new CBIJSONMap(null, null, null);
+				m.data = parent.data;
+			}
+			else {
 				m = new CBIMap(parent.config, null, null);
+			}
 
 			var s = m.section(CBINamedSection, section_id, this.sectiontype);