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 <[email protected]>
(cherry picked from commit dd47f3f6742a6d80221b75aa7b6ea27eca2bb535)

diff --git a/modules/luci-base/htdocs/luci-static/resources/form.js b/modules/luci-base/htdocs/luci-static/resources/form.js
index 5e31dc0dbe7749fdacedcc28f99522f69362f313..103173e1c88481614d2c77813e32d8be622c05d3 100644 (file)
--- 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);