Edge case: editing a source while its metadata is updated

[thomaspiller]

If a publisher alters the structure of a source (add, rename, duplicate, remove column) while another is modifying the metadata of the same source, the structural changes will not be propagated in the metadata stored in mx_sources. This is because the version loaded into the metadata editor predates the structural edits and once saved, they will overwrite the version of the metadata containing the structural changes saved from the table editor.

An approach to avoid this could be to do a check on date_modified to ensure that the source has not been updated in the meantime.

[fxi]

This issue should probably be resolved once the metadata editor is integrated with the Node.js: editing metadata for a given source will be locked until table editing is completed, and vice versa.