Cannot update key fields using odata

[phil-mitchell]

When using odata, it is impossible to update a key field. The URL is constructed based on the current values in the entity, so if one of the key fields has changed, the MERGE request will result in a 404 Not Found error.

The odata server is nice enough to include a URI in the metadata of the entity. Why not use that instead of reconstructing the URL every time?

[phil-mitchell]

Yes, updating key fields is disallowed by odata, but 404 is not the right error message, and it should really be left to the provider to determine what to do.