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Add notes about adding/ignoring fields in DDP

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Justin SB
2014-08-28 09:09:46 -07:00
parent a81fbf483e
commit c5a643c9f0
1 changed files with 9 additions and 0 deletions
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packages/livedata/DDP.md
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@@ -21,6 +21,15 @@ DDP messages are JSON objects, with some fields specified to be EJSON. Each one
has a `msg` field that specifies the message type, as well as other fields
depending on message type.
Extra fields may be included by the client and the server; this must not be an
error. Future minor revisions of DDP might add extra fields without changing
the DDP version; the client must therefore silently ignore unknown fields.
However, the client must not send extra fields other than those documented here
or in future versions, in case these extra fields have meaning to future
servers. On the server, all field changes must be optional/ignorable for
compatability with older clients; otherwise a new protocol version would be
required.
## Establishing a DDP Connection:
### Messages: