Require :dato/guid when creating a new entity

[sgrove]

@dwwoelfel Is there a way to tell that a new entity is being created (both server-side and client-side), and either 1. require a :dato/guid k/v pair, or 2. auto-insert one? Would help with the "pit of success" story.

[dwwoelfel]

The frontend does that by rejecting new entities without a :dato/guid. It could be configured to auto-insert one, but I think that might cause some data integrity problems. I think it's better to fail noisily than to silently insert unexpected data. We could write a helper for it, e.g. dato/create-new.

Server-side, we could also write a helper or maybe use a transactor function.

[sgrove]

That's a good idea - I have an assert in broadcast-tx that checks that the
vals of the fid-map are not nil, so that's been helping me keep things
clean on the client. I reworked my data-gen ns after a major schema change,
and wasn't putting dato/guid on some stuff, and then seeing strange
behavior client-side. Perhaps the client should also fail noisily (in dev)
if it receives an entity from the server without a dato/guid?

On Wed, Aug 12, 2015 at 1:03 PM, Daniel Woelfel notifications@github.com
wrote:

The frontend does that by rejecting new entities without a :dato/guid. It
could be configured to auto-insert one, but I think that might cause some
data integrity problems. I think it's better to fail noisily than to
silently insert unexpected data. We could write a helper for it, e.g.
dato/create-new.

Server-side, we could also write a helper or maybe use a transactor
function.

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