Update generator.go

[borovan-zz]

Hi, sorry this is my first pull request ever so go easy!

There was a breaking change in satori/go.uuid#66 satori UUID. Goa fixed this, but the models that Gorma generates have the following line -

model.ID = uuid.NewV4()

which generates the error...

models\character.go:121:23: multiple-value uuid.NewV4() in single-value context

So if you use the fixed version (goa/uuid) with the workaround as opposed to directly including satori/go.uuid then it compiles. Probably want to test it though!

[raphael]

Thank you for the PR! Seems the "better" fix would be to change the generated code to produce the right call. So updating

gorma/writers.go

Line 522 in acb0546

{{ if eq $pk.Datatype "uuid" }}model.{{$pk.FieldName}} = uuid.NewV4(){{ end }}

to use uuid.Must(uuid.NewV4()) instead. Also as you mentioned bonus points if there was a test :)
Finally would you mind updating the .travis.yaml file so that CI runs against newer version of Go (thinking 1.9.x and 1.10.x) since goa isn't compatible with 1.7.x anymore.

[borovan-zz]

Hope that works. Sorry I'm doing a bit of a intensive Go training course right now and tests are later this week! Haven't written one ever, probably why my code always breaks.

[raphael]

Apologies, I lost track of this PR. This is getting addressed by #166 which also updates the Travis "on" section.