Add uniqueness constraint on environment name

[abodelot]

Add uniqueness constraint on environment name

[ant31]

What about having name composed with parents's name?

|-App1
   |-> Prod
|-App2
   |-> Prod

the 'full-names' would be :
app1-prod and app2-prod

In short uniqueness on name+ancestor

[abodelot]

But there will be also a default app at top level, this can leads to long name and a lack of customization.

Also, if the name is used as an identifier (url slug), it's better to have the field as-is in database so we can still fetch the item with a single query.

[ant31]

why default app?