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KeyGenerator
@GE{Key Generator}: ArangoDB allows using key generators for each
collection. Key generators have the purpose of auto-generating
values for the _key attribute of a document if none was specified
by the user.
By default, ArangoDB will use the traditional key generator.
The traditional key generator will auto-generate key values that
are strings with ever-increasing numbers. The increment values it
uses are non-deterministic.
Contrary, the autoincrement key generator will auto-generate
deterministic key values. Both the start value and the increment
value can be defined when the collection is created. The default
start value is 0 and the default increment is 1, meaning the key
values it will create by default are:
1, 2, 3, 4, 5, ...
When creating a collection with the autoincrement key generator
and an increment of 5, the generated keys would be:
1, 6, 11, 16, 21, ...