I had the same need and I did it this way
id = md5 (email)

What do you think?

Vincenzo


2013/2/21 svilen <[email protected]>

> hi
> the docs state that anything can be put in _id, except that it can't
> start with "_" underscore.
>
> still, the _ is valid character for starting email address...
> effectively meaning that in general, e-mail addresses cannot be used as
> id (the only enforced unique thing).. and has to be stored as a field.
> or prepended with something non-underscore.
>
> correct?
>
> svil
>

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