Missing "Not-In" Firestore Query Operator

[metallicgloss]

Is your feature request related to a problem? Please describe.
This request has been created under the "Feature Request" category, but should be considered as "Missing Functionality" and/or a "Bug Report"; there appears to be a limitation with the Google Cloud Firestore PHP library whereby the documented not-in query comparison operator is missing.

Describe the solution you'd like
Ideally, it'd be great to have the missing operator introduced to bring the PHP library in-line and up to date with the global documentation for Firestore. All other operators are usable, and while this problem does have workaround fixes, the fact that the functionality is documented does result in considerable debug time to realise that it is merely the library missing it.

Additional context
The operator is documented in the global documentation here but is not present or usable within the library unlike all other operators (including the newly introduced !=), and as such, returns an error when attempting to be used. The missing operator can be easily seen as being absent from the list of operators found here where only the in variant is included.

[jdpedrie]

Hi @metallicgloss,

I'll work on adding the convenience mapping to the Query class, but in the meantime, you can use Not In via the underlying protobuf type, like this:

$collection->where(
    'field',
    \Google\Cloud\Firestore\V1\StructuredQuery\FieldFilter\Operator::NOT_IN,
    ["value1", "value2"]
);

[metallicgloss]

Perfect, thank you @jdpedrie for that pointer! I'll use that as a temporary workaround until you've been able to complete the mapping in the Query class. Thanks!