Comments (3)
Added in v2.1.0
. See https://github.com/kofrasa/mingo/wiki/API
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For special cases ($sort
, $group
etc) the entire sequence is realized, processed, and a new iterator (stream object) is returned.
from mingo.
Thanks for the question zackehh.
I did consider streaming aggregations early in the implementation, but then realized that it is not feasible due to $group
and $sort
operations which must operate on the entire collection.
The current streaming implementation for queries is not lazy and it was introduced to mimic MongoDB API interface so users can almost copy + paste code. That said, it is possible to do streaming subject to these constraints.
- Ensuring the collection is immutable
- Enforcing rules for streaming functionality (no $sort, $group etc)
Streaming can be implemented in one of two ways.
- Using an iterator with chained functions
- Using the new coroutine and/or generator functions in modern javascript.
Although I haven't settled on a position yet, there are some constraints I have place on the project to guide development. This include making Mingo
a zero-dependency library and backward compatible for not too old browser version. So these will inform the implementation choice.
Please let me know whether this answers your question.
Thanks.
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Related Issues (20)
- Add support for $percentile (aggregation) HOT 2
- Add support for $bitAnd (aggregation)
- Add support for $bitNot (aggregation)
- Add support $bitOr (aggregation)
- Add support for $bitXor (aggregation)
- updateObject fails when the $exists operator is used with $pull HOT 2
- $push with updateObject does not create the array if the fields does not exist HOT 1
- $inc with updateObject does not create the field if it doesn't exist HOT 1
- aggregate() $group stage with mongodb object id as group key only creates one single group HOT 1
- aggregate() $project stage modifies original collection when using negative projection on nested field HOT 2
- TypeError: Cannot convert undefined or null to object HOT 9
- AWS SSO HOT 2
- query HOT 1
- $project step omits referenced properties when matching property exists in incoming data HOT 3
- Basic query operators not loaded by default for update operation. HOT 4
- 6.4.11 regression: ESM imports no longer work HOT 4
- mingo.io is expired
- Minify compiled output for publishing
- Support value equality check for custom types using toString
- 6.4.14 regression: ESM imports no longer work HOT 3
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