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Sorting support on Array fields.

Presently, I'm attempting to arrange(sort) the documents within my collection based on a key nested within an array object. However, sorting isn't functioning as expected in this scenario. A proper explanation with example is here what I mean. ht...

Guest about 2 years ago in Querying & Aggregations 0 Submitted

1 VOTE

JSON

I'm converting a lot of data for export from MongoDB -> Postgresql I would like an aggregation function to convert an object to JSON { "$addField": { "_id": true, "json": { '$convert': { 'input': '$subdocument', 'to': 'json', # // Id...

Guest about 2 years ago in Querying & Aggregations 0 Submitted

2 VOTE

support $lookup for update aggregation

We frequently denormalise either full documents or subsets to different documents in order to speed up reading, create indexes or paginate/sort on fields. Consider a user collection and a task collection, if a task can be assigned to the user, it...

Guest over 4 years ago in Querying & Aggregations 2 Submitted

1 VOTE

array length as computed to be indexed

in some cases, I need to filter only docs with specific (or range of) sizes of nested arrays. it will be good if I can configure 'automatic index' to keep the length of the array, based on the field name I will provide to the index, and then I can...

Guest over 2 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

$group all fields

$group should have the ability to allow specifying all fields in a document (without explicitly defining them all, which can lead to duplicating dozens of lines just to do "key: $first") This will help users that use $unwind and then want to $gro...

Guest over 2 years ago in Querying & Aggregations 1 Submitted

1 VOTE

Support indexes on single array elements (e.g. "MyArray.0")

Currently, if I create an index on an array field and specify an element number ("MyArray.0"), the system still indexes the whole array as normal. Normally, this might increase the index size but at least it's still useful when querying MyArray.0...

Guest over 2 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

Improve the mongo query language

Sometimes I find Mongo query language as not put very well together, sometimes it feels like a patch job. It would be nice, if you could make you query language easier to reason about. It would be awesome, if you could introduce fluent style api b...

Guest about 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Add functionality to specify the readConcern level at db.collection.findOne()

Add functionality to specify the readConcern at db.collection.findOne(). At the version 5.0.14 it's not supported.

Guest about 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

$currentDate option to only update if the document was modified

A common pattern in a data model is to have a field that denotes when the data was last modified. For this example, let this field be called "updated". I want to toggle a field on a document called "enabled", and if the value is modified I also wa...

Guest over 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

UTF 16 and UTF 32 support

Currently MongoDB only support UTF 8 strings but it will be great if there is a configuration to change UTF 16 or UTF 32.

Guest over 3 years ago in Data Modeling & Indexing 0 Submitted

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