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In javascript in the shell fields are being reorder, with numeric ones first:

> x = {a:1, 10:1}
{"10":1, "a":1}

This becomes a problem when I create a compound index with a numeric attribute name like 10 since the index is not created as expected.

is duplicated by

SERVER-15753 Compound index is reordered automatically when used with numerical field keys

SERVER-16365 Compound index creation does not follow the order we specifiy

SERVER-34265 when field name is number,sort by multiple fields is incorrect

SERVER-13933 compound index with numeric keys only

related to

COMPASS-4258 Sort does not preserve field order

NODE-578 Order of sort fields is lost for numeric field names

SERVER-15754 Allow createIndexes to take "key" field as an array

SERVER-28569 Shell APIs violate ECMAScript's object property order spec

(3 related to)