Operators

The various operators that are supported are:

Combination Operators

Operator	Description
_and	Matches if all the conditions in the array match
_or	Matches if any of the conditions in the array match
_not	Matches if the given condition does not match
_nor	Matches if none of the conditions in the array match
_all	Matches an array value if it contains all the elements of the argument array
_elemMatch	Matches and returns all assets that contain an array field with at least one element that matches all the specified query criteria.
_allMatch	Matches and returns all assets that contain an array field with all its elements matching all the specified query criteria.
_keyMapMatch	Matches and returns all assets that contain a map that contains at least one key that matches all the specified query criteria

Condition operators

Operator	Argument type	Description
_lt	Number	The field is less than the argument
_lte	Number	The field is less than or equal to the argument
_eq	Any	The field is equal to the argument
_ne	Any	The field is not equal to the argument
_gt	Number	The field is greater than the argument
_gte	Number	The field is greater than or equal to the argument
_exists	Boolean	Check whether the field exists or not, regardless of its value
_in	Any	The asset field value must exist in the list provided
_nin	Any	The asset field value must not exist in the list provided
_regex	String	A regular expression pattern to match against the asset field. Only matches when the field is a string value and matches the supplied regular expression. The matching algorithms are based on the Perl Compatible Regular Expression (PCRE) library. For more information about what is implemented, see the see the Erlang Regular Expression