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mingo
mingo
operators/query/element/exists
$exists
Function $exists
$exists
(
selector
,
value
,
options
)
:
(
(
obj
)
=>
boolean
)
Matches documents that have the specified field.
Parameters
selector
:
string
value
:
unknown
options
:
Options
Returns
(
(
obj
)
=>
boolean
)
(
obj
)
:
boolean
Parameters
obj
:
RawObject
Returns
boolean
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Matches documents that have the specified field.