function

Exists

Match documents that have a value for a field, or that have none.

Example

query.Exists("image", true)

Argument	Type	Description
`path`	`P`	The field, as a dot-separated name such as "seo.title" or a Path.
`exists`	`bool`	true matches documents with a value; false matches documents without one.

The comparison.

Expression

func Exists[P FieldPath](
	path P,
	exists bool,
) Expression

FieldPath
A field name in a filter or sort: a string such as "seo.title", or a Path.
Expression
A sealed immutable predicate consumed atomically by stores.