$graphLookup class

$graphLookup

Stage description

Performs a recursive search on a collection, with options for restricting the search by recursion depth and query filter. see mongo db documentation

Dart code:

   $graphLookup(
        from: 'employees',
        startWith: 'reportsTo',
        connectFromField: 'reportsTo',
        connectToField: 'name',
        as: 'reportingHierarchy',
        depthField: 'depth',
        maxDepth: 5,
        restrictSearchWithMatch: where..$eq('field', 'value'))
    .build();

Equivalent mongoDB aggregation stage:

  $graphLookup: {
    from: "employees",
    startWith: "$reportsTo",
    connectFromField: "reportsTo",
    connectToField: "name",
    as : "reportingHierarchy",
    depthField: "depth",
    maxDepth: 5,
    restrictSearchWithMatch : {
      field : {$eq: "value"}
    }
  }
Inheritance

Constructors

$graphLookup.new({required String from, required String startWith, required String connectFromField, required String connectToField, required String as, int? maxDepth, String? depthField, dynamic restrictSearchWithMatch})

Properties

content → ExpressionContent
no setterinherited
entry ↔ MapEntry<String, ExpressionContent>
getter/setter pairinherited
fieldName → String
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
key → String
no setterinherited
rawContent → dynamic
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stageName → String
no setterinherited

Methods

build() → MongoDocument
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited