FirebaseFirestore Framework Reference

ConditionalExpression

public class ConditionalExpression : FunctionExpression, @unchecked Sendable

A ConditionalExpression is a FunctionExpression that evaluates to one of two expressions based on a boolean condition.

This is equivalent to a ternary operator (condition ? then : else).

Example of using ConditionalExpression:

// Create a new field "status" based on the "rating" field.
// If rating > 4.5, status is "top_rated", otherwise "regular".
firestore.pipeline()
  .collection("products")
  .addFields([
    ConditionalExpression(
      Field("rating").greaterThan(4.5),
      then: Constant("top_rated"),
      else: Constant("regular")
    ).as("status")
  ])


                    
                    
                    init(_:then:else:)

Creates a new ConditionalExpression.

Declaration

Swift

public init(_ expression: BooleanExpression,
            then thenExpression: Expression,
            else elseExpression: Expression)

Parameters

`expression`	The `BooleanExpression` to evaluate.
`thenExpression`	The `Expression` to evaluate if the boolean expression is `true`.
`elseExpression`	The `Expression` to evaluate if the boolean expression is `false`.

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ConditionalExpression

init(_:then:else:)

Declaration

Parameters

FirebaseFirestore Framework Reference