public sealed class PreconditionReference documentation and code samples for the Firestore API class Precondition.
Immutable class representing a precondition for an update operation.
Namespace
GoogleCloudFirestoreAssembly
Google.Cloud.Firestore.dll
Properties
Exists
public bool? Exists { get; }True if the document must exist; false if the document must not exist. If this is non-null, LastUpdateTime will be null.
| Property Value | |
|---|---|
| Type | Description |
bool | |
LastUpdateTime
public Timestamp? LastUpdateTime { get; }Condition that the document was last updated at the specified timestamp, if specified. If this is non-null, Exists will be null.
| Property Value | |
|---|---|
| Type | Description |
Timestamp | |
MustExist
public static Precondition MustExist { get; }Precondition that the document must exist, but with any last update time.
| Property Value | |
|---|---|
| Type | Description |
Precondition | |
None
public static Precondition None { get; }No precondition.
| Property Value | |
|---|---|
| Type | Description |
Precondition | |
Methods
LastUpdated(Timestamp)
public static Precondition LastUpdated(Timestamp timestamp)Creates a precondition that the document has the specified last update time.
| Parameter | |
|---|---|
| Name | Description |
timestamp | Timestamp |
| Returns | |
|---|---|
| Type | Description |
Precondition | |