/// <summary>
/// Adds an update operation that updates just the specified fields paths in the document, with the corresponding values.
/// </summary>
/// <param name="documentReference">A document reference indicating the path of the document to update. Must not be null.</param>
/// <param name="updates">The updates to perform on the document, keyed by the field path to update. Fields not present in this dictionary are not updated. Must not be null.</param>
/// <param name="precondition">Optional precondition for updating the document. May be null, which is equivalent to <see cref="Precondition.MustExist"/>.</param>
/// <returns>This batch, for the purposes of method chaining.</returns>
public WriteBatch Update(DocumentReference documentReference, IDictionary <FieldPath, object> updates, Precondition precondition = null)
{
GaxPreconditions.CheckNotNull(documentReference, nameof(documentReference));
GaxPreconditions.CheckNotNull(updates, nameof(updates));
var serializedUpdates = updates.ToDictionary(pair => pair.Key, pair => ValueSerializer.Serialize(pair.Value));
var deconstructed = ExpandObject(serializedUpdates);
// TODO: Validate that the precondition is reasonable (i.e. not "MustNotExist")?
var write = new Write
{
CurrentDocument = (precondition ?? Precondition.MustExist).Proto,
Update = new Document
{
Fields = { deconstructed },
Name = documentReference.Path,
},
UpdateMask = new DocumentMask {
FieldPaths = { serializedUpdates.Keys.Select(fp => fp.EncodedPath) }
}
};
AddUpdate(write);
return(this);
}
/// <summary>
/// Adds an operation to update a document's data in this transaction.
/// </summary>
/// <param name="documentReference">The document to update. Must not be null.</param>
/// <param name="updates">The updates to perform on the document, keyed by the field path to update. Fields not present in this dictionary are not updated. Must not be null.</param>
/// <param name="precondition">Optional precondition for updating the document. May be null, which is equivalent to <see cref="Precondition.MustExist"/>.</param>
public void Update(DocumentReference documentReference, Dictionary <FieldPath, object> updates, Precondition precondition = null)
{
// Preconditions are validated by WriteBatch.
_writes.Update(documentReference, updates, precondition);
}
/// <summary>
/// Adds an operation to delete a document's data in this transaction.
/// </summary>
/// <param name="documentReference">The document to delete. Must not be null.</param>
/// <param name="precondition">Optional precondition for deletion. May be null, in which case the deletion is unconditional.</param>
public void Delete(DocumentReference documentReference, Precondition precondition = null)
{
// Preconditions are validated by WriteBatch.
_writes.Delete(documentReference, precondition);
}
/// <summary>
/// Asynchronously performs a set of updates on the document referred to by this path, with an optional precondition.
/// </summary>
/// <param name="updates">The updates to perform on the document, keyed by the field path to update. Fields not present in this dictionary are not updated. Must not be null.</param>
/// <param name="precondition">Optional precondition for updating the document. May be null, which is equivalent to <see cref="Precondition.MustExist"/>.</param>
/// <param name="cancellationToken">A cancellation token to monitor for the asynchronous operation.</param>
/// <returns>The write result of the server operation.</returns>
public async Task <WriteResult> UpdateAsync(IDictionary <FieldPath, object> updates, Precondition precondition = null, CancellationToken cancellationToken = default)
{
var batch = Database.CreateWriteBatch();
batch.Update(this, updates, precondition);
var results = await batch.CommitAsync(cancellationToken).ConfigureAwait(false);
return(results[0]);
}