Update documents (C#)
Finds documents in a collection using filter clauses, and then updates properties in those documents. Optionally, if no document matches the filter, inserts a new document.
This method does not support sort parameters, including vector search.
If you want to use sort parameters to find documents, use the method to find documents instead.
Then, use the method to update a single document to update the found documents by ID.
|
Ready to write code? See the examples for this method to get started. If you are new to the Data API, check out the quickstart. |
Result
Updates documents that match the specified parameters and returns an UpdateResult object, which indicates the number of documents that were found and the number of documents that were modified.
If specified, the method inserts a new document if no document matches the filter.
In this case, the response also includes the _id of the inserted document.
Parameters
Use the UpdateManyAsync method, which belongs to the Collection class.
You can also use UpdateMany, which is the synchronous version of the method.
Method signature
public Task<UpdateResult> UpdateManyAsync(
CollectionFilter<T> filter,
UpdateBuilder<T> update,
CollectionUpdateManyOptions options = null
);| Name | Type | Summary |
|---|---|---|
|
|
An object that defines filter criteria using the Data API filter syntax. The method only finds documents that match the filter criteria. Filters can improve performance by reducing the number of documents that the Data API processes. You must use For a list of available filter operators and more examples, see Filter operators for collections (C#). Filters can use only indexed fields. If you apply selective indexing when you create a collection, you cannot reference non-indexed fields in a filter. For an example, see Update documents that match a filter. |
|
|
Defines the updates using Data API operators. For a list of available operators and more examples, see Update operators for collections (C#). |
|
Optional.
Options for this operation.
For more information and examples for general options such as timeout, see Customize API interaction.
For options specific to this method, see Method-specific properties of the |
| Name | Type | Summary |
|---|---|---|
|
|
Optional. Whether to insert a new document if no document matches the filter criteria. For an example, see Insert a new document if no matching document exists. Default: false |
Examples
The following examples demonstrate how to update documents in a collection.
Update documents that match a filter
You can use a filter to find documents that match specific criteria.
For example, you can find documents with an is_checked_out value of false and a number_of_pages value less than 300.
For a list of available filter operators and more examples, see Filter operators for collections (C#).
Filters can use only indexed fields. If you apply selective indexing when you create a collection, you cannot reference non-indexed fields in a filter.
The following example uses untyped documents, but you can use strongly-typed classes for compile-time checks and IntelliSense. For more information and examples, see Custom typing for collections.
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update documents
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("is_checked_out", false),
filterBuilder.Lt("number_of_pages", 300)
);
var update = Builders<Document>.CollectionUpdate.Set("color", "blue");
var result = await collection.UpdateManyAsync(filter, update);
Console.WriteLine(result.MatchedCount);
Console.WriteLine(result.ModifiedCount);
}
}Update multiple properties
You can combine multiple operators and properties in a single call. For the full list of operators, see Update operators for collections (C#).
The following example uses untyped documents, but you can use strongly-typed classes for compile-time checks and IntelliSense. For more information and examples, see Custom typing for collections.
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update documents
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("is_checked_out", false),
filterBuilder.Lt("number_of_pages", 300)
);
var updater = Builders<Document>.CollectionUpdate;
var update = updater
.Set("color", "blue")
.Set("classes", new[] { "biology", "algebra", "swimming" })
.Unset("phone")
.Increment("age", 1);
var result = await collection.UpdateManyAsync(filter, update);
Console.WriteLine(result.MatchedCount);
Console.WriteLine(result.ModifiedCount);
}
}Update nested properties
To update a nested property, use dot notation.
For example, field.subfield.subsubfield.
To update an item in a list, specify a numeric index.
For example, listProperty.3.
The following example uses untyped documents, but you can use strongly-typed classes for compile-time checks and IntelliSense. For more information and examples, see Custom typing for collections.
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update a document
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("is_checked_out", false),
filterBuilder.Lt("number_of_pages", 300)
);
var updater = Builders<Document>.CollectionUpdate;
var update = updater
.Set("color", "blue")
.Set("address.city", "Austin")
.Set("classes.2", "biology");
var result = await collection.UpdateManyAsync(filter, update);
Console.WriteLine(result.MatchedCount);
Console.WriteLine(result.ModifiedCount);
}
}Insert a new document if no matching document exists
You can use upsert to insert a new document if no document matches the filter criteria.
In addition to any fields you explicitly set in the update parameter, the new document also includes any top-level equality conditions from the filter parameter.
Equality conditions that are nested within $and from the filter parameter are not included.
If a field is defined both in the filter and in the update, the explicitly set value takes precedence.
The following example uses untyped documents, but you can use strongly-typed classes for compile-time checks and IntelliSense. For more information and examples, see Custom typing for collections.
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
using DataStax.AstraDB.DataApi.Core.Query;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update a document
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("is_checked_out", false),
filterBuilder.Lt("number_of_pages", 300)
);
var update = Builders<Document>.CollectionUpdate.Set("color", "blue");
var updateOptions = new CollectionUpdateManyOptions()
{
Upsert = true,
};
var result = await collection.UpdateManyAsync(
filter,
update,
updateOptions
);
Console.WriteLine(result.MatchedCount);
Console.WriteLine(result.ModifiedCount);
Console.WriteLine(result.UpsertedId);
}
}You can also use the setOnInsert operator to specify additional fields to set if a new document is created:
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
using DataStax.AstraDB.DataApi.Core.Query;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update a document
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("is_checked_out", false),
filterBuilder.Lt("number_of_pages", 300)
);
var update = Builders<Document>
.CollectionUpdate.Set("color", "blue")
.SetOnInsert("customer.name", "James");
var updateOptions = new CollectionUpdateManyOptions()
{
Upsert = true,
};
var result = await collection.UpdateManyAsync(
filter,
update,
updateOptions
);
Console.WriteLine(result.MatchedCount);
Console.WriteLine(result.ModifiedCount);
Console.WriteLine(result.UpsertedId);
}
}Update more than 20 documents
The client automatically issues multiple Data API HTTP requests to update all documents that match your filter.
Work with . and & in field names
You must use & to escape any . or & in field names when the field is used in a filter, sort, projection, update, or indexing clause.
Dot notation, which is used to reference nested fields, should not be escaped.
For more information, see Work with . and & in field names (C#).
For example, in the following document, you would use escaping like this: areas.r&&d, costs.price&.usd, and costs.price&.cad.
{
"areas": {
"r&d": true,
"design": false
},
"costs": {
"price.usd": 100,
"price.cad": 90
}
}using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update a document
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq("areas.r&&d", false),
filterBuilder.Lt("costs.price&.usd", 300)
);
var updater = Builders<Document>.CollectionUpdate;
var update = updater
.Set("areas.r&&d", true)
.Set("costs.price&.usd", 310);
var result = await collection.UpdateManyAsync(filter, update);
Console.WriteLine(JsonSerializer.Serialize(result));
}
}You can also use the EscapeFieldNames function provided by the client:
using System.Text.Json;
using DataStax.AstraDB.DataApi;
using DataStax.AstraDB.DataApi.Collections;
using DataStax.AstraDB.DataApi.Core;
using DataStax.AstraDB.DataApi.Utils;
namespace Examples;
public class Program
{
static async Task Main()
{
// Get an existing collection
var client = new DataAPIClient();
var database = client.GetDatabase(
"API_ENDPOINT",
"APPLICATION_TOKEN"
);
var collection = database.GetCollection("COLLECTION_NAME");
// Update a document
var filterBuilder = Builders<Document>.CollectionFilter;
var filter = filterBuilder.And(
filterBuilder.Eq(
FieldEscaping.EscapeFieldNames("areas", "r&d"),
false
),
filterBuilder.Lt(
FieldEscaping.EscapeFieldNames("costs", "price.usd"),
300
)
);
var updater = Builders<Document>.CollectionUpdate;
var update = updater
.Set(FieldEscaping.EscapeFieldNames("areas", "r&d"), true)
.Set(FieldEscaping.EscapeFieldNames("costs", "price.usd"), 310);
var result = await collection.UpdateManyAsync(filter, update);
Console.WriteLine(JsonSerializer.Serialize(result));
}
}Client reference
For more information, see the client reference.
