Update rows in your table

Update data in your tables using Astra’s REST API.

After creating a table in your keyspace and adding rows, you can update data. Data can be replaced or partially updated. Two endpoints can be used, either the update rows endpoint or the replace rows endpoint.

In the REST API, adding new rows is initially done with a POST command. After a row is input, a PUT command is used to replace the row data, or a PATCH command can be can be used to replace only some of the row data.

Prerequisites

  1. Get your application token.

  2. Create a table in your keyspace.

  3. Add rows of data to your table.

Update data

Data changes, so often it is necessary to update an entire row. To update a row, send a PUT request to /api/rest/v2/keyspaces/{keyspace_name}/{table_name}/{path}. The {path} is comprised of the primary key values. In this example, the partition key is firstname "Mookie" and the clustering key is lastname "Betts"; thus, we use /Mookie/Betts as the {path} in our request.

  • cURL command (/v2)

  • Result

curl -s -L -X PUT 'http://$ASTRA_CLUSTER_ID-$ASTRA_REGION.apps.astra.datastax.com/api/rest/v2/keyspaces/users_keyspace/users/Mookie/Betts' \
-H "X-Cassandra-Token: $ASTRA_DB_APPLICATION_TOKEN" \
-H 'Content-Type: application/json' \
-d '{
    "email": "mookie.betts.new-email@gmail.com",
    "favorite_color": "red",
    "favorite_books": [ "Native Son", "The Color Purple" ],
    "top_three_tv_shows": [ "Supergirl", "The Magicians", "Agents of SHIELD" ],
    "evaluations": [ {"key":"2020", "value":"good"}, {"key":"2019", "value":"okay"} ],
    "current_country": [ "France", "2016-01-01", "2020-02-02" ],
    "address": { "street": "500 Central Ave", "city": "Albuquerque", "state": "New Mexico", "zip": "54321" }
}'
{
  "data": {
    "email": "mookie.betts.new-email@gmail.com",
    "favorite_color": "red",
    "favorite_books": [
      "Native Son",
      "The Color Purple"
    ],
    "top_three_tv_shows": [
      "Supergirl",
      "The Magicians",
      "Agents of SHIELD"
    ],
    "evaluations": [
      {
        "key": "2020",
        "value": "good"
      },
      {
        "key": "2019",
        "value": "okay"
      }
    ],
    "current_country": [
      "France",
      "2016-01-01",
      "2020-02-02"
    ],
    "address": {
      "street": "500 Central Ave",
      "city": "Albuquerque",
      "state": "New Mexico",
      "zip": "54321"
    }
  }
}

Updates are upserts. If the row doesn’t exist, it will be created. If it does exist, it will be updated with the new row data.

It is also possible to update only part of a row. To partially update, send a PATCH request to /api/rest/v2/keyspaces/{keyspace_name}/{table_name}/{path}. In this example, we realize we should not have changed the email address, and we want to only change that one column:

  • cURL command (/v2)

  • Result

curl -s -L -X PATCH 'http://$ASTRA_CLUSTER_ID-$ASTRA_REGION.apps.astra.datastax.com/api/rest/v2/keyspaces/users_keyspace/users/Mookie/Betts' \
-H "X-Cassandra-Token: $ASTRA_DB_APPLICATION_TOKEN" \
-H 'Content-Type: application/json' \
-d '{
    "email": "mookie.betts.email@email.com"
}'
{"data":{"email":"mookie.betts.email@email.com"}}