How to use the batch function from levelup

levelup.batch is a method in the LevelUP library that allows for multiple data manipulation operations to be executed in a single atomic batch.

How does levelup.batch work?

levelup.batch() is a method in the LevelUp library that allows for efficient execution of multiple database operations by batching them together into a single atomic write transaction. It accepts an array of operations and executes them as a single batch operation on the database, ensuring that either all or none of the operations succeed.

Ai Example

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const levelup = require("levelup");
const db = levelup("./mydb");

const batch = [
  { type: "put", key: "key1", value: "value1" },
  { type: "put", key: "key2", value: "value2" },
  { type: "del", key: "key3" },
];

db.batch(batch, (err) => {
  if (err) {
    console.error("Error in batch operation:", err);
    return;
  }
  console.log("Batch operation completed successfully.");
});

In this example, we first create a batch array that contains three objects. Each object specifies a key-value pair and the type of operation to be performed: put for inserting a new key-value pair and del for deleting an existing key-value pair. We then call the batch() method on the db instance and pass in the batch array as the first argument. This method performs the batch operation atomically, which means that all the operations in the batch array will be executed as a single transaction. If any of the operations fail, the entire batch will be rolled back. The second argument to batch() is a callback function that will be called after the batch operation completes. If there is an error, the callback will receive an err object; otherwise, it will be called with no arguments. In this example, we simply log a message to the console indicating whether the operation succeeded or failed.