Updating documents in Elasticsearch - Mini Project: Build & Apply

Updating documents in Elasticsearch

📖 Scenario: You are managing a small online store's product catalog stored in Elasticsearch. Sometimes, product details like price or stock need to be updated.

🎯 Goal: Learn how to update existing documents in Elasticsearch using the _update API with a script.

📋 What You'll Learn

Create an index with sample product documents

Set a variable for the product ID to update

Write an update request to change the product's price and stock

Print a success message to confirm the update

💡 Why This Matters

🌍 Real World

Updating product details like price and stock is common in online stores to keep information accurate.

💼 Career

Knowing how to update documents in Elasticsearch is important for roles involving search engines, data indexing, and real-time data updates.

1

Create the products index with sample documents

Create an index called products with two documents having IDs 1 and 2. Document 1 should have name as "Laptop", price as 1200, and stock as 30. Document 2 should have name as "Smartphone", price as 800, and stock as 50.

Elasticsearch

# Use the Elasticsearch bulk API to create the products index with two documents
# Your code here

Need a hint?

Use the _bulk API to add multiple documents at once with their IDs.

2

Set the product ID to update

Create a variable called product_id and set it to the string "1" to specify the product to update.

Elasticsearch

POST /products/_bulk
{ "index": { "_id": "1" } }
{ "name": "Laptop", "price": 1200, "stock": 30 }
{ "index": { "_id": "2" } }
{ "name": "Smartphone", "price": 800, "stock": 50 }

# Create a variable product_id and set it to "1"
# Your code here

Need a hint?

Just assign the string "1" to the variable product_id.

3

Write the update request to change price and stock

Write an Elasticsearch _update request for the document with ID 1. Use a script to set price to 1100 and stock to 25.

Elasticsearch

POST /products/_bulk
{ "index": { "_id": "1" } }
{ "name": "Laptop", "price": 1200, "stock": 30 }
{ "index": { "_id": "2" } }
{ "name": "Smartphone", "price": 800, "stock": 50 }

product_id = "1"

# Write the update request using _update API and a script to set price=1100 and stock=25
# Your code here

Need a hint?

Use the _update API with a script that sets ctx._source.price and ctx._source.stock to new values.

4

Print the update response

Print a success message to confirm the document was updated.

Elasticsearch

POST /products/_bulk
{ "index": { "_id": "1" } }
{ "name": "Laptop", "price": 1200, "stock": 30 }
{ "index": { "_id": "2" } }
{ "name": "Smartphone", "price": 800, "stock": 50 }

product_id = "1"

POST /products/_update/1
{
  "script": {
    "source": "ctx._source.price = params.price; ctx._source.stock = params.stock",
    "params": {
      "price": 1100,
      "stock": 25
    }
  }
}

# Print the update response
# Your code here

Need a hint?

Use a print statement to show a success message after the update.