50-Loop-get-Details.yaml

# yaml-language-server: $schema=https://www.membrane-api.io/v7.1.2.json
#
#
# Tutorial: For Loop
#
# Fetches a list of products from:
#   https://api.predic8.de/shop/v2/products
# The list contains ids and names, but no prices. The gateway then loops over
# the list and fetches the price for each product via:
#   https://api.predic8.de/shop/v2/products/{id}
#
# Try:
#    curl localhost:2000

api:
  port: 2000
  flow:
    - request:
        # Fetch a list of products without price information
        - call:
            url: https://api.predic8.de/shop/v2/products?limit=7
        # Iterate over the products array in the response
        - for:
            in: $.products
            language: jsonpath
            flow:
              - log:
                  message: 'Fetching price for: ${it["name"]}'
              - call:
                  url: https://api.predic8.de${it['self_link']}
              # Collect name and price in a result list
              - groovy:
                  src: |
                    property.res = property.res ?: []
                    property.res.add(
                      [ "name": it['name'],
                        "price": fn.jsonPath('$.price')
                      ])
        # Render the aggregated result as JSON
        - template:
            contentType: application/json
            pretty: true
            src: |
              {
                  "products": <%= property.res %>
              }
    - return:
        status: 200