While fetching data from rest api (shopify API) in data flow, how to loop to next pages

Question

While fetching data from rest api (shopify API) in data flow, how to loop to next pages

Prakatheeswari 20

I have a data flow and in that I am trying to fetch data from Shopify API, flatten it and then put it into my db. User's image

This is my data flow. I only get records from the source as the limit is 50 per page. In header I have link which has url for the next page, it has page info and rel = 'next'. So I have call this url untill the rel gets the value 'prev'. Please tell me how to loop through pages and get all data in data flow.

phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-23T10:53:13.7133333+00:00
@Prakatheeswari

Thanks for reaching out to Microsoft Q&A.

Here’s a high-level approach to handle pagination in your data flow:

Initialize your API call: Start by making the first API call to Shopify and fetch the first page of data.

Check for Pagination: After each API call, check the response headers for the ‘Link’ header. The presence of ‘rel=next’ indicates there are more pages to fetch.

Extract Next Page URL: If ‘rel=next’ is found, extract the next page URL from the ‘Link’ header.

Loop Until ‘rel=prev’: Continue this process, making a new API call with the next page URL and checking for ‘rel=next’ after each call, until ‘rel=prev’ is found. This indicates you’ve reached the last page.

Process the Data: In each iteration, after fetching the data, you can then flatten it and load it into your database as per your existing data flow.

Please note that this is a general approach and you might need to adjust it according to the specific requirements of the Shopify API and your database. Also, always ensure to handle potential errors and edge cases to make your data flow robust.

if the issue is not resolved please provide more details. on your ask
Prakatheeswari 20 Reputation points

2024-02-23T18:48:57.57+00:00

Thank you. Can you please tell me how to loop the data flow sink part?
phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-26T09:33:45.71+00:00
@Prakatheeswari

In a typical data flow, the “sink” part is where you store or output your data, such as writing to a database or a file. If you’re looking to loop through the sink part, it might mean you want to write each page of data to your database as you fetch it. Here’s a simplified example of how you might do this:

def fetch_and_store_data(url): # Fetch the data from the url data = fetch_from_url(url) # Process your data here # ... # Write the processed data to your database write_to_database(data) # Check the headers for the 'Link' field link_header = get_link_header(url) # If 'rel=next' is found in the Link header, there is more data to fetch if 'rel="next"' in link_header: # Extract the next page URL from the Link header next_url = extract_next_url(link_header) # Recursively fetch the next page and store the data fetch_and_store_data(next_url) # Start fetching and storing data fetch_and_store_data(start_url)

In this example, write_to_database(data) represents the “sink” part of your data flow. This function should contain the logic to write your processed data to your database. You’ll need to replace this, along with the other functions like fetch_from_url, get_link_header, and extract_next_url, with your actual implementation. Remember to handle possible exceptions, such as network errors or rate limits from the Shopify API, and ensure your database writes are successful.
phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-27T14:32:05.6233333+00:00

@Prakatheeswari We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

Your answer

phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-23T10:53:13.7133333+00:00

@Prakatheeswari

Thanks for reaching out to Microsoft Q&A.

Here’s a high-level approach to handle pagination in your data flow:

Initialize your API call: Start by making the first API call to Shopify and fetch the first page of data.

Check for Pagination: After each API call, check the response headers for the ‘Link’ header. The presence of ‘rel=next’ indicates there are more pages to fetch.

Extract Next Page URL: If ‘rel=next’ is found, extract the next page URL from the ‘Link’ header.

Loop Until ‘rel=prev’: Continue this process, making a new API call with the next page URL and checking for ‘rel=next’ after each call, until ‘rel=prev’ is found. This indicates you’ve reached the last page.

Process the Data: In each iteration, after fetching the data, you can then flatten it and load it into your database as per your existing data flow.

Please note that this is a general approach and you might need to adjust it according to the specific requirements of the Shopify API and your database. Also, always ensure to handle potential errors and edge cases to make your data flow robust.

if the issue is not resolved please provide more details. on your ask
Prakatheeswari 20 Reputation points

2024-02-23T18:48:57.57+00:00

Thank you. Can you please tell me how to loop the data flow sink part?
phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-26T09:33:45.71+00:00

@Prakatheeswari

In a typical data flow, the “sink” part is where you store or output your data, such as writing to a database or a file. If you’re looking to loop through the sink part, it might mean you want to write each page of data to your database as you fetch it. Here’s a simplified example of how you might do this:

def fetch_and_store_data(url): # Fetch the data from the url data = fetch_from_url(url) # Process your data here # ... # Write the processed data to your database write_to_database(data) # Check the headers for the 'Link' field link_header = get_link_header(url) # If 'rel=next' is found in the Link header, there is more data to fetch if 'rel="next"' in link_header: # Extract the next page URL from the Link header next_url = extract_next_url(link_header) # Recursively fetch the next page and store the data fetch_and_store_data(next_url) # Start fetching and storing data fetch_and_store_data(start_url)

In this example, write_to_database(data) represents the “sink” part of your data flow. This function should contain the logic to write your processed data to your database. You’ll need to replace this, along with the other functions like fetch_from_url, get_link_header, and extract_next_url, with your actual implementation. Remember to handle possible exceptions, such as network errors or rate limits from the Shopify API, and ensure your database writes are successful.
phemanth 15,755 Reputation points Microsoft External Staff Moderator

2024-02-27T14:32:05.6233333+00:00

@Prakatheeswari We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

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While fetching data from rest api (shopify API) in data flow, how to loop to next pages

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