How to implement pagination in Rest API

Pagination is a technique used to split a large result set into smaller chunks, or "pages", that can be more easily consumed by clients. Implementing pagination in a REST API involves the following steps:

1. Add query parameters to allow clients to specify the page size and the page number: The page query parameter can be used to specify the page number, and the page_size query parameter can be used to specify the number of results per page.

2. Implement server-side logic to calculate the offset and limit based on the page size and page number: The offset is the number of results to skip, and the limit is the maximum number of results to return. These values can be calculated using the following formulas:

offset = (page - 1) * page_size
limit = page_size


1. Execute the database query with the calculated offset and limit: Use the offset and limit values to execute a database query that returns the appropriate results for the current page.

2. Return the paginated results to the client: In the response, include the total number of results, the page size, and the current page number. You can also include links to the previous and next pages, if applicable.
   Here is an example of a paginated REST API endpoint that returns a list of users:
   

GET /users?page=2&page_size=10

{
  "total": 100,
  "page_size": 10,
  "page": 2,
  "prev_page": "/users?page=1&page_size=10",
  "next_page": "/users?page=3&page_size=10",
  "results": [
    { "id": 11, "name": "User 11" },
    { "id": 12, "name": "User 12" },
    // ...
  ]
}

I hope this helps to give you an understanding of how to implement pagination in a REST API. Let me know if you have any questions!