Pagination
Learn how to use pagination in the Seam API.
For endpoints that can return long lists of resources, using pagination makes your app faster and more efficient. The Seam API and our JavaScript, Python, PHP, and Ruby SDKs support pagination for list
endpoints.
To fetch and process resources across multiple pages in the Seam API, use the limit
and page_cursor
parameters, along with the pagination
response object. The pagination
object provides the following information:
next_page_cursor
String
Opaque value that you use to select the next page of results through the page_cursor
parameter.
has_next_page
Boolean
Indicates whether there is another page of results after this one.
next_page_url
String (URI)
URL to get the next page of results.
For pagination in the Seam SDKs, use the corresponding paginator class, for example, SeamPaginator
in the Seam JavaScript and Python SDKs and Paginator
in the Seam PHP and Ruby SDKs.
The following examples show you how to use pagination in a variety of scenarios:
Manually Fetch Pages
You can specify the number of records per page and the desired page of results. The first list
request returns the first set of records, as well as the pagination
object. If pagination.has_next_page
is true
, you can request an additional page of records. For all list
requests after the first, use the pagination.next_page_cursor
as the value for the page_cursor
parameter.
The following example gets the first page of 20 devices and then the second page of 20 devices:
Code:
paginator = seam.create_paginator(seam.devices.list, {"limit": 20})
devices, pagination = paginator.first_page()
if pagination.has_next_page:
more_devices, _ = paginator.next_page(pagination.next_page_cursor)
Output:
[
Device(
device_id='11111111-1111-1111-1111-444444444444',
...
),
...
]
Resume Pagination
You can get the first page on initial load, store the state, and then get the next page at a later time using the stored state.
The following example gets the first page of 20 records from the list of devices and, later, gets the next page of 20 devices:
Code:
# Get the first page.
params = {"limit": 20}
paginator = seam.create_paginator(seam.devices.list, params)
devices, pagination = paginator.first_page()
# Store the state, for example, in memory, a file, or a database.
pagination_state = {
"params": params,
"next_page_cursor": pagination.next_page_cursor,
"has_next_page": pagination.has_next_page,
}
with open("/tmp/seam_devices_list.json", "w") as f:
json.dump(pagination_state, f)
# Get the next page at a later time using the stored state.
with open("/tmp/seam_devices_list.json", "r") as f:
pagination_state = json.load(f)
if pagination_state.get("has_next_page"):
paginator = seam.create_paginator(
seam.devices.list, pagination_state["params"]
)
more_devices, _ = paginator.next_page(
pagination_state["next_page_cursor"]
)
Output:
[
Device(
device_id='11111111-1111-1111-1111-444444444444',
...
),
...
]
[
Device(
device_id='11111111-1111-1111-2222-444444444444',
...
),
...
]
Iterate Over All Pages
You can iterate over all pages of records.
The following example uses a loop to get all pages of records for a list of 65 devices, at 20 records per page:
Code:
pages = seam.create_paginator(
seam.devices.list(
limit=20
)
)
for devices in pages:
pprint(f"There are {len(devices)} devices on this page.")
Output:
There are 20 devices on this page.
There are 20 devices on this page.
There are 20 devices on this page.
There are 5 devices on this page.
Iterate Over All Resources
You can iterate over all resources within all pages.
The following example uses a loop to get all records for a list of devices, at 20 records per page, and then prints out the device ID for each record:
Code:
paginator = seam.create_paginator(seam.devices.list, {"limit": 20})
for device in paginator.flatten():
print(device.device_id)
Output:
'11111111-1111-1111-1111-444444444444'
'11111111-1111-1111-2222-444444444444'
...
Return All Resources Across All Pages as an Array
You can iterate over all resources within all pages and return a single array or list.
The following example returns an array containing all devices:
Code:
paginator = seam.create_paginator(seam.devices.list, {"limit": 20})
all_devices = paginator.flatten_to_list()
Output:
[
Device(
device_id='11111111-1111-1111-1111-444444444444',
...
),
Device(
device_id='11111111-1111-1111-2222-444444444444',
...
),
...
]
Last updated
Was this helpful?