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reinhardt
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feat(pat-autosuggest): Add batching support for AJAX requests.
This PR introduces three new options for that: max-initial-size: Defines the batch size for the initial request (default: 10). ajax-batch-size: Defines the batch size for subsequent requests (default: 10). ajax-timeout: Defines the timeout in milliseconds before a AJAX request is submitted. (default: 400). Ref: scrum-1638
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‎src/pat/auto-suggest/auto-suggest.js

Lines changed: 51 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -11,7 +11,10 @@ const log = logging.getLogger("autosuggest");
1111
export const parser = new Parser("autosuggest");
1212
parser.addArgument("ajax-data-type", "JSON");
1313
parser.addArgument("ajax-search-index", "");
14+
parser.addArgument("ajax-timeout", 400);
1415
parser.addArgument("ajax-url", "");
16+
parser.addArgument("max-initial-size", 10); // AJAX search results limit for the first page.
17+
parser.addArgument("ajax-batch-size", 0); // AJAX search results limit for subsequent pages.
1518
parser.addArgument("allow-new-words", true); // Should custom tags be allowed?
1619
parser.addArgument("max-selection-size", 0);
1720
parser.addArgument("minimum-input-length"); // Don't restrict by default so that all results show
@@ -54,10 +57,11 @@ export default Base.extend({
5457
separator: this.options.valueSeparator,
5558
tokenSeparators: [","],
5659
openOnEnter: false,
57-
maximumSelectionSize: this.options.maxSelectionSize,
60+
maximumSelectionSize: this.options.max["selection-size"],
5861
minimumInputLength: this.options.minimumInputLength,
5962
allowClear:
60-
this.options.maxSelectionSize === 1 && !this.el.hasAttribute("required"),
63+
this.options.max["selection-size"] === 1 &&
64+
!this.el.hasAttribute("required"),
6165
};
6266
if (this.el.hasAttribute("readonly")) {
6367
config.placeholder = "";
@@ -179,7 +183,7 @@ export default Base.extend({
179183
// Even if words was [], we would get a tag stylee select
180184
// That was then properly working with ajax if configured.
181185

182-
if (this.options.maxSelectionSize === 1) {
186+
if (this.options.max["selection-size"] === 1) {
183187
config.data = words;
184188
// We allow exactly one value, use dropdown styles. How do we feed in words?
185189
} else {
@@ -198,7 +202,7 @@ export default Base.extend({
198202
for (const value of values) {
199203
data.push({ id: value, text: value });
200204
}
201-
if (this.options.maxSelectionSize === 1) {
205+
if (this.options.max["selection-size"] === 1) {
202206
data = data[0];
203207
}
204208
callback(data);
@@ -234,7 +238,7 @@ export default Base.extend({
234238
_data.push({ id: d, text: data[d] });
235239
}
236240
}
237-
if (this.options.maxSelectionSize === 1) {
241+
if (this.options.max["selection-size"] === 1) {
238242
_data = _data[0];
239243
}
240244
callback(_data);
@@ -253,19 +257,36 @@ export default Base.extend({
253257
url: this.options.ajax.url,
254258
dataType: this.options.ajax["data-type"],
255259
type: "GET",
256-
quietMillis: 400,
260+
quietMillis: this.options.ajax.timeout,
257261
data: (term, page) => {
258-
return {
262+
const request_data = {
259263
index: this.options.ajax["search-index"],
260264
q: term, // search term
261-
page_limit: 10,
262265
page: page,
263266
};
267+
268+
const page_limit = this.page_limit(page);
269+
if (page_limit > 0) {
270+
request_data.page_limit = page_limit;
271+
}
272+
273+
return request_data;
264274
},
265275
results: (data, page) => {
266-
// parse the results into the format expected by Select2.
276+
// Parse the results into the format expected by Select2.
267277
// data must be a list of objects with keys "id" and "text"
268-
return { results: data, page: page };
278+
279+
// Check whether there are more results to come.
280+
// There are maybe more results if the number of
281+
// items is the same as the batch-size.
282+
// We expect the backend to return an empty list if
283+
// a batch page is requested where there are no
284+
// more results.
285+
const page_limit = this.page_limit(page);
286+
const load_more = page_limit > 0 &&
287+
data &&
288+
Object.keys(data).length >= page_limit;
289+
return { results: data, page: page, more: load_more };
269290
},
270291
},
271292
},
@@ -275,6 +296,26 @@ export default Base.extend({
275296
return config;
276297
},
277298

299+
page_limit(page) {
300+
/* Return the page limit based on the current page.
301+
*
302+
* If no `ajax-batch-size` is set, batching is disabled but we can
303+
* still define the number of items to be shown on the first page with
304+
* `max-initial-size`.
305+
*
306+
* @param {number} page - The current page number.
307+
* @returns {number} - The page limit.
308+
*/
309+
310+
// Page limit for the first page of a batch.
311+
const initial_size = this.options.max["initial-size"] || 0;
312+
313+
// Page limit for subsequent pages.
314+
const batch_size = this.options.ajax["batch-size"] || 0;
315+
316+
return page === 1 ? initial_size : batch_size;
317+
},
318+
278319
destroy($el) {
279320
$el.off(".pat-autosuggest");
280321
$el.select2("destroy");

‎src/pat/auto-suggest/auto-suggest.test.js

Lines changed: 204 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -5,6 +5,26 @@ import utils from "../../core/utils";
55
import registry from "../../core/registry";
66
import { jest } from "@jest/globals";
77

8+
// Need to import for the ajax mock to work.
9+
import "select2";
10+
11+
const mock_fetch_ajax = (...data) => {
12+
// Data format: [{id: str, text: str}, ... ], ...
13+
// first batch ^ ^ second batch
14+
15+
// NOTE: You need to add a trailing comma if you add only one argument to
16+
// make the multi-argument dereferencing work.
17+
18+
// Mock Select2
19+
$.fn.select2.ajaxDefaults.transport = jest.fn().mockImplementation((opts) => {
20+
// Get the batch page
21+
const page = opts.data.page - 1;
22+
23+
// Return the data for the batch
24+
return opts.success(data[page]);
25+
});
26+
};
27+
828
var testutils = {
929
createInputElement: function (c) {
1030
var cfg = c || {};
@@ -545,4 +565,188 @@ describe("pat-autosuggest", function () {
545565
expect(selected.length).toBe(0);
546566
});
547567
});
568+
569+
describe("6 - AJAX tests", function () {
570+
it("6.1 - AJAX works with a simple data structure.", async function () {
571+
mock_fetch_ajax(
572+
[
573+
{ id: "1", text: "apple" },
574+
{ id: "2", text: "orange" },
575+
] // Note the trailing comma to make the multi-argument dereferencing work.
576+
);
577+
578+
document.body.innerHTML = `
579+
<input
580+
type="text"
581+
class="pat-autosuggest"
582+
data-pat-autosuggest="
583+
ajax-url: http://test.org/test;
584+
ajax-timeout: 1;
585+
" />
586+
`;
587+
588+
const input = document.querySelector("input");
589+
new pattern(input);
590+
await utils.timeout(1); // wait a tick for async to settle.
591+
592+
$(".select2-input").click();
593+
await utils.timeout(1); // wait for ajax to finish.
594+
595+
const results = $(document.querySelectorAll(".select2-results li"));
596+
expect(results.length).toBe(2);
597+
598+
$(results[0]).mouseup();
599+
600+
const selected = document.querySelectorAll(".select2-search-choice");
601+
expect(selected.length).toBe(1);
602+
expect(selected[0].textContent.trim()).toBe("apple");
603+
expect(input.value).toBe("1");
604+
});
605+
606+
// This test is so flaky, just skip it if it fails.
607+
it.skip.failing("6.2 - AJAX works with batches.", async function () {
608+
mock_fetch_ajax(
609+
[
610+
{ id: "1", text: "one" },
611+
{ id: "2", text: "two" },
612+
{ id: "3", text: "three" },
613+
{ id: "4", text: "four" },
614+
],
615+
[
616+
{ id: "5", text: "five" },
617+
{ id: "6", text: "six" },
618+
],
619+
[{ id: "7", text: "seven" }]
620+
);
621+
622+
document.body.innerHTML = `
623+
<input
624+
type="text"
625+
class="pat-autosuggest"
626+
data-pat-autosuggest="
627+
ajax-url: http://test.org/test;
628+
ajax-timeout: 1;
629+
max-initial-size: 4;
630+
ajax-batch-size: 2;
631+
" />
632+
`;
633+
634+
const input = document.querySelector("input");
635+
new pattern(input);
636+
await utils.timeout(1); // wait a tick for async to settle.
637+
638+
// Load batch 1 with batch size 4
639+
$(".select2-input").click();
640+
await utils.timeout(1); // wait for ajax to finish.
641+
642+
const results_1 = $(
643+
document.querySelectorAll(".select2-results .select2-result")
644+
);
645+
expect(results_1.length).toBe(4);
646+
647+
const load_more_1 = $(
648+
document.querySelectorAll(".select2-results .select2-more-results")
649+
);
650+
expect(load_more_1.length).toBe(1);
651+
652+
// Load batch 2 with batch size 2
653+
$(load_more_1[0]).mouseup();
654+
// NOTE: Flaky behavior needs multiple timeouts 👌
655+
await utils.timeout(1); // wait for ajax to finish.
656+
await utils.timeout(1); // wait for ajax to finish.
657+
await utils.timeout(1); // wait for ajax to finish.
658+
await utils.timeout(1); // wait for ajax to finish.
659+
660+
const results_2 = $(
661+
document.querySelectorAll(".select2-results .select2-result")
662+
);
663+
console.log(document.body.innerHTML);
664+
expect(results_2.length).toBe(6);
665+
666+
const load_more_2 = $(
667+
document.querySelectorAll(".select2-results .select2-more-results")
668+
);
669+
expect(load_more_2.length).toBe(1);
670+
671+
// Load final batch 2
672+
$(load_more_2[0]).mouseup();
673+
// NOTE: Flaky behavior needs multiple timeouts 🤘
674+
await utils.timeout(1); // wait for ajax to finish.
675+
await utils.timeout(1); // wait for ajax to finish.
676+
await utils.timeout(1); // wait for ajax to finish.
677+
await utils.timeout(1); // wait for ajax to finish.
678+
679+
const results_3 = $(
680+
document.querySelectorAll(".select2-results .select2-result")
681+
);
682+
expect(results_3.length).toBe(7);
683+
684+
const load_more_3 = $(
685+
document.querySelectorAll(".select2-results .select2-more-results")
686+
);
687+
expect(load_more_3.length).toBe(0);
688+
});
689+
690+
describe("6.3 - Test the page_limit logic.", function () {
691+
692+
it("6.3.1 - page_limit set only by ajax-batch-size.", async function () {
693+
document.body.innerHTML = `
694+
<input
695+
type="text"
696+
class="pat-autosuggest"
697+
data-pat-autosuggest="
698+
ajax-url: http://test.org/test;
699+
ajax-batch-size: 2;
700+
" />
701+
`;
702+
703+
const input = document.querySelector("input");
704+
const instance = new pattern(input);
705+
await utils.timeout(1); // wait a tick for async to settle.
706+
707+
expect(instance.page_limit(1)).toBe(10);
708+
expect(instance.page_limit(2)).toBe(2);
709+
});
710+
711+
it("6.3.2 - page_limit set by ajax-batch-size and max-initial-size.", async function () {
712+
document.body.innerHTML = `
713+
<input
714+
type="text"
715+
class="pat-autosuggest"
716+
data-pat-autosuggest="
717+
ajax-url: http://test.org/test;
718+
ajax-batch-size: 2;
719+
max-initial-size: 4;
720+
" />
721+
`;
722+
723+
const input = document.querySelector("input");
724+
const instance = new pattern(input);
725+
await utils.timeout(1); // wait a tick for async to settle.
726+
727+
expect(instance.page_limit(1)).toBe(4);
728+
expect(instance.page_limit(2)).toBe(2);
729+
});
730+
731+
it("6.3.3 - page_limit set only by max-initial-size and batching not activated.", async function () {
732+
document.body.innerHTML = `
733+
<input
734+
type="text"
735+
class="pat-autosuggest"
736+
data-pat-autosuggest="
737+
ajax-url: http://test.org/test;
738+
max-initial-size: 4;
739+
" />
740+
`;
741+
742+
const input = document.querySelector("input");
743+
const instance = new pattern(input);
744+
await utils.timeout(1); // wait a tick for async to settle.
745+
746+
expect(instance.page_limit(1)).toBe(4);
747+
expect(instance.page_limit(2)).toBe(0);
748+
});
749+
750+
});
751+
});
548752
});

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