Fix form options source query parameters (#1356)

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## unreleased
 
  - `sqlpage.send_mail` now supports rich email bodies. Use `body_html` for a caller-provided HTML alternative, or `body_md` to render Markdown as HTML. Messages retain a plain-text alternative; `body` may be omitted when `body_md` is used, and `body_md` and `body_html` cannot be combined.
+ - Form `options_source` URLs now preserve existing query parameters when adding the dynamic `search` parameter.
 
 ## v0.45
 

examples/official-site/sqlpage/migrations/01_documentation.sql

@@ -442,6 +442,8 @@ We''ll write a second SQL file, `options_source.sql`, that will receive the user
 
 When both `options` and `options_source` are set, the local `options` are loaded first. Search results from `options_source` are loaded into the same option list; a result with the same `value` updates the existing option. This is useful to set a default preselected value with `options_source`.
 
+`options_source` may already contain query parameters. SQLPage preserves them and adds or replaces the `search` parameter when loading options.
+
 ##### `options_source.sql`
 
 ```sql
@@ -458,7 +460,7 @@ where label like $search || ''%'';
     {"name": "component", "type": "select",
     "value": "form",
     "options": [{"label": "Form", "value": "form"}],
-    "options_source": "examples/from_component_options_source.sql",
+    "options_source": "examples/from_component_options_source.sql?category=component",
     "description": "Start typing the name of a component like ''map'' or ''form''..."
     }]')),
     ('form', 'This example illustrates the use of the `radio` type.

sqlpage/tomselect.js

@@ -53,9 +53,9 @@ function sqlpage_load_options_source(options_source) {
   if (!options_source) return;
   return async (query, callback) => {
     const err = (label) => callback([{ label, value: "" }]);
-    const resp = await fetch(
-      `${options_source}?search=${encodeURIComponent(query)}`,
-    );
+    const options_url = new URL(options_source, document.baseURI);
+    options_url.searchParams.set("search", query);
+    const resp = await fetch(options_url);
     if (!resp.ok) {
       return err(
         `Error loading options from "${options_source}": ${resp.status} ${resp.statusText}`,

tests/end-to-end/official-site.spec.ts

@@ -213,14 +213,14 @@ test("form select combines initial options with remote search results", async ({
 
   const select = page
     .locator(
-      'select[data-options_source="examples/from_component_options_source.sql"]',
+      'select[data-options_source="examples/from_component_options_source.sql?category=component"]',
     )
     .first();
   await expect(select).toBeAttached();
   await page.waitForFunction(
     () =>
       !!document.querySelector<HTMLSelectElement>(
-        'select[data-options_source="examples/from_component_options_source.sql"]',
+        'select[data-options_source="examples/from_component_options_source.sql?category=component"]',
       )?.tomselect,
   );
 
@@ -246,7 +246,9 @@ test("form select combines initial options with remote search results", async ({
   await page.waitForResponse((response) =>
     response
       .url()
-      .includes("examples/from_component_options_source.sql?search=form"),
+      .includes(
+        "examples/from_component_options_source.sql?category=component&search=form",
+      ),
   );
   await expect
     .poll(async () =>
@@ -265,7 +267,9 @@ test("form select combines initial options with remote search results", async ({
   await page.waitForResponse((response) =>
     response
       .url()
-      .includes("examples/from_component_options_source.sql?search=map"),
+      .includes(
+        "examples/from_component_options_source.sql?category=component&search=map",
+      ),
   );
   await expect
     .poll(async () =>