Explicitly query case-insensitively

Use of Django filtering with `__contains` queries case-insensitively
on SQLite [0], but case-sensitively on PostgreSQL. In order to keep
case-insensitive search, this commit modifies the logic to use Django
`__icontains` instead [1].

[0] https://docs.djangoproject.com/en/5.1/ref/databases/#substring-matching-and-case-sensitivity
[1] https://docs.djangoproject.com/en/5.1/ref/models/querysets/#icontains

crawler/search.py

@@ -10,7 +10,7 @@
 
 def search_components(class_name_contains, include_class_names=False):
     queryset = Page.objects.prefetch_related("components").filter(
-        components__class_name__contains=class_name_contains
+        components__class_name__icontains=class_name_contains
     )
 
     values = _page_values
@@ -26,10 +26,10 @@ def search_components(class_name_contains, include_class_names=False):
 def search_links(href_contains, include_hrefs=False, or_urlencoded=True):
     queryset = Page.objects.prefetch_related("links")
 
-    href_filter = Q(links__href__contains=href_contains)
+    href_filter = Q(links__href__icontains=href_contains)
 
     if or_urlencoded:  # pragma: no branch
-        href_filter |= Q(links__href__contains=quote_plus(href_contains))
+        href_filter |= Q(links__href__icontains=quote_plus(href_contains))
 
     queryset = queryset.filter(href_filter)
 
@@ -52,16 +52,16 @@ def search_empty():
 
 
 def search_html(html_contains):
-    return _search_pages(html__contains=html_contains)
+    return _search_pages(html__icontains=html_contains)
 
 
 def search_text(text_contains):
-    return _search_pages(text__contains=text_contains)
+    return _search_pages(text__icontains=text_contains)
 
 
 def search_title(title_contains):
-    return _search_pages(title__contains=title_contains)
+    return _search_pages(title__icontains=title_contains)
 
 
 def search_url(url_contains):
-    return _search_pages(url__contains=url_contains)
+    return _search_pages(url__icontains=url_contains)

viewer/tests/test_views.py

@@ -56,11 +56,17 @@ def test_search_by_html(self):
         self.assertEqual(len(results), 1)
         self.assertEqual(results[0]["title"], "Sample homepage")
 
-    def test_search_by_text(self):
-        results = self.get_pages_api(search_type="text", q="Sample child page")
+    def check_search_by_text(self, q):
+        results = self.get_pages_api(search_type="text", q=q)
         self.assertEqual(len(results), 2)
         self.assertEqual(results[0]["title"], "Sample child page")
 
+    def test_search_by_text(self):
+        self.check_search_by_text("Sample child page")
+
+    def test_search_by_text_case_insensitive(self):
+        self.check_search_by_text("SAMPLE CHILD PAGE")
+
     def test_search_by_title(self):
         results = self.get_pages_api(search_type="title", q="Sample child page")
         self.assertEqual(len(results), 2)