fix: on PostgreSQL, searching automations or filtering models by a non-ASCII word finds nothing (#31423)

On PostgreSQL with ENABLE_ORJSON off (the default), searching automations by a word from their prompt, or filtering models by a tag, found nothing when the word was non-ASCII, for example Chinese. SQLite, and PostgreSQL with ENABLE_ORJSON on, were fine. With the default setting non-ASCII text is saved as \uXXXX codes, and PostgreSQL reads the backslash in a search pattern as a special character, so the search never matched. Special characters in the search text are now taken literally, so these searches work on both databases, and a % or _ typed into them now matches only itself.

Fixes #31422

backend/open_webui/models/automations.py

@@ -195,7 +195,7 @@ class AutomationTable:
                 stmt = stmt.filter(
                     or_(
                         Automation.name.ilike(f'%{query}%'),
-                        *(data_text.ilike(f'%{variant}%') for variant in json_text_variants(query)),
+                        *(data_text.icontains(variant, autoescape=True) for variant in json_text_variants(query)),
                     )
                 )
 

backend/open_webui/models/models.py

@@ -392,7 +392,9 @@ class ModelsTable:
                     else:
                         meta_text = func.lower(cast(Model.meta, String))
                         variants = json_text_variants(tag.lower())
-                    stmt = stmt.filter(or_(*(meta_text.like(f'%"{variant}"%') for variant in variants)))
+                    stmt = stmt.filter(
+                        or_(*(meta_text.contains(f'"{variant}"', autoescape=True) for variant in variants))
+                    )
 
                 order_by = filter.get('order_by')
                 direction = filter.get('direction')

backend/open_webui/models/prompts.py

@@ -346,7 +346,10 @@ class PromptsTable:
                         # Fallback for dialects with no JSON array function: LIKE on the text.
                         tags_text = func.lower(cast(Prompt.tags, String))
                         tag_clause = or_(
-                            *(tags_text.like(f'%"{variant}"%') for variant in json_text_variants(tag_lower))
+                            *(
+                                tags_text.contains(f'"{variant}"', autoescape=True)
+                                for variant in json_text_variants(tag_lower)
+                            )
                         )
                         tag_lower = None