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fix+test: escape "_" symbol in tags filtering

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bigcat88
2025-09-15 17:29:27 +03:00
parent 5f187fe6fb
commit f3cf99d10c
4 changed files with 39 additions and 2 deletions
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2
app/database/helpers/__init__.py
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@@ -1,3 +1,4 @@
from .escape_like import escape_like_prefix
from .filters import apply_metadata_filter, apply_tag_filters
from .ownership import visible_owner_clause
from .projection import is_scalar, project_kv
@@ -10,6 +11,7 @@ from .tags import (
__all__ = [
"apply_tag_filters",
"apply_metadata_filter",
"escape_like_prefix",
"is_scalar",
"project_kv",
"ensure_tags_exist",

7
app/database/helpers/escape_like.py Normal file
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@@ -0,0 +1,7 @@
def escape_like_prefix(s: str, escape: str = "!") -> tuple[str, str]:
"""Escapes %, _ and the escape char itself in a LIKE prefix.
Returns (escaped_prefix, escape_char). Caller should append '%' and pass escape=escape_char to .like().
"""
s = s.replace(escape, escape + escape) # escape the escape char first
s = s.replace("%", escape + "%").replace("_", escape + "_") # escape LIKE wildcards
return s, escape