Add support for CEL exists() comprehension with startsWith, endsWith, and
contains predicates to enable powerful tag filtering patterns.
Features:
- tags.exists(t, t.startsWith("prefix")) - Match tags by prefix
- tags.exists(t, t.endsWith("suffix")) - Match tags by suffix
- tags.exists(t, t.contains("substring")) - Match tags by substring
- Negation: !tags.exists(...) to exclude matching tags
- Works with all operators (AND, OR, NOT) and other filters
Implementation:
- Added ListComprehensionCondition IR type for comprehension expressions
- Parser detects exists() macro and extracts predicates
- Renderer generates optimized SQL for SQLite, MySQL, PostgreSQL
- Proper NULL/empty array handling across all database dialects
- Helper functions reduce code duplication
Design decisions:
- Only exists() supported (all() rejected at parse time with clear error)
- Only simple predicates (matches() excluded to avoid regex complexity)
- Fail-fast validation with helpful error messages
Tests:
- Comprehensive test suite covering all predicates and edge cases
- Tests for NULL/empty arrays, combined filters, negation
- Real-world use case test for Issue #5480 (archive workflow)
- All tests pass on SQLite, MySQL, PostgreSQL
Closes#5480
- Updated memo and reaction filtering logic to use a unified engine for compiling filter expressions into SQL statements.
- Removed redundant filter parsing and conversion code from ListMemoRelations, ListReactions, and ListAttachments methods.
- Introduced IDList and UIDList fields in FindMemo and FindReaction structs to support filtering by multiple IDs.
- Removed old filter test files for reactions and attachments, as the filtering logic has been centralized.
- Updated tests for memo filtering to reflect the new SQL statement compilation approach.
- Ensured that unsupported user filters return an error in ListUsers method.
Johnny
Copilot