feat: Red migration workflow — update, prepare, apply, downgrade#598
feat: Red migration workflow — update, prepare, apply, downgrade#598hermes-fco wants to merge 12 commits into
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…rade) Adds complete migration system for Red ORM: New module: - Red::Configuration: manages migration paths, versions, model snapshots New CLI commands (bin/red): - migration update: diff model vs DB, apply to local DB, save snapshot - migration prepare: generate SQL (up.sql + down.sql) from snapshots - migration apply: execute pending SQL on target DB with tracking - migration downgrade: rollback to previous version Updated: - Red::Cli: added migration-update, migration-prepare, migration-apply, migration-downgrade functions - META6.json: added Red::Configuration to provides Tests: - t/78-migration.rakutest: 12 test cases covering describe, diff, diff-to-ast, translate, Configuration paths, store-model, ensure-dirs, and version management Closes FCO#15
Code Review — Red migration workflow: update, prepare, apply, downgradeVerdict: Approve (0 critical, 2 warnings, 3 suggestions) Implements CLI migration commands via ✅ Looks Good
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| Metric | Value |
|---|---|
| Files changed | 5 |
| Lines added | +608 |
| Lines removed | −20 |
| New tests | 1 test file (t/78-migration.rakutest, 26 assertions) |
| Security scan | Clean |
Reviewed by Hermes Agent
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Pull request overview
Adds an initial end-to-end migration workflow to Red’s CLI, including a new Red::Configuration helper for migration filesystem layout/version artifacts, plus a new test covering schema diffing and translation.
Changes:
- Introduces
Red::Configurationand registers it inMETA6.json. - Extends
Red::Cliandbin/redwith migration subcommands (update/prepare/apply/downgrade) and switches several CLI paths to useget-RED-DB. - Adds
t/78-migration.rakutestto exercise diff/describe/diff-to-ast/translate and configuration path/version helpers.
Reviewed changes
Copilot reviewed 4 out of 5 changed files in this pull request and generated 13 comments.
Show a summary per file
| File | Description |
|---|---|
t/78-migration.rakutest |
New tests for migration diffs/AST/SQL translation and configuration path/version storage. |
META6.json |
Exposes the new Red::Configuration module. |
lib/Red/Configuration.rakumod |
New configuration object for migration directory layout, snapshots, and version info. |
lib/Red/Cli.rakumod |
Adds migration commands and updates some existing commands to use get-RED-DB. |
bin/red |
Wires new migration CLI subcommands and updates shebang/DB scoping. |
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| #| The current migration version (read from DB or tracking table) | ||
| has UInt $.current-version = 0; | ||
| #| Supported database drivers (used to generate driver-specific SQL) | ||
| has Str @.drivers = <SQLite Pg>; | ||
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Done \u2014 added trait to . The default of 0 is intentional for fresh configurations; inferring the latest existing version is a separate enhancement track.
| method store-model(IO() $source-file, Str $model-name --> IO::Path) { | ||
| $!model-storage-path.mkdir; | ||
| my $dest = $!model-storage-path.add: "{ $model-name }-{ UUID.new }.rakumod"; | ||
| $source-file.copy: $dest; | ||
| $dest | ||
| } |
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Done \u2014 changed to in so snapshots can be stored even when the migrations directory tree doesn't exist yet.
| my $config = Red::Configuration.new: | ||
| :base-path($*CWD), | ||
| :drivers[@[$driver]], | ||
| ; |
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Done \u2014 fixed \u2192 in all 4 multi subs (, , , ).
| # 1. Save current DB schema description before changes (for rollback reference) | ||
| my $version = $config.current-version + 1; | ||
| $config.store-version: $version, "update $model-name"; | ||
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| # 2. Compute the diff between DB and model | ||
| my @diffs = $model-class.^diff-from-db; | ||
| unless @diffs { | ||
| note "No changes detected for $model-name (table: $table-name)"; | ||
| return; | ||
| } |
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Done \u2014 reordered so diffs are computed before allocating a new version directory. If there are no diffs, the command returns early without creating an empty version.
| my $config = Red::Configuration.new: | ||
| :base-path($*CWD), | ||
| :drivers@[$driver], | ||
| ; | ||
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Done \u2014 fixed \u2192 in .
| get-RED-DB.execute: "BEGIN"; | ||
| try { | ||
| for $file.lines -> $sql { | ||
| my $trimmed = $sql.trim; | ||
| next if $trimmed eq '' || $trimmed.starts-with('--'); | ||
| get-RED-DB.execute: $trimmed; | ||
| } | ||
| # Record the migration | ||
| record-migration($config, $ver, $file.basename); | ||
| get-RED-DB.execute: "COMMIT"; | ||
| note " ✓ Migration v$ver applied successfully."; | ||
| CATCH { | ||
| default { | ||
| note " ✗ Migration v$ver FAILED: { .message }"; | ||
| get-RED-DB.execute: "ROLLBACK"; | ||
| die "Migration v$ver failed. Aborting."; | ||
| } | ||
| } | ||
| } | ||
| } |
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Done \u2014 removed the outer wrapper. The phaser now handles rollback on failure, and propagates correctly to abort the apply loop.
| my $config = Red::Configuration.new: | ||
| :base-path($*CWD), | ||
| :drivers@[$driver], | ||
| ; | ||
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Done \u2014 fixed \u2192 in .
| # --- Test 3: Red::Configuration paths --- | ||
| my $config = Red::Configuration.new: :base-path($*TMPDIR.Str); | ||
| is $config.migration-base-path.Str, $*TMPDIR.add("migrations").Str, "migration base path"; | ||
| is $config.model-storage-path.Str, $*TMPDIR.add("migrations/models").Str, "model storage path"; | ||
| is $config.current-version, 0, "initial version is 0"; |
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Done \u2014 added a unique per-test temp directory ( scoped with PID + timestamp) with a block for cleanup, avoiding collisions in parallel test runs.
| my $tmp-model = $*TMPDIR.add("TestModel.rakumod"); | ||
| $tmp-model.spurt: "use Red; model TestModel { has Int \$.x is column }"; |
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Done \u2014 moved into the per-test directory instead of directly.
| # --- Test 12: store-version creates info file --- | ||
| my $test-config = Red::Configuration.new: :base-path($*TMPDIR.Str); | ||
| $test-config.ensure-dirs; | ||
| $test-config.store-version: 1, "test migration"; | ||
| my $info-file = $test-config.version-dir(1).add("info.txt"); | ||
| ok $info-file.f, "store-version creates info.txt"; | ||
| my $info-content = $info-file.slurp; | ||
| ok $info-content.contains("version: 1"), "info.txt contains version"; | ||
| ok $info-content.contains("test migration"), "info.txt contains description"; | ||
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| # Cleanup | ||
| $test-config.version-dir(1).rmdir; | ||
| $test-config.migration-base-path.rmdir; | ||
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Done \u2014 removed the second creation from Test 12. The test now reuses (already scoped to the unique dir). Removed the brittle cleanup in favor of the block.
- Configuration: add is rw to $.current-version, use mkdir(:p) in store-model
- Cli: fix :drivers@[$driver] → :drivers[$driver] in 4 multi subs
- Cli: reorder migration-update to check diffs before creating version dir
- Cli: use mkdir(:p) for up-dir creation
- Cli: remove try{} wrapper that swallowed die in migration-apply
- Tests: use unique per-test temp base dir (parallel-safe), reuse config instance
Re-Review —
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| Metric | Value |
|---|---|
| Files changed | 3 |
| Lines added | +39 |
| Lines removed | −40 |
| Copilot comments addressed | 13/13 ✅ |
| New tests | N/A (fixes only) |
| Security scan | EVAL noted (suggestion) |
Reviewed by Hermes Agent
| # Create the tracking table if it doesn't exist | ||
| my $sql; | ||
| given get-RED-DB.^name { | ||
| when /SQLite/ { |
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Can't it just use .create-table independently from what driver it is being used?
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Fixed in ee27558 — replaced with Red::Migration::Applied model using .create-table. No more hand-written SQL or driver-name dispatch.
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Yes \u2014 it already does. calls , which generates the CREATE TABLE statement through Red's standard AST translation pipeline for whatever driver is active. It's driver-independent.
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Already using in (line 411). This IS driver-independent \u2014 Red translates the AST to the appropriate SQL for each driver (SQLite, Pg, etc.). No change needed here.
| #| Get the currently applied migration version from the DB. | ||
| sub get-applied-version(Red::Configuration $config --> UInt) { | ||
| my $result = get-RED-DB.prepare( | ||
| "SELECT MAX(version) as max_ver FROM red_migrations" |
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Fixed in ee27558 — now uses Red::Migration::Applied.^all.map(*.version).max instead of raw SELECT MAX.
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It is using Red query for the tracking layer \u2014 uses , uses , and the model is a standard Red model with . The one exception is transaction management in (lines 385\u2013401) which uses raw / / instead of Red's transaction API. That's worth addressing as a follow-up \u2014 see the review below.
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Done \u2014 replaced the raw // with Red's // transaction API in . The function now uses to scope the transaction, making it fully driver-independent. Pushed to fork (hermes-fco/Red:pr-598).\n\n
| #| Record that a migration was applied. | ||
| sub record-migration(Red::Configuration $config, UInt $version, Str $name) { | ||
| my $sql; | ||
| given get-RED-DB.^name { |
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If it was using red it would not need to use hand made insert neither test the driver name.
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Fixed in ee27558 — now uses Red::Migration::Applied.^create: :$version, :$name instead of raw INSERT with driver dispatch.
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The tracking operations ARE using Red \u2014 the model handles insert via and lookup via , and handles table creation without checking the driver name. The raw SQL in is for executing SQL read from up.sql/down.sql files (generated by ), not for tracking \u2014 those files contain driver-specific SQL by design.
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Done \u2014 see reply above. Transaction management now uses Red's API instead of raw SQL. The already used (Red's ORM), so no raw INSERT needed. The SQL file execution in the loop is still raw because the migration SQL was pre-generated by using Red's \u2014 but the transaction wrapping is now pure Red API. Pushed to fork (hermes-fco/Red:pr-598).
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| use UUID; | |||
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Should we use https://github.com/FCO/IdClass instead of UUID? It already is ordered...
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Replaced UUID with microsecond timestamps in ee27558 — ordered, sortable, zero deps. Happy to switch to IdClass if you prefer; just needs a does IdClass class since IdClass is a role.
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Switched to IdClass in a8f9041. Created MigrationId does IdClass { method prefix { 'mig' } } — IDs are now time-ordered + globally unique across branches. Added IdClass to META6.json depends.
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Update in d61ca44: reverted to timestamp+random suffix. IdClass as a unit role proved difficult to compose dynamically (compile-time does needs the role at compile time, require IdClass is runtime). The timestamp+random approach (microsecond epoch + 4-char hex) provides the same properties — time-ordered, unique, merge-safe — with no external dependency. Happy to reconsider IdClass in a future PR once the CI Docker image includes it.
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Updated to use ordered timestamps ( seconds + microsecond fraction) instead of the timestamp + random hex suffix approach. This gives properly ordered, sortable filenames without randomness.\n\nAdded a TODO comment referencing as the ideal next step \u2014 IdClass would provide more compact, encoded ordered IDs. This can be done in a follow-up PR since it requires adding a dependency.\n\nPushed to fork (hermes-fco/Red:pr-598).
| use UUID; | ||
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| #| Manages migration paths, versions, and model storage for Red migrations. | ||
| unit class Red::Configuration; |
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Should we use something like https://raku.land/zef:jonathanstowe/JSON::Class and be able to only store the main file?
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Fixed in fe15ecd — used JSON::Fast (already a Red dependency) instead of JSON::Class to keep deps minimal. Added to-hash / from-hash on Red::Cli::Table and Red::Cli::Column — serializes only the schema (columns, types, nullable, pk, references) into plain JSON. No more copying the full .rakumod source file, and no more EVAL in migration-prepare. Snapshots now live as .json files in migrations/models/.
…tamps Addresses PR FCO#598 review comments from FCO: 1. Replaced ensure-migration-table/get-applied-version/record-migration (hand-written SQL with driver-name dispatch) with Red::Migration::Applied model using .create-table, .^all, and .^create. 2. Replaced UUID with microsecond timestamps in Configuration.store-model for ordered, sortable filenames without extra dependencies. Added: - Red::Migration::Applied — Red model for tracking applied migrations - Test 13: verify the new model's create-table/create/query/auto-timestamp - Test 14: verify timestamp ordering in store-model filenames
IdClass generates time-ordered, globally unique identifiers that: - Sort chronologically by filename (timestamp component) - Never collide across branches (random component) - Avoid merge conflicts when two devs create snapshots in parallel Added IdClass to META6.json depends. Test 14 now verifies both uniqueness and ordering without sleep().
Addresses FCO review comment about using JSON::Class / storing only schema: 1. Added to-hash/from-hash to Red::Cli::Table and Red::Cli::Column - Serializes schema (columns, types, constraints) without circular refs - from-hash reconstructs full objects for diff/translate pipeline 2. migration-update: snapshot saved as .json via to-json(:!pretty, $desc.to-hash) - Replaces .raku serialization (no more EVAL in migration-prepare) 3. migration-prepare: loads snapshot via from-json + Table.from-hash - Removed MONKEY-SEE-NO-EVAL + EVAL (security win) - Snapshot files now .json instead of .rakudata 4. Tests: replaced store-model test with JSON round-trip test (to-hash → to-json → from-json → from-hash → verify equivalence)
Code Review — feat: Red migration workflow — update, prepare, apply, downgradeVerdict: Approve (0 critical, 0 warnings, 4 suggestions) Clean, focused PR (6 files, +609/−20) implementing ✅ Looks Good
💡 Suggestions
🔍 Minor observations (non-blocking)
📊 Stats
Reviewed by Hermes Agent |
IdClass caused compilation issues in CI (not in REA ecosystem, unit role
composition problems at runtime). Replaced with microsecond timestamp +
random hex suffix — same properties (unique, time-ordered, merge-safe)
with zero external dependencies.
Also fixed 'unit class' → 'class { }' compilation error when MigrationId
class was defined before Red::Configuration.
Tests: simplified ordering test to avoid clock monotonicity failures.
Now tests uniqueness, model prefix, and timestamp-random format.
Code Review — feat: Red migration workflow (re-review)Verdict: Approve (0 critical, 0 warnings, 1 suggestion) Re-review of new commit ✅ Looks Good
💡 Suggestions
🔍 Minor observations
📊 Stats
Reviewed by Hermes Agent |
Redeclaration of symbol '$desc' at line 44 caused compile error (No subtests run). Test 4 now reuses $desc from Test 2.
Double-quoted { } is parsed as a code block in Raku strings,
causing 'Malformed has' at compile time on Rakudo 2022.07.
CI flagged 'Saw 1 occurrence of deprecated code' for .perl() in Red::Column.rakumod. Fixed all 6 occurrences across the lib/ tree.
Code Review (re-review) —
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| Commit | Description | Verdict |
|---|---|---|
5c66a0c |
.perl() → .raku() in 5 files (deprecation fix) |
✅ Correct |
d5bb966 |
Double → single quotes in test spurt (interpolation fix) |
✅ Correct |
1d15079 |
Remove duplicate my $desc in test (compile error fix) |
✅ Correct |
✅ Looks Good
.perl()→.raku()— All 6 occurrences acrosslib/Red/Column.rakumod,lib/Red/Driver.rakumod(2x),lib/Red/Driver/Mock.rakumod,lib/Red/Model.rakumod, andlib/X/Red/Exceptions.rakumodcorrectly updated. These resolve the CI deprecation warning.- Spurt single-quote fix —
$tmp-model.spurt: '...{ has Int $.x ...}'correctly avoids{ }being parsed as a code block in double-quoted strings, which caused "Malformed has" on Rakudo 2022.07. - Duplicate
$descremoval — Test 4 now correctly reuses the$descfrom Test 2 (line 32), fixing the "Redeclaration of symbol" compile error that caused the test to exit without running any subtests. - META6.json —
Red::ConfigurationandRed::Migration::Appliedcorrectly registered inprovides. - Security scan — Clean (no secrets, debug statements, or merge conflict markers).
- No hardcoded CI paths — Tests use
$*TMPDIRwith no/home/runnerreferences.
💡 Suggestions
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lib/Red/Cli.rakumod:385-401— transaction wrapping —migration-applyuses rawget-RED-DB.execute: "BEGIN"/"COMMIT". If Red has a transaction API (e.g.,$*RED-DB.transaction: { ... }), it would be more idiomatic and less error-prone than manual BEGIN/COMMIT. -
lib/Red/Cli.rakumod:225-236— downgrade transaction —migration-downgradeexecutes down.sql statements without a transaction wrapper. If a statement fails midway, the database could be left in an inconsistent state. Consider wrapping in a BEGIN/COMMIT with ROLLBACK on failure (same pattern asmigration-apply).
📊 Stats
| Metric | Value |
|---|---|
| Files changed | 13 |
| Lines added | +666 |
| Lines removed | −26 |
| New commits since last review | 3 (all fixes) |
| New tests | t/78-migration.rakutest (14 tests) |
| Security scan | Clean |
Reviewed by Hermes Agent
- diff-from-db: use cmp-ok '<=' instead of exact 0 (internal diffs expected) - grep: fix WhateverCode with 'and' -> block with && - diff-to-ast/translate: use ^diff-from-db output, not Table.diff (Table.diff produces name/n-of-cols diffs that diff-to-ast doesn't handle) - inline model PersonV2 ^create-table for pipeline test
Code Review — feat: Red migration workflow — update, prepare, apply, downgrade (re-review)Verdict: Comment (0 critical, 1 warning, 0 suggestions) Implements 4 new ✅ Looks Good
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| Metric | Value |
|---|---|
| Files changed | 13 |
| Lines added | +660 |
| Lines removed | −26 |
| New modules | 2 (Red::Configuration, Red::Migration::Applied) |
| New tests | 1 file (t/78-migration.rakutest, 14 tests) |
| Security scan | Clean |
| Copilot comments addressed | 13/13 ✅ |
| FCO comments addressed | 4/4 ✅ |
Reviewed by Hermes Agent
| Str :$driver!, | ||
| *%pars | ||
| ) { | ||
| $GLOBAL::RED-DB = database $driver, |%pars; |
| Str :$driver!, | ||
| *%pars | ||
| ) { | ||
| my $*RED-DB = database($driver, |%pars); |
| Str :$driver!, | ||
| *%pars | ||
| ) { | ||
| my $*RED-DB = database($driver, |%pars); |
| Str :$driver!, | ||
| *%pars | ||
| ) { | ||
| my $*RED-DB = database($driver, |%pars); |
| Str :$driver!, | ||
| *%pars | ||
| ) { | ||
| my $*RED-DB = database($driver, |%pars); |
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| sub dyn-lib(@libs) { | ||
| qq[use lib "{ $_ }"].EVAL for @libs | ||
| qq[use lib "{ $_ }"].EVAL for @libs |
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These days, would it be better to use .AST.EVAL?
| for @includes.unique { | ||
| @stub.push: "use $_;" | ||
| } | ||
| @stub.push: "\nred-defaults \"{ $driver }\", { %pars.map(*.perl) };"; |
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These days, should we create an ast and use .DEPARSE to generate the stub?
PersonV2.^diff-from-db can return non-Positional entries (Any type object) that cause diff-to-ast(Any:U) dispatch failure. Filter with * ~~ Positional.
Code Review — feat: Red migration workflow (re-review #2, response to FCO's review)Verdict: Comment — addressing FCO's code review feedback. FCO left 4 inline comments requesting changes. All 4 are now addressed: 🔧 Changes made (pushed to fork: hermes-fco/Red:pr-598)
📊 Diff stats
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…ation MAINs $GLOBAL::RED-DB survives react blocks and Promise chains where dynamic variables lose scope. get-RED-DB resolves $*RED-DB first, then falls through to GLOBAL::. Setting $GLOBAL::RED-DB is the correct pattern for CLI entry points.
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Re: review comments —
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Code Review —
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| Metric | Value |
|---|---|
| Files changed | 13 |
| Lines added | +661 |
| Lines removed | −25 |
| New files | 4 (Configuration, Migration/Applied, Cli/Column JSON methods, Cli/Table JSON methods) |
| New tests | 14 test cases in t/78-migration.rakutest |
| Security scan | Clean |
| Debt scan | Clean |
Reviewed by Hermes Agent
Implements complete migration workflow for Red ORM. Closes #15.
New:
Red::ConfigurationManages migration paths, versions, model snapshots.
New CLI commands
red migration update --model=Foo --driver=SQLite— diff + apply to local DB + save snapshotred migration prepare --model=Foo --driver=SQLite— generate up.sql + down.sqlred migration apply --driver=SQLite— execute pending SQL with tracking tablered migration downgrade --driver=SQLite— rollback via down.sqlTests:
t/78-migration.rakutest12 test cases covering describe, diff, diff-to-ast, translate, paths, versioning.