sequelize/sequelize

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Feature-rich ORM for modern Node.js and TypeScript, it supports PostgreSQL (with JSON and JSONB support), MySQL, MariaDB, SQLite, MS SQL Server, Snowflake, Oracle DB, DB2 and DB2 for IBM i.

Stars: 30.4k
Forks: 4.3k
Open beginner issues: 2
Indexed issues: 928
Avg merge: 1d 6h
Merged PRs (30d): 68

Dominant language: TypeScript
License: MIT
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

928 open issues indexed

Sequelize#sync({ force: true, schema }) drops tables in the default schema Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 68/100

sequelize/sequelize#18423 · Opened Sep 18, 2026
[PostgreSQL] Sync fails when multiple schemas contain a table with the same name Open

dialect: postgres regression

Difficulty 3/5 1-2 days Newbie friendliness 68/100

sequelize/sequelize#18379 · Opened Sep 13, 2026
PostgreSQL column queries parse generated SQL instead of using the attribute object Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 30/100

sequelize/sequelize#18362 · Opened Sep 11, 2026
Support `parameterStyle: BIND` in the mssql and db2 `bulkInsertQuery` overrides Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 52/100

sequelize/sequelize#18346 · Opened Sep 7, 2026
Model-reload reverts to old-state when saving inside immediate-transaction with SQLite in WAL-mode Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 42/100

sequelize/sequelize#18344 · 2 comments · Opened Sep 7, 2026
Drop Node 20 support and remove the node-gyp pin it requires Open

type: refactor

sequelize/sequelize#18327 · 1 comment · 1 assignee · Opened Sep 3, 2026
Scope and paranoid conditions are merged into `options.where`, so nothing downstream can tell them from the caller's own filter Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 25/100

sequelize/sequelize#18323 · Opened Aug 31, 2026
The automated release is failing 🚨 Open

semantic-release

sequelize/sequelize#18321 · 1 comment · 1 assignee · Opened Aug 29, 2026
Normalize generated-column expressions during sync({ alter: true }) drift detection Open

pending-approval

sequelize/sequelize#18320 · 1 assignee · Opened Aug 29, 2026
Latest stable Sequelize installs deprecated dottie@2.0.7 and uuid@8.3.2 Open

v6

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sequelize/sequelize#18317 · 3 comments · Opened Aug 27, 2026
v6 CI: postgres-native legs on Node 10 fail because pg-native is installed unpinned Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

sequelize/sequelize#18312 · Opened Aug 20, 2026
Op.in: [] emits IN (NULL) (SQL UNKNOWN, not FALSE), so Op.not around it returns zero rows instead of all rows Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

sequelize/sequelize#18306 · 2 comments · Opened Aug 17, 2026
db2: createTable and sync never apply column comments Open

dialect: db2 pending-approval type: bug

sequelize/sequelize#18289 · 1 assignee · Opened Jul 29, 2026
Audit the v7 Oracle dialect port (#18050) for validations dropped from v6 Open

dialect: oracle pending-approval security type: bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

sequelize/sequelize#18283 · Opened Jul 29, 2026
Unsupported connection charset silently desyncs client/server escaping in @sequelize/mariadb, enabling SQL injection Open

dialect: mariadb pending-approval security type: bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sequelize/sequelize#18282 · 1 comment · Opened Jul 29, 2026
bulkCreate with updateOnDuplicate/ignoreDuplicates assigns wrong primary keys to returned instances on MySQL/MariaDB Open

dialect: mariadb dialect: mysql pending-approval type: bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sequelize/sequelize#18281 · Opened Jul 29, 2026
Ratify (or revise) the security disposition and severity methodology from THREAT_MODEL.md Open

meta pending-approval security

Difficulty 5/5 Over a week Newbie friendliness 25/100

sequelize/sequelize#18280 · Opened Jul 29, 2026
Add official Firebird dialect support Open

dialect: new hard type: feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

sequelize/sequelize#18269 · 2 comments · Opened Jul 20, 2026
Pool connection leak when `SET time_zone` fails in connect() Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 65/100

sequelize/sequelize#18266 · Opened Jul 17, 2026
SQLite: sequelize.sync({ alter: true }) recreates INTEGER PRIMARY KEY without AUTOINCREMENT Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 65/100

sequelize/sequelize#18265 · Opened Jul 17, 2026
mssql dialect always sends string params/literals as NVARCHAR, causing implicit-conversion index scans on VARCHAR columns Open

dialect: mssql good first issue performance RFC status: in discussion

Difficulty 5/5 Over a week Newbie friendliness 42/100

sequelize/sequelize#18260 · 3 comments · Opened Jul 14, 2026
`belongsToMany` subquery omits a custom `sourceKey` Open

existing workaround hard performance regression

Difficulty 3/5 1-2 days Newbie friendliness 68/100

sequelize/sequelize#18256 · Opened Jul 13, 2026
Add native UUIDv7 support (v7 branch) Open

good first issue P4: nice to have

Difficulty 4/5 3-5 days Newbie friendliness 52/100

sequelize/sequelize#18253 · 4 comments · Opened Jul 13, 2026
Custom setters not called on field values in where clause Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 52/100

sequelize/sequelize#18252 · 1 reaction · Opened Jul 10, 2026
Named replacements not substituted when followed by division operator (/) Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

sequelize/sequelize#18242 · Opened Jun 17, 2026
sequelize depends on vulnerable uuid version Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

sequelize/sequelize#18238 · 2 comments · 36 reactions · Opened Jun 14, 2026
isModelStatic re-runs require('../model') on every call (redundant module resolution on a hot path) Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

sequelize/sequelize#18233 · Opened Jun 5, 2026
Race in replication pool: connection.on('error') fires before queryType is assigned, crashing the process Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#18232 · Opened Jun 3, 2026
Performance impact of refreshOidMap query in high-schema environments Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 25/100

sequelize/sequelize#18229 · Opened May 29, 2026
Sequelize v6 incompatible with uuid >= 9 due to CommonJS require() usage Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sequelize/sequelize#18224 · 2 comments · 1 reaction · Opened May 12, 2026
ModelStatic<M> looses custom static methods Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 55/100

sequelize/sequelize#18206 · 2 comments · Opened Apr 8, 2026
Unexpected on delete cascade for 1:n relationships with nullable foreignKey Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 52/100

sequelize/sequelize#18172 · Opened Mar 24, 2026
isJSON validation Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 38/100

sequelize/sequelize#18141 · Opened Mar 6, 2026
Feature Request: Native UNION Query Support Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 35/100

sequelize/sequelize#18107 · 1 reaction · Opened Jan 24, 2026
Thoughts on removing/replacing lodash as a dependency Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sequelize/sequelize#18089 · 1 comment · 2 reactions · Opened Jan 4, 2026
Add dialect support for DuckDB Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 20/100

sequelize/sequelize#18079 · Opened Dec 14, 2025
Sequelize CLI to Squash migrations into a single migration file Open

P4: nice to have type: feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

sequelize/sequelize#18069 · 7 comments · Opened Nov 24, 2025
[Reopen] Mismatch date value sql injection checking due to timezone problem in moment.js and moment-timezone.js when using oracle dialect for DataTypes.DATE Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 42/100

sequelize/sequelize#18062 · 3 comments · 1 reaction · Opened Nov 20, 2025
When `include` is used for association query, after json escape is performed on the returned object, attributes declared in `DataTypes.VIRTUAL` cannot be obtained by default. Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#18059 · 1 reaction · Opened Nov 19, 2025
Paranoid Friendly @ModelValidator Decorator Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#18035 · 2 comments · Opened Oct 21, 2025
Invalid value received for the "where" option in REPL Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 42/100

sequelize/sequelize#18033 · 1 comment · Opened Oct 20, 2025
[how solve] Sequalize + Sqlite + Bun compile single Executable Open

pending-approval

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

sequelize/sequelize#17994 · 1 comment · 6 reactions · Opened Oct 7, 2025
Sequelize keeps creating duplicate unique constraints on the same column Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#17978 · 2 comments · Opened Sep 19, 2025
[MySQL] schema option does not allow cross-database table access Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sequelize/sequelize#17975 · 3 comments · 5 reactions · Opened Sep 12, 2025
Make "include" queries more intuitive Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#17974 · 1 comment · Opened Sep 7, 2025
Add GaussDB/OpenGauss Dialect Support to Sequelize Open

pending-approval

Difficulty 5/5 Over a week Newbie friendliness 20/100

sequelize/sequelize#17966 · Opened Aug 4, 2025
sequelize.sync({ alter: true }) creates a new foreign key constraint even though nothing changed Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sequelize/sequelize#17962 · 1 reaction · Opened Aug 1, 2025
Sequlize establishing connection unstable throwing ECONNRESET when running in Kubernetes Pod container Open

pending-approval

Difficulty 4/5 3-5 days Newbie friendliness 25/100

sequelize/sequelize#17955 · 1 comment · Opened Jul 27, 2025
`has()` method in belongsToMany model works incorrectly in MySQL when targetKey is BIGINT Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 45/100

sequelize/sequelize#17947 · 1 comment · Opened Jul 26, 2025
[BUG] Sequelize v6 Migration unique Constraint Object Ignored Open

pending-approval

Difficulty 3/5 1-2 days Newbie friendliness 42/100

sequelize/sequelize#17940 · 1 reaction · Opened Jul 20, 2025

sequelize/sequelize

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