Latest fixes and solutions for database errors on FixDevs.https://fixdevs.com/enMon, 06 Apr 2026 00:00:00 GMThttps://fixdevs.com/blog/sqlalchemy-not-working/https://fixdevs.com/blog/sqlalchemy-not-working/How to fix SQLAlchemy 2.x errors — DetachedInstanceError from lazy loading, QueuePool limit exceeded, MissingGreenlet in async context, N+1 queries, IntegrityError rollback, and Alembic migration failures.Mon, 06 Apr 2026 00:00:00 GMTpythonsqlalchemydatabaseormdebuggingFixDevshttps://fixdevs.com/blog/astro-db-not-working/https://fixdevs.com/blog/astro-db-not-working/How to fix Astro DB issues — schema definition, seed data, queries with drizzle, local development, remote database sync, and Astro Studio integration.Mon, 30 Mar 2026 00:00:00 GMTastrodatabasetypescriptdebuggingFixDevshttps://fixdevs.com/blog/electric-sql-not-working/https://fixdevs.com/blog/electric-sql-not-working/How to fix ElectricSQL issues — Postgres setup with logical replication, shape definitions, real-time sync to the client, React hooks, write-path through the server, and deployment configuration.Sun, 29 Mar 2026 00:00:00 GMTdatabasetypescriptreactdebuggingFixDevshttps://fixdevs.com/blog/powersync-not-working/https://fixdevs.com/blog/powersync-not-working/How to fix PowerSync issues — SQLite local database, sync rules configuration, backend connector setup, watched queries, offline-first patterns, and React and React Native integration.Sun, 29 Mar 2026 00:00:00 GMTdatabasetypescriptreactmobiledebuggingFixDevshttps://fixdevs.com/blog/neon-database-not-working/https://fixdevs.com/blog/neon-database-not-working/How to fix Neon Postgres issues — connection string setup, serverless HTTP driver vs TCP, database branching, connection pooling, Drizzle and Prisma integration, and cold start optimization.Sat, 28 Mar 2026 00:00:00 GMTdatabasetypescriptbackenddebuggingFixDevshttps://fixdevs.com/blog/turso-not-working/https://fixdevs.com/blog/turso-not-working/How to fix Turso database issues — libsql client setup, connection URLs and auth tokens, embedded replicas for local-first apps, schema migrations, Drizzle ORM integration, and edge deployment.Sat, 28 Mar 2026 00:00:00 GMTdatabasetypescriptbackenddebuggingFixDevshttps://fixdevs.com/blog/upstash-not-working/https://fixdevs.com/blog/upstash-not-working/How to fix Upstash issues — Redis REST client setup, rate limiting with @upstash/ratelimit, QStash message queues, Kafka topics, Vector search, and edge runtime integration.Sat, 28 Mar 2026 00:00:00 GMTdatabasetypescriptbackenddebuggingFixDevshttps://fixdevs.com/blog/convex-not-working/https://fixdevs.com/blog/convex-not-working/How to fix Convex backend issues — query/mutation/action patterns, schema validation, real-time reactivity, file storage, auth integration, and common TypeScript type errors.Fri, 27 Mar 2026 00:00:00 GMTjavascripttypescriptbackenddatabasedebuggingFixDevshttps://fixdevs.com/blog/kysely-not-working/https://fixdevs.com/blog/kysely-not-working/How to fix Kysely query builder issues — database interface definition, dialect setup, type-safe joins and subqueries, migration runner, kysely-codegen for generated types, and common TypeScript errors.Fri, 27 Mar 2026 00:00:00 GMTtypescriptbackenddatabasedebuggingFixDevshttps://fixdevs.com/blog/supabase-not-working/https://fixdevs.com/blog/supabase-not-working/How to fix Supabase issues — Row Level Security policies, realtime subscriptions, storage permissions, auth session with Next.js, edge functions, and common client configuration mistakes.Fri, 27 Mar 2026 00:00:00 GMTjavascripttypescriptbackenddatabasedebuggingFixDevshttps://fixdevs.com/blog/drizzle-orm-not-working/https://fixdevs.com/blog/drizzle-orm-not-working/How to fix Drizzle ORM issues — schema definition, drizzle-kit push vs migrate, relation queries with, transactions, type inference, and common PostgreSQL/MySQL configuration problems.Thu, 26 Mar 2026 00:00:00 GMTtypescriptnodejsdatabasebackenddebuggingFixDevshttps://fixdevs.com/blog/mysql-replication-not-working/https://fixdevs.com/blog/mysql-replication-not-working/How to fix MySQL replication issues — SHOW REPLICA STATUS errors, relay log corruption, GTID configuration, replication lag, skipping errors, and replica promotion.Thu, 26 Mar 2026 00:00:00 GMTmysqldatabasedevopsdebuggingbackendFixDevshttps://fixdevs.com/blog/postgres-jsonb-query-not-working/https://fixdevs.com/blog/postgres-jsonb-query-not-working/How to fix PostgreSQL JSONB query issues — -> vs ->> operators, @> containment, GIN indexes, type casting, array queries, and indexing strategies for JSONB columns.Thu, 26 Mar 2026 00:00:00 GMTpostgresqldatabasebackenddebuggingFixDevshttps://fixdevs.com/blog/postgres-row-level-security-not-working/https://fixdevs.com/blog/postgres-row-level-security-not-working/How to fix PostgreSQL Row Level Security (RLS) issues — enabling RLS, policy expressions, BYPASSRLS role, SET ROLE, current_user vs session_user, and Supabase auth.uid() patterns.Thu, 26 Mar 2026 00:00:00 GMTpostgresqldatabasebackendsecuritydebuggingFixDevshttps://fixdevs.com/blog/redis-cluster-not-working/https://fixdevs.com/blog/redis-cluster-not-working/How to fix Redis Cluster errors — MOVED redirects, CROSSSLOT multi-key operations, cluster-aware client setup, hash tags for key grouping, and failover handling.Thu, 26 Mar 2026 00:00:00 GMTredisbackenddatabasedebuggingdevopsFixDevshttps://fixdevs.com/blog/mongodb-aggregation-not-working/https://fixdevs.com/blog/mongodb-aggregation-not-working/How to fix MongoDB aggregation pipeline issues — $lookup field matching, $unwind on missing fields, $match placement, $group _id, type mismatches, and pipeline debugging.Wed, 25 Mar 2026 00:00:00 GMTmongodbdatabasebackenddebuggingFixDevshttps://fixdevs.com/blog/prisma-enum-not-working/https://fixdevs.com/blog/prisma-enum-not-working/How to fix Prisma enum errors — schema definition, database sync, TypeScript enum type mismatch, filtering by enum, and migrating existing enum values.Wed, 25 Mar 2026 00:00:00 GMTprismanodejstypescriptdatabasedebuggingFixDevshttps://fixdevs.com/blog/spring-data-jpa-query-not-working/https://fixdevs.com/blog/spring-data-jpa-query-not-working/How to fix Spring Data JPA query issues — JPQL vs native SQL, derived method naming, @Modifying for updates, pagination, projections, and LazyInitializationException.Wed, 25 Mar 2026 00:00:00 GMTspring-bootjavadatabasebackenddebuggingFixDevshttps://fixdevs.com/blog/mongodb-schema-validation-error/https://fixdevs.com/blog/mongodb-schema-validation-error/How to fix MongoDB schema validation errors — $jsonSchema rules, required fields, type mismatches, enum constraints, bypassing validation for migrations, and Mongoose schema conflicts.Sun, 22 Mar 2026 00:00:00 GMTmongodbdatabasenodejsbackenddebuggingFixDevshttps://fixdevs.com/blog/mysql-full-text-search-not-working/https://fixdevs.com/blog/mysql-full-text-search-not-working/How to fix MySQL full-text search issues — FULLTEXT index creation, minimum word length, stopwords, boolean mode vs natural language mode, InnoDB vs MyISAM, and LIKE fallback.Sun, 22 Mar 2026 00:00:00 GMTmysqldatabasesqlbackenddebuggingFixDevshttps://fixdevs.com/blog/postgres-index-not-used/https://fixdevs.com/blog/postgres-index-not-used/How to fix PostgreSQL indexes not being used — EXPLAIN ANALYZE output, function on indexed column, type mismatches, statistics staleness, partial indexes, and query planner costs.Sun, 22 Mar 2026 00:00:00 GMTpostgresqldatabasesqlperformancedebuggingFixDevshttps://fixdevs.com/blog/prisma-connection-pool-exhausted/https://fixdevs.com/blog/prisma-connection-pool-exhausted/How to fix Prisma connection pool errors — pool size configuration, connection leaks, serverless deployments, singleton pattern, query timeout, and pgBouncer integration.Sun, 22 Mar 2026 00:00:00 GMTprismadatabasenodejsbackenddebuggingFixDevshttps://fixdevs.com/blog/rails-n-plus-one-query/https://fixdevs.com/blog/rails-n-plus-one-query/How to fix Rails N+1 queries — includes vs joins vs preload vs eager_load, Bullet gem detection, avoiding N+1 in serializers and views, and counter caches.Sun, 22 Mar 2026 00:00:00 GMTrailsrubydatabasebackendperformancedebuggingFixDevshttps://fixdevs.com/blog/spring-boot-transaction-not-rolling-back/https://fixdevs.com/blog/spring-boot-transaction-not-rolling-back/How to fix Spring @Transactional not rolling back — checked vs unchecked exceptions, self-invocation proxy bypass, rollbackFor, transaction propagation, and nested transactions.Sun, 22 Mar 2026 00:00:00 GMTspring-bootjavabackenddatabasedebuggingFixDevshttps://fixdevs.com/blog/mysql-index-not-used/https://fixdevs.com/blog/mysql-index-not-used/How to fix MySQL indexes not being used by the query optimizer — EXPLAIN output, implicit conversions, function on columns, composite index order, cardinality issues, and forcing indexes.Sat, 21 Mar 2026 00:00:00 GMTmysqldatabasebackendperformancedebuggingFixDevshttps://fixdevs.com/blog/prisma-transaction-error/https://fixdevs.com/blog/prisma-transaction-error/How to fix Prisma transaction errors — interactive transactions vs $transaction array, error handling and rollback, nested transactions, timeout issues, and isolation levels.Sat, 21 Mar 2026 00:00:00 GMTprismanodejstypescriptbackenddatabasedebuggingFixDevshttps://fixdevs.com/blog/mysql-slow-query-optimization/https://fixdevs.com/blog/mysql-slow-query-optimization/How to diagnose and fix slow MySQL queries — enabling the slow query log, reading EXPLAIN output, adding indexes, fixing N+1 queries, and optimizing JOINs and ORDER BY.Fri, 20 Mar 2026 00:00:00 GMTmysqldatabaseperformancebackenddebuggingFixDevshttps://fixdevs.com/blog/postgres-slow-query/https://fixdevs.com/blog/postgres-slow-query/How to diagnose and fix slow PostgreSQL queries — reading EXPLAIN ANALYZE output, adding the right indexes, fixing N+1 queries, optimizing joins, and using pg_stat_statements.Fri, 20 Mar 2026 00:00:00 GMTpostgresqldatabaseperformancebackenddebuggingFixDevshttps://fixdevs.com/blog/typeorm-query-failed/https://fixdevs.com/blog/typeorm-query-failed/How to fix TypeORM QueryFailedError, entity not found errors, relation issues, missing migrations, and connection configuration problems in Node.js and NestJS applications.Fri, 20 Mar 2026 00:00:00 GMTtypescriptnodejsdatabasedebuggingbackendFixDevshttps://fixdevs.com/blog/postgres-max-connections-exceeded/https://fixdevs.com/blog/postgres-max-connections-exceeded/How to fix PostgreSQL 'sorry, too many clients already' error — checking active connections, using connection pooling with PgBouncer, tuning max_connections, fixing ORM pool settings, and finding connection leaks.Thu, 19 Mar 2026 00:00:00 GMTpostgresqldatabasedevopsbackenddebuggingFixDevshttps://fixdevs.com/blog/prisma-unique-constraint-failed/https://fixdevs.com/blog/prisma-unique-constraint-failed/How to fix Prisma's 'Unique constraint failed on the fields' error — finding which field caused it, handling upserts, race conditions, and bulk insert deduplication.Thu, 19 Mar 2026 00:00:00 GMTprismanodejsdatabasetypescriptdebuggingFixDevshttps://fixdevs.com/blog/spring-boot-failed-to-configure-datasource/https://fixdevs.com/blog/spring-boot-failed-to-configure-datasource/How to fix 'Failed to configure a DataSource: url attribute is not specified' in Spring Boot — adding database properties, excluding DataSource auto-configuration, H2 vs production DB setup, and multi-datasource configuration.Thu, 19 Mar 2026 00:00:00 GMTspring-bootjavadatabasedebuggingbackendFixDevshttps://fixdevs.com/blog/mongodb-replica-set-not-primary/https://fixdevs.com/blog/mongodb-replica-set-not-primary/How to fix MongoDB 'not primary' errors when writing to a replica set — read preference misconfiguration, connecting to a secondary, replica set elections, and write concern settings.Wed, 18 Mar 2026 00:00:00 GMTmongodbdatabasedebuggingbackendFixDevshttps://fixdevs.com/blog/django-migration-conflict/https://fixdevs.com/blog/django-migration-conflict/How to fix Django migration conflicts — why multiple leaf migrations conflict, how to merge conflicting migrations, resolve dependency chains, and set up a team workflow to prevent migration conflicts.Tue, 17 Mar 2026 00:00:00 GMTdjangopythondatabasedebuggingFixDevshttps://fixdevs.com/blog/spring-boot-datasource-failed/https://fixdevs.com/blog/spring-boot-datasource-failed/How to fix Spring Boot 'Failed to configure a DataSource' errors — missing URL property, driver class not found, connection refused, and how to correctly configure datasource properties for MySQL, PostgreSQL, and H2.Tue, 17 Mar 2026 00:00:00 GMTspring-bootjavadatabasedebuggingFixDevshttps://fixdevs.com/blog/aws-rds-connection-timed-out/https://fixdevs.com/blog/aws-rds-connection-timed-out/How to fix AWS RDS connection timeout errors from Lambda functions and EC2 instances — security group configuration, VPC settings, connection pooling, and RDS Proxy setup for Lambda.Mon, 16 Mar 2026 00:00:00 GMTawsrdslambdaec2databasedebuggingFixDevshttps://fixdevs.com/blog/prisma-migration-failed/https://fixdevs.com/blog/prisma-migration-failed/How to fix Prisma migration errors — migrate dev failing with schema drift, migrate deploy errors in production, database out of sync, and how to safely reset or resolve migration conflicts.Mon, 16 Mar 2026 00:00:00 GMTprismadatabasenodejsdebuggingFixDevshttps://fixdevs.com/blog/redis-key-not-expiring/https://fixdevs.com/blog/redis-key-not-expiring/How to fix Redis keys that never expire — why EXPIRE commands are silently overwritten, how SET options replace TTL, how to inspect key TTL, and how to prevent accidental TTL removal in your application.Mon, 16 Mar 2026 00:00:00 GMTredisdatabasecachingdebuggingFixDevshttps://fixdevs.com/blog/elasticsearch-index-not-found/https://fixdevs.com/blog/elasticsearch-index-not-found/How to fix Elasticsearch index_not_found_exception errors — why index operations fail with 404, how to create indices correctly, manage index aliases, and handle missing indices in production.Sun, 15 Mar 2026 00:00:00 GMTelasticsearchdatabasedebuggingdevopsFixDevshttps://fixdevs.com/blog/mysql-deadlock-detected/https://fixdevs.com/blog/mysql-deadlock-detected/How to fix MySQL 'Deadlock found when trying to get lock; try restarting transaction' — diagnosing deadlock causes, using SHOW ENGINE INNODB STATUS, and preventing deadlocks with consistent lock ordering.Sun, 15 Mar 2026 00:00:00 GMTmysqldatabasedebuggingsqlFixDevshttps://fixdevs.com/blog/elasticsearch-cluster-red-status/https://fixdevs.com/blog/elasticsearch-cluster-red-status/Fix Elasticsearch cluster health red status by resolving unassigned shards, disk watermark issues, node failures, and shard allocation problems.Wed, 11 Mar 2026 00:00:00 GMTelasticsearchdatabasedebuggingFixDevshttps://fixdevs.com/blog/mongodb-duplicate-key-error/https://fixdevs.com/blog/mongodb-duplicate-key-error/How to fix the MongoDB E11000 duplicate key error by identifying duplicate fields, fixing index conflicts, using upserts, handling null values, and resolving race conditions.Tue, 10 Mar 2026 00:00:00 GMTmongodbdatabasedebuggingFixDevshttps://fixdevs.com/blog/sqlite-database-is-locked/https://fixdevs.com/blog/sqlite-database-is-locked/How to fix the SQLite 'database is locked' error caused by concurrent writes, long-running transactions, missing WAL mode, busy timeout, and unclosed connections.Tue, 10 Mar 2026 00:00:00 GMTsqlitedatabasedebuggingFixDevshttps://fixdevs.com/blog/mysql-error-1064-syntax-error/https://fixdevs.com/blog/mysql-error-1064-syntax-error/How to fix MySQL syntax error 1064 caused by typos, reserved words, wrong quotes, missing commas, version-incompatible syntax, and ORM-generated queries.Mon, 09 Mar 2026 00:00:00 GMTmysqldatabasesqlFixDevshttps://fixdevs.com/blog/mysql-lock-wait-timeout-exceeded/https://fixdevs.com/blog/mysql-lock-wait-timeout-exceeded/How to fix MySQL ERROR 1205 Lock wait timeout exceeded caused by long-running transactions, row-level locks, missing indexes, deadlocks, and InnoDB lock contention.Mon, 09 Mar 2026 00:00:00 GMTmysqldatabasedebuggingFixDevshttps://fixdevs.com/blog/mysql-table-doesnt-exist/https://fixdevs.com/blog/mysql-table-doesnt-exist/How to fix MySQL error 1146 Table doesn't exist caused by wrong database selection, case sensitivity issues, missing migrations, InnoDB tablespace corruption, and cross-OS imports.Mon, 09 Mar 2026 00:00:00 GMTmysqldatabasesqlFixDevshttps://fixdevs.com/blog/postgres-deadlock-detected/https://fixdevs.com/blog/postgres-deadlock-detected/How to fix PostgreSQL deadlock detected error caused by concurrent transactions, conflicting row locks, foreign key locks, and lock ordering issues.Mon, 09 Mar 2026 00:00:00 GMTpostgresqldatabaseFixDevshttps://fixdevs.com/blog/postgres-permission-denied-for-table/https://fixdevs.com/blog/postgres-permission-denied-for-table/How to fix the PostgreSQL error 'permission denied for table' by granting privileges, fixing default permissions, resolving schema and ownership issues, RLS policies, and role inheritance.Mon, 09 Mar 2026 00:00:00 GMTpostgresqldatabasedebuggingFixDevshttps://fixdevs.com/blog/postgres-relation-does-not-exist/https://fixdevs.com/blog/postgres-relation-does-not-exist/How to fix the PostgreSQL 'relation does not exist' error caused by schema search_path issues, case sensitivity, wrong database connections, missing migrations, and more.Mon, 09 Mar 2026 00:00:00 GMTpostgresqldatabasesqlFixDevshttps://fixdevs.com/blog/postgresql-fatal-role-does-not-exist/https://fixdevs.com/blog/postgresql-fatal-role-does-not-exist/How to fix PostgreSQL FATAL role does not exist error caused by missing database roles, peer authentication, wrong usernames, and platform-specific installation defaults.Mon, 09 Mar 2026 00:00:00 GMTpostgresqldatabaseFixDevshttps://fixdevs.com/blog/redis-oom-command-not-allowed/https://fixdevs.com/blog/redis-oom-command-not-allowed/How to fix Redis OOM command not allowed when used memory exceeds maxmemory caused by memory limits, missing eviction policies, large keys, and memory fragmentation.Mon, 09 Mar 2026 00:00:00 GMTredisdatabasedebuggingFixDevshttps://fixdevs.com/blog/postgres-connection-refused/https://fixdevs.com/blog/postgres-connection-refused/How to fix the PostgreSQL error 'could not connect to server: Connection refused' caused by server not running, wrong host/port, pg_hba.conf, or firewall issues.Fri, 13 Feb 2026 00:00:00 GMTpostgresqldatabasedevopsFixDevshttps://fixdevs.com/blog/mysql-too-many-connections/https://fixdevs.com/blog/mysql-too-many-connections/How to fix the MySQL error 1040 'Too many connections' by adjusting max_connections, fixing connection leaks, and optimizing connection pooling.Mon, 09 Feb 2026 00:00:00 GMTmysqldatabaseFixDevshttps://fixdevs.com/blog/postgresql-duplicate-key-violates-unique-constraint/https://fixdevs.com/blog/postgresql-duplicate-key-violates-unique-constraint/How to fix 'duplicate key value violates unique constraint' in PostgreSQL by resetting sequences, using upserts, fixing bulk imports, and handling concurrent inserts.Mon, 26 Jan 2026 00:00:00 GMTpostgresqldatabasedjangoFixDevshttps://fixdevs.com/blog/django-operationalerror-no-such-table/https://fixdevs.com/blog/django-operationalerror-no-such-table/How to fix Django's 'OperationalError: no such table' error caused by missing migrations, wrong database configuration, corrupted files, or Docker volume issues.Wed, 14 Jan 2026 00:00:00 GMTpythondjangodatabaseFixDevshttps://fixdevs.com/blog/mysql-error-2002-cant-connect-through-socket/https://fixdevs.com/blog/mysql-error-2002-cant-connect-through-socket/How to fix MySQL ERROR 2002 (HY000) when the MySQL client can't connect through the Unix socket file on Linux, macOS, Docker, and WSL.Sat, 10 Jan 2026 00:00:00 GMTmysqldatabaselinuxFixDevshttps://fixdevs.com/blog/mongodb-connect-econnrefused/https://fixdevs.com/blog/mongodb-connect-econnrefused/How to fix MongoDB 'MongoServerError: bad auth Authentication failed', 'MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017', and 'MongooseServerSelectionError' connection errors. Covers MongoDB not running, connection string format, Atlas network access, Docker networking, authentication, DNS/SRV issues, TLS/SSL, and Mongoose options.Fri, 02 Jan 2026 00:00:00 GMTmongodbmongoosedatabasedockernodejsFixDevshttps://fixdevs.com/blog/redis-wrongtype-operation/https://fixdevs.com/blog/redis-wrongtype-operation/How to fix Redis errors: WRONGTYPE Operation against a key holding the wrong kind of value, MISCONF Redis is configured to save RDB snapshots, OOM command not allowed, READONLY You can't write against a read only replica, and other common Redis errors. Covers key type mismatches, disk issues, memory limits, eviction policies, connection problems, and serialization.Sat, 27 Dec 2025 00:00:00 GMTredisdatabasedockercachingFixDevshttps://fixdevs.com/blog/mysql-access-denied-for-user/https://fixdevs.com/blog/mysql-access-denied-for-user/How to fix MySQL 'ERROR 1045 (28000): Access denied for user root@localhost (using password: YES/NO)' on Linux, macOS, Windows, and Docker. Covers password reset, auth plugin issues, skip-grant-tables recovery, MySQL 8 vs 5.7 differences, and host mismatches.Sat, 13 Dec 2025 00:00:00 GMTmysqldatabasedockerlinuxFixDevs