{"record":{"id":"723ee2944973abee","repo":"nautechsystems/nautilus_trader","slug":"failed-to-seed-chain-table-e","errorCode":null,"errorMessage":"Failed to seed chain table: {e}","messagePattern":"Failed to seed chain table: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/cache/database.rs","lineNumber":363,"sourceCode":"    /// # Errors\n    ///\n    /// Returns an error if the database operation fails.\n    pub async fn seed_chain(&self, chain: &Chain) -> anyhow::Result<()> {\n        sqlx::query(\n            \"\n            INSERT INTO chain (\n                chain_id, name\n            ) VALUES ($1,$2)\n            ON CONFLICT (chain_id)\n            DO NOTHING\n        \",\n        )\n        .bind(chain.chain_id as i32)\n        .bind(chain.name.to_string())\n        .execute(&self.pool)\n        .await\n        .map(|_| ())\n        .map_err(|e| anyhow::anyhow!(\"Failed to seed chain table: {e}\"))\n    }\n\n    /// Creates a table partition for the block table specific to the given chain\n    /// by calling the existing PostgreSQL function `create_block_partition`.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the database operation fails.\n    pub async fn create_block_partition(&self, chain: &Chain) -> anyhow::Result<String> {\n        let result: (String,) = sqlx::query_as(\"SELECT create_block_partition($1)\")\n            .bind(chain.chain_id as i32)\n            .fetch_one(&self.pool)\n            .await\n            .map_err(|e| {\n                anyhow::anyhow!(\n                    \"Failed to call create_block_partition for chain {}: {e}\",\n                    chain.chain_id\n                )","sourceCodeStart":345,"sourceCodeEnd":381,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/cache/database.rs#L345-L381","documentation":"This error is returned when the SQLx upsert (INSERT ... ON CONFLICT) into the chain table fails while seeding a chain's metadata (chain_id, name). It wraps the underlying sqlx::Error, so the real cause (connectivity, permissions, constraint) is in the chained source.","triggerScenarios":"seed_chain (or the method containing this bind/execute) is called during CacheDatabase setup and the INSERT into the chain table errors — connection failure, insufficient privileges, or a constraint violation on chain_id/name.","commonSituations":"Wrong DATABASE_URL / database not migrated; the DB user lacks INSERT privilege on the chain table; transient connection loss at adapter startup.","solutions":["Inspect the wrapped {e} source for the exact sqlx error","Verify the database is reachable and migrations ran (chain table exists)","Check the DB user has INSERT/UPDATE privileges on the chain table","Retry seeding once connectivity is confirmed"],"exampleFix":"// before\nlet db = CacheDatabase::connect(&url).await?;\n// after: fail fast with context if seeding fails\nlet db = CacheDatabase::connect(&url).await\n    .map_err(|e| anyhow::anyhow!(\"cache DB unreachable, cannot seed chain: {e}\"))?;","handlingStrategy":"retry","validationCode":"// verify migrations applied before seeding\nlet applied: Vec<(String,)> = sqlx::query_as(\"SELECT version FROM _sqlx_migrations\")\n    .fetch_all(&pool).await?;\nif applied.len() < EXPECTED_MIGRATIONS {\n    return Err(anyhow::anyhow!(\"database not migrated; cannot seed chain table\"));\n}","typeGuard":null,"tryCatchPattern":"match db.seed_chain(&chain).await {\n    Ok(()) => (),\n    Err(e) if e.to_string().contains(\"connect\") => {\n        // transient connectivity at startup: retry once\n        tokio::time::sleep(Duration::from_secs(3)).await;\n        db.seed_chain(&chain).await?;\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Point DATABASE_URL at the migrated cache database before adapter startup","Grant the app role INSERT/UPDATE on the chain table","Run a connectivity check before initializing the cache","Log the full error chain ({e:#}) to see the underlying sqlx cause"],"tags":["database","postgres","sqlx","seed"],"backgroundTag":"database-write-failed","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}